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  • 1.
    Aili, Daniel
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Sensor Science and Molecular Physics . Linköping University, The Institute of Technology.
    Tai, Feng-I
    Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
    Enander, Karin
    Linköping University, Department of Physics, Chemistry and Biology, Sensor Science and Molecular Physics . Linköping University, The Institute of Technology.
    Baltzer, Lars
    Department of Biochemistry andOrganic Chemistry Uppsala University, BMC, Box 576, 75123 Uppsala, Sweden.
    Liedberg, Bo
    Linköping University, Department of Physics, Chemistry and Biology, Sensor Science and Molecular Physics . Linköping University, The Institute of Technology.
    Self-Assembly of Fibers and Nanorings from Disulfide-Linked Helix–Loop–Helix Polypeptides2008In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 47, no 30, p. 5554-5556Article in journal (Refereed)
  • 2.
    Alsufyani, Maryam
    et al.
    Univ Oxford, England.
    Stoeckel, Marc-Antoine
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Chen, Xingxing
    King Abdullah Univ Sci & Technol KAUST, Saudi Arabia.
    Thorley, Karl
    Univ Kentucky, KY 40506 USA.
    Hallani, Rawad K.
    King Abdullah Univ Sci & Technol KAUST, Saudi Arabia.
    Puttisong, Yuttapoom
    Linköping University, Department of Physics, Chemistry and Biology, Electronic and photonic materials. Linköping University, Faculty of Science & Engineering.
    Ji, Xudong
    Northwestern Univ, IL 60208 USA.
    Meli, Dilara
    Northwestern Univ, IL 60208 USA.
    Paulsen, Bryan D.
    Northwestern Univ, IL 60208 USA.
    Strzalka, Joseph
    Argonne Natl Lab, IL 60439 USA.
    Regeta, Khrystyna
    King Abdullah Univ Sci & Technol KAUST, Saudi Arabia.
    Combe, Craig
    King Abdullah Univ Sci & Technol KAUST, Saudi Arabia.
    Chen, Hu
    King Abdullah Univ Sci & Technol KAUST, Saudi Arabia.
    Tian, Junfu
    Univ Oxford, England.
    Rivnay, Jonathan
    Northwestern Univ, IL 60208 USA; Northwestern Univ, IL 60611 USA.
    Fabiano, Simone
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    McCulloch, Iain
    Univ Oxford, England; King Abdullah Univ Sci & Technol KAUST, Saudi Arabia.
    Lactone Backbone Density in Rigid Electron-Deficient Semiconducting Polymers Enabling High n-type Organic Thermoelectric Performance2022In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 61, no 7, article id e202113078Article in journal (Refereed)
    Abstract [en]

    Three lactone-based rigid semiconducting polymers were designed to overcome major limitations in the development of n-type organic thermoelectrics, namely electrical conductivity and air stability. Experimental and theoretical investigations demonstrated that increasing the lactone group density by increasing the benzene content from 0 % benzene (P-0), to 50 % (P-50), and 75 % (P-75) resulted in progressively larger electron affinities (up to 4.37 eV), suggesting a more favorable doping process, when employing (N-DMBI) as the dopant. Larger polaron delocalization was also evident, due to the more planarized conformation, which is proposed to lead to a lower hopping energy barrier. As a consequence, the electrical conductivity increased by three orders of magnitude, to achieve values of up to 12 S cm and Power factors of 13.2 mu Wm(-1) K-2 were thereby enabled. These findings present new insights into material design guidelines for the future development of air stable n-type organic thermoelectrics.

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  • 3.
    Aslandukov, Andrey
    et al.
    Univ Bayreuth, Germany.
    Jurzick, Pascal L.
    Univ Cologne, Germany.
    Bykov, Maxim
    Univ Cologne, Germany.
    Aslandukova, Alena
    Univ Bayreuth, Germany.
    Chanyshev, Artem
    Univ Bayreuth, Germany.
    Laniel, Dominique
    Univ Edinburgh, Scotland; Univ Edinburgh, Scotland.
    Yin, Yuqing
    Univ Bayreuth, Germany.
    Akbar, Fariia I.
    Univ Bayreuth, Germany.
    Khandarkhaeva, Saiana
    Univ Bayreuth, Germany.
    Fedotenko, Timofey
    Deutsch Elektronen Synchrotron DESY, Germany.
    Glazyrin, Konstantin
    Deutsch Elektronen Synchrotron DESY, Germany.
    Chariton, Stella
    Univ Chicago, IL 60637 USA.
    Prakapenka, Vitali
    Univ Chicago, IL 60637 USA.
    Wilhelm, Fabrice
    European Synchrotron Radiat Facil, France.
    Rogalev, Andrei
    European Synchrotron Radiat Facil, France.
    Comboni, Davide
    European Synchrotron Radiat Facil, France.
    Hanfland, Michael
    European Synchrotron Radiat Facil, France.
    Doubrovinckaia, Natalia
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering. Univ Bayreuth, Germany.
    Dubrovinsky, Leonid
    Univ Bayreuth, Germany.
    Stabilization Of The CN35− Anion In Recoverable High-pressure Ln3O2(CN3) (Ln=La, Eu, Gd, Tb, Ho, Yb) Oxoguanidinates2023In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773Article in journal (Refereed)
    Abstract [en]

    A series of isostructural Ln(3)O(2)(CN3) (Ln=La, Eu, Gd, Tb, Ho, Yb) oxoguanidinates was synthesized under high-pressure (25-54 GPa) high-temperature (2000-3000 K) conditions in laser-heated diamond anvil cells. The crystal structure of this novel class of compounds was determined via synchrotron single-crystal X-ray diffraction (SCXRD) as well as corroborated by X-ray absorption near edge structure (XANES) measurements and density functional theory (DFT) calculations. The Ln(3)O(2)(CN3) solids are composed of the hitherto unknown CN35- guanidinate anion-deprotonated guanidine. Changes in unit cell volumes and compressibility of Ln(3)O(2)(CN3) (Ln=La, Eu, Gd, Tb, Ho, Yb) compounds are found to be dictated by the lanthanide contraction phenomenon. Decompression experiments show that Ln(3)O(2)(CN3) compounds are recoverable to ambient conditions. The stabilization of the CN35- guanidinate anion at ambient conditions provides new opportunities in inorganic and organic synthetic chemistry.

  • 4.
    Aslandukov, Andrey
    et al.
    University of Bayreuth: Universitat Bayreuth Laboratory of Crystallography, Bayreuth, GERMANY.
    Trybel, Florian
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
    Aslandukova, Alena
    University of Bayreuth: Universitat Bayreuth Bayerisches Geoinstitut, GERMANY.
    Laniel, Dominique
    The University of Edinburgh Centre for Science at Extreme Conditions and School of Physics and Astronomy, UNITED KINGDOM.
    Fedotenko, Timofey
    DESY: Deutsches Elektronen-Synchrotron Photon Science, Deutsches Elektronen-Synchrotron, GERMANY.
    Khandarkhaeva, Saiana
    University of Bayreuth: Universitat Bayreuth Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, GERMANY.
    Aprilis, Georgios
    ESRF European Synchrotron Radiation Facility, FRANCE.
    Giacobbe, Carlotta
    ESRF European Synchrotron Radiation Facility, FRANCE.
    Lawrence Bright, Eleanor
    ESRF European Synchrotron Radiation Facility, FRANCE.
    Abrikosov, Igor A.
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
    Dubrovinsky, Leonid
    University of Bayreuth: Universitat Bayreuth Bayerisches Geoinstitut, GERMANY.
    Dubrovinskaia, Natalia
    University of Bayreuth: Universitat Bayreuth Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, GERMANY.
    Anionic N18 Macrocycles and a Polynitrogen Double Helix in Novel Yttrium Polynitrides YN6 and Y2N11 at 100 GPa2022In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 61, no 34, article id e202207469Article in journal (Refereed)
    Abstract [en]

    Two novel yttrium nitrides, YN6 and Y2N11, were synthesized by direct reaction between yttrium and nitrogen at 100 GPa and 3000 K in a laser-heated diamond anvil cell. High-pressure synchrotron single-crystal X-ray diffraction revealed that the crystal structures of YN6 and Y2N11 feature a unique organization of nitrogen atoms-a previously unknown anionic N-18 macrocycle and a polynitrogen double helix, respectively. Density functional theory calculations, confirming the dynamical stability of the YN6 and Y2N11 compounds, show an anion-driven metallicity, explaining the unusual bond orders in the polynitrogen units. As the charge state of the polynitrogen double helix in Y2N11 is different from that previously found in Hf2N11 and because N-18 macrocycles have never been predicted or observed, their discovery significantly extends the chemistry of polynitrides.

  • 5.
    Bally, Marta
    et al.
    Chalmers, Sweden .
    Rydell, Gustaf E.
    Institute Curie, France .
    Zahn, Raphael
    University of Zurich, Switzerland Swiss Federal Institute Technology, Switzerland .
    Nasir, Waqas
    University of Gothenburg, Sweden .
    Eggeling, Christian
    Max Planck Institute Biophys Chemistry, Germany .
    Breimer, Michael E.
    University of Gothenburg, Sweden .
    Svensson, Lennart
    Linköping University, Department of Clinical and Experimental Medicine, Molecular Virology. Linköping University, Faculty of Health Sciences.
    Hook, Fredrik
    Chalmers, Sweden .
    Larson, Gran
    University of Gothenburg, Sweden .
    Norovirus GII.4 Virus-like Particles Recognize Galactosylceramides in Domains of Planar Supported Lipid Bilayers2012In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 51, no 48, p. 12020-12024Article in journal (Refereed)
    Abstract [en]

    n/a

  • 6.
    Barragan, Ana
    et al.
    IMDEA Nanosci Inst, Spain.
    Nicolas-Garcia, Tomas
    IMDEA Nanosci Inst, Spain.
    Lauwaet, Koen
    IMDEA Nanosci Inst, Spain.
    Sanchez-Grande, Ana
    IMDEA Nanosci Inst, Spain; Czech Acad Sci, Czech Republic.
    Urgel, Jose I
    IMDEA Nanosci Inst, Spain.
    Björk, Jonas
    Linköping University, Department of Physics, Chemistry and Biology, Materials design. Linköping University, Faculty of Science & Engineering.
    Perez, Emilio M.
    IMDEA Nanosci Inst, Spain.
    Ecija, David
    IMDEA Nanosci Inst, Spain.
    Design and Manipulation of a Minimalistic Hydrocarbon Nanocar on Au(111)2023In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 62, no 6, article id e202212395Article in journal (Refereed)
    Abstract [en]

    Nanocars are carbon-based single-molecules with a precise design that facilitates their atomic-scale control on a surface. The rational design of these molecules is important in atomic and molecular-scale manipulation to advance the development of molecular machines, as well as for a better understanding of self-assembly, diffusion and desorption processes. Here, we introduce the molecular design and construction of a collection of minimalistic nanocars. They feature an anthracene chassis and four benzene derivatives as wheels. After sublimation and adsorption on an Au(111) surface, we show controlled and fast manipulation of the nanocars along the surface using the tip of a scanning tunneling microscope (STM). The mechanism behind the successful displacement is the induced dipole created over the nanocar by the STM tip. We utilized carbon monoxide functionalized tips both to avoid decomposition and accidentally picking the nanocars up during the manipulation. This strategy allowed thousands of maneuvers to successfully win the Nanocar Race II championship.

  • 7.
    Björk, Jonas
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Materials design. Linköping University, Faculty of Science & Engineering.
    Sanchez-Sanchez, Carlos
    Swiss Fed Labs Mat Sci & Technol, Switzerland; Inst Mat Sci Madrid ICMM CSIC, Spain.
    Chen, Qiang
    Max Planck Inst Polymer Res, Germany; Univ Oxford, England.
    Pignedoli, Carlo A.
    Swiss Fed Labs Mat Sci & Technol, Switzerland.
    Rosén, Johanna
    Linköping University, Department of Physics, Chemistry and Biology, Materials design. Linköping University, Faculty of Science & Engineering.
    Ruffieux, Pascal
    Swiss Fed Labs Mat Sci & Technol, Switzerland.
    Feng, Xinliang
    Tech Univ Dresden, Germany; Tech Univ Dresden, Germany.
    Narita, Akimitsu
    Max Planck Inst Polymer Res, Germany; Okinawa Inst Sci & Technol Grad Univ, Japan.
    Mullen, Klaus
    Max Planck Inst Polymer Res, Germany.
    Fasel, Roman
    Swiss Fed Labs Mat Sci & Technol, Switzerland; Univ Bern, Switzerland.
    The Role of Metal Adatoms in a Surface-Assisted Cyclodehydrogenation Reaction on a Gold Surface2022In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 61, no 49, article id e202212354Article in journal (Refereed)
    Abstract [en]

    Dehydrogenation reactions are key steps in many metal-catalyzed chemical processes and in the on-surface synthesis of atomically precise nanomaterials. The principal role of the metal substrate in these reactions is undisputed, but the role of metal adatoms remains, to a large extent, unanswered, particularly on gold substrates. Here, we discuss their importance by studying the surface-assisted cyclodehydrogenation on Au(111) as an ideal model case. We choose a polymer theoretically predicted to give one of two cyclization products depending on the presence or absence of gold adatoms. Scanning probe microscopy experiments observe only the product associated with adatoms. We challenge the prevalent understanding of surface-assisted cyclodehydrogenation, unveiling the catalytic role of adatoms and their effect on regioselectivity. The study adds new perspectives to the understanding of metal catalysis and the design of on-surface synthesis protocols for novel carbon nanomaterials.

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  • 8.
    Bruening, Lukas
    et al.
    Univ Cologne, Germany.
    Jena, Nityasagar
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Medicine and Health Sciences.
    Bykova, Elena
    Goethe Univ Frankfurt, Germany.
    Jurzick, Pascal L.
    Univ Cologne, Germany.
    Flosbach, Niko T.
    Univ Cologne, Germany.
    Mezouar, Mohamed
    European Synchrotron Radiat Facil, France.
    Hanfland, Michael
    European Synchrotron Radiat Facil, France.
    Giordano, Nico
    Deutsch Elektronen Synchrotron DESY, Germany.
    Fedotenko, Timofey
    Deutsch Elektronen Synchrotron DESY, Germany.
    Winkler, Bjoern
    Goethe Univ Frankfurt, Germany.
    Abrikosov, Igor
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
    Bykov, Maxim
    Univ Cologne, Germany.
    Stabilization of Guanidinate Anions [CN3]5− in Calcite-Type SbCN32023In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773Article in journal (Refereed)
    Abstract [en]

    The stabilization of nitrogen-rich phases presents a significant chemical challenge due to the inherent stability of the dinitrogen molecule. This stabilization can be achieved by utilizing strong covalent bonds in complex anions with carbon, such as cyanide CN- and NCN(2- )carbodiimide, while more nitrogen-rich carbonitrides are hitherto unknown. Following a rational chemical design approach, we synthesized antimony guanidinate SbCN3 at pressures of 32-38 GPa using various synthetic routes in laser-heated diamond anvil cells. SbCN3, which is isostructural to calcite CaCO3, can be recovered under ambient conditions. Its structure contains the previously elusive guanidinate anion [CN3](5-), marking a fundamental milestone in carbonitride chemistry. The crystal structure of SbCN3 was solved and refined from synchrotron single-crystal X-ray diffraction data and was fully corroborated by theoretical calculations, which also predict that SbCN3 has a direct band gap with the value of 2.20 eV. This study opens a straightforward route to the entire new family of inorganic nitridocarbonates.

  • 9.
    Bykov, Maxim
    et al.
    Univ Bayreuth, Germany.
    Bykova, Elena
    Deutsch Elektronen Synchrotron DESY, Germany.
    Koemets, Egor
    Univ Bayreuth, Germany.
    Fedotenko, Timofey
    Univ Bayreuth, Germany.
    Aprilis, Georgios
    Univ Bayreuth, Germany.
    Glazyrin, Konstantin
    Deutsch Elektronen Synchrotron DESY, Germany.
    Liermann, Hanns-Peter
    Deutsch Elektronen Synchrotron DESY, Germany.
    Ponomareva, Alena V.
    Natl Univ Sci and Technol MISIS, Russia.
    Tidholm, Johan
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
    Tasnadi, Ferenc
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
    Abrikosov, Igor A.
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
    Dubrovinskaia, Natalia
    Univ Bayreuth, Germany.
    Dubrovinsky, Leonid
    Univ Bayreuth, Germany.
    High-Pressure Synthesis of a Nitrogen-Rich Inclusion Compound ReN8·xN2 with Conjugated Polymeric Nitrogen Chains2018In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 57, no 29, p. 9048-9053Article in journal (Refereed)
    Abstract [en]

    A nitrogen-rich compound, ReN(8)xN(2), was synthesized by a direct reaction between rhenium and nitrogen at high pressure and high temperature in a laser-heated diamond anvil cell. Single-crystal X-ray diffraction revealed that the crystal structure, which is based on the ReN8 framework, has rectangular-shaped channels that accommodate nitrogen molecules. Thus, despite a very high synthesis pressure, exceeding 100GPa, ReN(8)xN(2) is an inclusion compound. The amount of trapped nitrogen (x) depends on the synthesis conditions. The polydiazenediyl chains [-N=N-] that constitute the framework have not been previously observed in any compound. Abinitio calculations on ReN(8)xN(2) provide strong support for the experimental results and conclusions.

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  • 10.
    Bykov, Maxim
    et al.
    Howard Univ, DC 20059 USA; Carnegie Inst Sci, DC 20015 USA.
    Bykova, Elena
    Carnegie Inst Sci, DC 20015 USA.
    Ponomareva, Alena V.
    Natl Univ Sci & Technol MISIS, Russia.
    Abrikosov, Igor
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
    Chariton, Stella
    Univ Chicago, IL 60437 USA.
    Prakapenka, Vitali B.
    Univ Chicago, IL 60437 USA.
    Mahmood, Mohammad F.
    Howard Univ, DC 20059 USA.
    Dubrovinsky, Leonid
    Bayer Geoinst, Germany.
    Goncharov, Alexander F.
    Carnegie Inst Sci, DC 20015 USA.
    Stabilization of Polynitrogen Anions in Tantalum-Nitrogen Compounds at High Pressure2021In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 60, no 16, p. 9003-9008Article in journal (Refereed)
    Abstract [en]

    The synthesis of polynitrogen compounds is of great importance due to their potential as high-energy-density materials (HEDM), but because of the intrinsic instability of these compounds, their synthesis and stabilization is a fundamental challenge. Polymeric nitrogen units which may be stabilized in compounds with metals at high pressure are now restricted to non-branched chains with an average N-N bond order of 1.25, limiting their HEDM performances. Herein, we demonstrate the synthesis of a novel polynitrogen compound TaN5 via a direct reaction between tantalum and nitrogen in a diamond anvil cell at circa 100 GPa. TaN5 is the first example of a material containing branched all-single-bonded nitrogen chains [N-5(5-)](infinity). Apart from that we discover two novel Ta-N compounds: TaN4 with finite N-4(4-) chains and the incommensurately modulated compound TaN2-x, which is recoverable at ambient conditions.

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  • 11.
    Bykov, Maxim
    et al.
    Howard Univ, DC 20059 USA; Univ Bayreuth, Germany; Carnegie Inst Sci, DC 20015 USA.
    Chariton, Stella
    Univ Chicago, IL 60437 USA.
    Bykova, Elena
    Carnegie Inst Sci, DC 20015 USA.
    Khandarkhaeva, Saiana
    Univ Bayreuth, Germany.
    Fedotenko, Timofey
    Univ Bayreuth, Germany.
    Ponomareva, Alena V
    Natl Univ Sci and Technol MISIS, Russia.
    Tidholm, Johan
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
    Tasnadi, Ferenc
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
    Abrikosov, Igor
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
    Sedmak, Pavel
    European Synchrotron Radiat Facil, France.
    Prakapenka, Vitali
    Univ Chicago, IL 60437 USA.
    Hanfland, Michael
    European Synchrotron Radiat Facil, France.
    Liermann, Hanns-Peter
    DESY, Germany.
    Mahmood, Mohammad
    Howard Univ, DC 20059 USA.
    Goncharov, Alexander F.
    Carnegie Inst Sci, DC 20015 USA.
    Doubrovinckaia, Natalia
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering. Univ Bayreuth, Germany.
    Dubrovinsky, Leonid
    Univ Bayreuth, Germany.
    High-Pressure Synthesis of Metal-Inorganic Frameworks Hf4N20 center dot N-2, WN8 center dot N-2, and Os5N28 center dot 3 N-2 with Polymeric Nitrogen Linkers2020In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 59, no 26, p. 10321-10326Article in journal (Refereed)
    Abstract [en]

    Polynitrides are intrinsically thermodynamically unstable at ambient conditions and require peculiar synthetic approaches. Now, a one-step synthesis of metal-inorganic frameworks Hf4N20 center dot N2, WN 8 center dot N2, and Os5N28 center dot 3N2 via direct reactions between elements in a diamond anvil cell at pressures exceeding 100 GPa is reported. The porous frameworks (Hf4N20, WN 8, and Os5N28) are built from transition-metal atoms linked either by polymeric polydiazenediyl (polyacetylene-like) nitrogen chains or through dinitrogen units. Triply bound dinitrogen molecules occupy channels of these frameworks. Owing to conjugated polydiazenediyl chains, these compounds exhibit metallic properties. The high-pressure reaction between Hf and N2 also leads to a non-centrosymmetric polynitride Hf2N11 that features double-helix catenapoly[tetraz-1-ene-1,4-diyl] nitrogen chains [-N-N-N=N-](infinity.)

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  • 12.
    Chen, Yi-Jing
    et al.
    Shantou Univ, Peoples R China.
    Zhang, Jun-Zheng
    Shantou Univ, Peoples R China.
    Wu, Zhixing
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Qiao, Ying-Xin
    Shantou Univ, Peoples R China.
    Zheng, Lei
    Shantou Univ, Peoples R China.
    Wondu Dagnaw, Fentahun
    Shantou Univ, Peoples R China.
    Tong, Qing-Xiao
    Shantou Univ, Peoples R China.
    Jian, Jing-Xin
    Shantou Univ, Peoples R China.
    Molecular Engineering of Perylene Diimide Polymers with a Robust Built-in Electric Field for Enhanced Solar-Driven Water Splitting2023In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773Article in journal (Refereed)
    Abstract [en]

    The built-in electric field of the polymer semiconductors could be regulated by the dipole moment of its building blocks, thereby promoting the separation of photogenerated carriers and achieving efficient solar-driven water splitting. Herein, three perylene diimide (PDI) polymers, namely oPDI, mPDI and pPDI, are synthesized with different phenylenediamine linkers. Notably, the energy level structure, light-harvesting efficiency, and photogenerated carrier separation and migration of polymers are regulated by the orientation of PDI unit. Among them, oPDI enables a large dipole moment and robust built-in electric field, resulting in enhanced solar-driven water splitting performance. Under simulated sunlight irradiation, oPDI exhibits the highest photocurrent of 115.1 mu A cm-2 for photoelectrochemical oxygen evolution, which is 11.5 times that of mPDI, 26.8 times that of pPDI and 104.6 times that of its counterparts PDI monomer at the same conditions. This work provides a strategy for designing polymers by regulating the orientation of structural units to construct efficient solar energy conversion systems. Three perylene diimide (PDI) polymers were designed and synthesized such that the molecular orientation of the PDI units was regulated to create and modulate their built-in electric fields. Due to the large dipole moment and interfacial electric field, oPDI enables an extraordinary photocurrent density of 115.1 mu A & sdot; cm-2, which is 11.5 and 26.8 times that of mPDI and pPDI, respectively.image

  • 13.
    Comina, German
    et al.
    Linköping University, Department of Physics, Chemistry and Biology. Linköping University, Faculty of Science & Engineering.
    Suska, Anke
    Linköping University, Department of Physics, Chemistry and Biology, Chemical and Optical Sensor Systems. Linköping University, Faculty of Science & Engineering.
    Filippini, Daniel
    Linköping University, Department of Physics, Chemistry and Biology, Chemical and Optical Sensor Systems. Linköping University, Faculty of Science & Engineering.
    Autonomous Chemical Sensing Interface for Universal Cell Phone Readout2015In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 54, no 30, p. 8708-8712Article in journal (Refereed)
    Abstract [en]

    Exploiting the ubiquity of cell phones for quantitative chemical sensing imposes strong demands on interfacing devices. They should be autonomous, disposable, and integrate all necessary calibration and actuation elements. In addition, a single design should couple universally to a variety of cell phones, and operate in their default configuration. Here, we demonstrate such a concept and its implementation as a quantitative glucose meter that integrates finger pumps, unidirectional valves, calibration references, and focusing optics on a disposable device configured for universal video acquisition.

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  • 14.
    Fan, Baobing
    et al.
    City Univ Hong Kong, Peoples R China.
    Gao, Wei
    City Univ Hong Kong, Peoples R China.
    Zhang, Rui
    Linköping University, Department of Physics, Chemistry and Biology, Electronic and photonic materials. Linköping University, Faculty of Science & Engineering.
    Kaminsky, Werner
    Univ Washington, WA 98195 USA.
    Tang, Lingxiao
    Xi An Jiao Tong Univ, Peoples R China.
    Lin, Francis R.
    City Univ Hong Kong, Peoples R China.
    Wang, Yiwen
    City Univ Hong Kong, Peoples R China.
    Fan, Qunping
    Xi An Jiao Tong Univ, Peoples R China.
    Ma, Wei
    Xi An Jiao Tong Univ, Peoples R China.
    Gao, Feng
    Linköping University, Department of Physics, Chemistry and Biology, Electronic and photonic materials. Linköping University, Faculty of Science & Engineering.
    Jen, Alex K. -Y.
    City Univ Hong Kong, Peoples R China; Univ Washington, WA 98195 USA.
    Correlation of Broad Absorption Band with Small Singlet-Triplet Energy Gap in Organic Photovoltaics2023In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773Article in journal (Refereed)
    Abstract [en]

    Organic photovoltaics (OPV) are one of the most effective ways to harvest renewable solar energy, with the power conversion efficiency (PCE) of the devices soaring above 19% when processed with halogenated solvents. The superior photocurrent of OPV over other emerging photovoltaics offers more opportunities to further improve the efficiency. Tailoring the absorption band of photoactive materials is an effective way to further enhance OPV photocurrent. However, the field has mostly been focusing on improving the near-infrared region photo-response, with the absorption shoulders in short-wavelength region (SWR) usually being neglected. Herein, by developing a series of non-fullerene acceptors (NFAs) with varied side-group conjugations, we observe an enhanced SWR absorption band with increased side-group conjugation length. The underpinning factors of how molecular structures and geometries improve SWR absorption are clearly elucidated through theoretical modelling and crystallography. Moreover, a clear relationship between the enhanced SWR absorption and reduced singlet-triplet energy gap is established, both of which are favorable for the OPV performance and can be tailored by rational structure design of NFAs. Finally, the rationally designed NFA, BO-TTBr, affords a decent PCE of 18.5% when processed with a non-halogenated green solvent.

  • 15.
    Fan, Qunping
    et al.
    Xi An Jiao Tong Univ, Peoples R China.
    Ma, Ruijie
    Hong Kong Polytech Univ, Peoples R China.
    Yang, Jie
    Beijing Inst Technol, Peoples R China.
    Gao, Jingshun
    Xi An Jiao Tong Univ, Peoples R China; Zhongyuan Univ Technol, Peoples R China.
    Bai, Hairui
    Xi An Jiao Tong Univ, Peoples R China.
    Su, Wenyan
    Xian Univ Sci & Technol, Peoples R China.
    Liang, Zezhou
    Xi An Jiao Tong Univ, Peoples R China.
    Wu, Yue
    Soochow Univ, Peoples R China.
    Tang, Lingxiao
    Xi An Jiao Tong Univ, Peoples R China.
    Li, Yuxiang
    Xian Univ Sci & Technol, Peoples R China.
    Wu, Qiang
    Xi An Jiao Tong Univ, Peoples R China.
    Wang, Kun
    Zhongyuan Univ Technol, Peoples R China.
    Yan, Lihe
    Xi An Jiao Tong Univ, Peoples R China.
    Zhang, Rui
    Linköping University, Department of Physics, Chemistry and Biology, Electronic and photonic materials. Linköping University, Faculty of Science & Engineering.
    Gao, Feng
    Linköping University, Department of Physics, Chemistry and Biology, Electronic and photonic materials. Linköping University, Faculty of Science & Engineering.
    Li, Gang
    Hong Kong Polytech Univ, Peoples R China.
    Ma, Wei
    Xi An Jiao Tong Univ, Peoples R China.
    Unidirectional Sidechain Engineering to Construct Dual-Asymmetric Acceptors for 19.23 % Efficiency Organic Solar Cells with Low Energy Loss and Efficient Charge Transfer2023In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773Article in journal (Refereed)
    Abstract [en]

    Achieving both high open-circuit voltage (V-oc) and short-circuit current density (J(sc)) to boost power-conversion efficiency (PCE) is a major challenge for organic solar cells (OSCs), wherein high energy loss (E-loss) and inefficient charge transfer usually take place. Here, three new Y-series acceptors of mono-asymmetric asy-YC11 and dual-asymmetric bi-asy-YC9 and bi-asy-YC12 are developed. They share the same asymmetric D(1)AD(2) (D-1=thieno[3,2-b]thiophene and D-2=selenopheno[3,2-b]thiophene) fused-core but have different unidirectional sidechain on D-1 side, allowing fine-tuned molecular properties, such as intermolecular interaction, packing pattern, and crystallinity. Among the binary blends, the PM6 : bi-asy-YC12 one has better morphology with appropriate phase separation and higher order packing than the PM6 : asy-YC9 and PM6 : bi-asy-YC11 ones. Therefore, the PM6 : bi-asy-YC12-based OSCs offer a higher PCE of 17.16 % with both high V-oc and J(sc), due to the reduced E-loss and efficient charge transfer properties. Inspired by the high V-oc and strong NIR-absorption, bi-asy-YC12 is introduced into efficient binary PM6 : L8-BO to construct ternary OSCs. Thanks to the broadened absorption, optimized morphology, and furtherly minimized E-loss, the PM6 : L8-BO : bi-asy-YC12-based OSCs achieve a champion PCE of 19.23 %, which is one of the highest efficiencies among these annealing-free devices. Our developed unidirectional sidechain engineering for constructing bi-asymmetric Y-series acceptors provides an approach to boost PCE of OSCs.

  • 16.
    Feng, Kui
    et al.
    Southern Univ Sci & Technol SUSTech, Peoples R China; Southern Univ Sci & Technol SUSTech, Peoples R China.
    Shan, Wentao
    Southern Univ Sci & Technol SUSTech, Peoples R China; Southern Univ Sci & Technol SUSTech, Peoples R China.
    Ma, Suxiang
    Southern Univ Sci & Technol SUSTech, Peoples R China; Southern Univ Sci & Technol SUSTech, Peoples R China.
    Wu, Ziang
    Korea Univ, South Korea.
    Chen, Jianhua
    Southern Univ Sci & Technol SUSTech, Peoples R China; Southern Univ Sci & Technol SUSTech, Peoples R China.
    Guo, Han
    Southern Univ Sci & Technol SUSTech, Peoples R China; Southern Univ Sci & Technol SUSTech, Peoples R China.
    Liu, Bin
    Southern Univ Sci & Technol SUSTech, Peoples R China; Southern Univ Sci & Technol SUSTech, Peoples R China.
    Wang, Junwei
    Southern Univ Sci & Technol SUSTech, Peoples R China; Southern Univ Sci & Technol SUSTech, Peoples R China.
    Li, Bangbang
    Southern Univ Sci & Technol SUSTech, Peoples R China; Southern Univ Sci & Technol SUSTech, Peoples R China.
    Woo, Han Young
    Korea Univ, South Korea.
    Fabiano, Simone
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Huang, Wei
    Univ Elect Sci & Technol China UESTC, Peoples R China.
    Guo, Xugang
    Southern Univ Sci & Technol SUSTech, Peoples R China; Southern Univ Sci & Technol SUSTech, Peoples R China.
    Fused Bithiophene Imide Dimer-Based n-Type Polymers for High-Performance Organic Electrochemical Transistors2021In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 60, no 45, p. 24198-24205Article in journal (Refereed)
    Abstract [en]

    The development of n-type organic electrochemical transistors (OECTs) lags far behind their p-type counterparts. In order to address this dilemma, we report here two new fused bithiophene imide dimer (f-BTI2)-based n-type polymers with a branched methyl end-capped glycol side chain, which exhibit good solubility, low-lying LUMO energy levels, favorable polymer chain orientation, and efficient ion transport property, thus yielding a remarkable OECT electron mobility (mu(e)) of up to approximate to 10(-2) cm(2) V-1 s(-1) and volumetric capacitance (C*) as high as 443 F cm(-3), simultaneously. As a result, the f-BTI2TEG-FT-based OECTs deliver a record-high maximum geometry-normalized transconductance of 4.60 S cm(-1) and a maximum mu C* product of 15.2 F cm(-1) V-1 s(-1). The mu C* figure of merit is more than one order of magnitude higher than that of the state-of-the-art n-type OECTs. The emergence of f-BTI2TEG-FT brings a new paradigm for developing high-performance n-type polymers for low-power OECT applications.

  • 17.
    Gao, Lei
    et al.
    Donghua Univ, Peoples R China; Wuzhou Univ, Peoples R China.
    Baryshnikov, Glib
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering. Bohdan Khmelnytsky Natl Univ, Ukraine.
    Ali, Amjad
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Kuklin, Artem
    Uppsala Univ, Sweden.
    Qian, Cheng
    Donghua Univ, Peoples R China.
    Zhang, Xianrui
    Wuzhou Univ, Peoples R China.
    Chen, Fengkun
    Donghua Univ, Peoples R China.
    Yi, Tao
    Donghua Univ, Peoples R China.
    Wu, Hongwei
    Donghua Univ, Peoples R China.
    Hydrophilic Cocrystals with Water Switched Luminescence2024In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773Article in journal (Refereed)
    Abstract [en]

    Utilizing water molecules to regulate the luminescence properties of solid materials is highly challenging. Herein, we develop a strategy to produce water-triggered luminescence-switching cocrystals by coassembling hydrophilic donors with electron-deficient acceptors, where 1,2,4,5-Tetracyanobenzene (TCNB) was used as the electron acceptor and pyridyl benzimidazole derivatives were used as the electron donors enabling multiple hydrogen-bonds. Two cocrystals, namely 2PYTC and 4PYTC were obtained and showed heat-activated emission, and such emission could be quenched or weakened by adding water molecules. The cocrystal structure exhibited the donor molecule that can form multiple hydro bonds with water and acceptor molecules due to the many nitrogen atoms of them. The analyses of the photophysical data, powder X-ray diffraction, and other data confirmed the reversible fluorescence "on-off" effects were caused by eliminating and adding water molecules in the crystal lattice. The density functional theory calculations indicate that the vibration of the O-H bond of water molecules in the cocrystal can absorb the excitation energy and suppress fluorescence. Furthermore, the obtained cocrystals also showed temperature, humidity, and H+/NH4+ responsive emission behavior, which allows their applications as thermal and humidity sensors, and multiple information encryptions. This research paves the way for preparing intelligent hydrophilic organic cocrystal luminescent materials. Hydrophilic donors with electron-deficient acceptors were coassembled to achieve luminescence-switching cocrystals triggered by water molecules. The obtained cocrystals show a strong water absorption ability and excellent fluorescence properties. The emission of cocrystals can be reversibly switched by heating and water. Finally, the obtained cocrystals show potential applications in temperature-humidity and acid-base responses.+image

  • 18.
    Greczynski, Grzegorz
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
    Hultman, Lars
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
    Compromising Science by Ignorant Instrument Calibration-Need to Revisit Half a Century of Published XPS Data2020In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 59, no 13, p. 5002-5006Article in journal (Refereed)
    Abstract [en]

    X-ray photoelectron spectroscopy (XPS) is an indispensable technique in modern materials science for the determination of chemical bonding as evidenced by more than 10 000 XPS papers published annually. A literature survey reveals that in the vast majority of cases an incorrect referencing of the binding energy scale is used, neglecting warnings that have been formulated from the early days of the technique. Consequences for the data reliability are disastrous and decades of XPS work require revisiting. The purpose of this Viewpoint is to highlight the existing problems, review the criticism and suggest ways forward.

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  • 19.
    Grossmann, Lukas
    et al.
    Deutsch Museum, Germany; Tech Univ Munich, Germany.
    Ringel, Eva
    Deutsch Museum, Germany; Tech Univ Munich, Germany.
    Rastgoo-Lahrood, Atena
    Deutsch Museum, Germany; Tech Univ Munich, Germany.
    King, Benjamin T.
    Univ Nevada, NV 89557 USA.
    Rosén, Johanna
    Linköping University, Department of Physics, Chemistry and Biology, Materials design. Linköping University, Faculty of Science & Engineering.
    Heckl, Wolfgang M.
    Deutsch Museum, Germany; Tech Univ Munich, Germany.
    Opris, Dorina
    Empa, Switzerland.
    Björk, Jonas
    Linköping University, Department of Physics, Chemistry and Biology, Materials design. Linköping University, Faculty of Science & Engineering.
    Lackinger, Markus
    Deutsch Museum, Germany; Tech Univ Munich, Germany.
    Steering Self-Assembly of Three-Dimensional Iptycenes on Au(111) by Tuning Molecule-Surface Interactions2022In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 61, no 25, article id e202201044Article in journal (Refereed)
    Abstract [en]

    Self-assembly of three-dimensional molecules is scarcely studied on surfaces. Their modes of adsorption can exhibit far greater variability compared to (nearly) planar molecules that adsorb mostly flat on surfaces. This additional degree of freedom can have decisive consequences for the expression of intermolecular binding motifs, hence the formation of supramolecular structures. The determining molecule-surface interactions can be widely tuned, thereby providing a new powerful lever for crystal engineering in two dimensions. Here, we study the self-assembly of triptycene derivatives with anthracene blades on Au(111) by Scanning Tunneling Microscopy, Near Edge X-ray Absorption Fine Structure and Density Functional Theory. The impact of molecule-surface interactions was experimentally tested by comparing pristine with iodine-passivated Au(111) surfaces. Thereby, we observed a fundamental change of the adsorption mode that triggered self-assembly of an entirely different structure.

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  • 20.
    Herland, Anna
    et al.
    Cell and Molecular Biology, Karolinska Institute, Stockholm.
    Persson, Kristin M
    Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
    Lundin, Vanessa
    Cell and Molecular Biology, Karolinska Institute, Stockholm.
    Fahlman, Mats
    Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, The Institute of Technology.
    Berggren, Magnus
    Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
    Jager, Edwin W H
    Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, The Institute of Technology.
    Teixeira, Ana I
    Cell and Molecular Biology, Karolinska Institute, Stockholm.
    Electrochemical Control of Growth Factor Presentation To Steer Neural Stem Cell Differentiation2011In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 50, no 52, p. 12529-12533Article in journal (Refereed)
    Abstract [en]

    Graphical Abstract

    Let it grow: The conjugated polymer poly(3,4-ethylenedioxythiophene) (PEDOT) was synthesized with heparin as the counterion to form a cell culture substrate. The surface of PEDOT:heparin in the neutral state associated biologically active growth factors (see picture). Electrochemical in situ oxidation of PEDOT during live cell culture decreased the bioavailability of the growth factor and created an exact onset of neural stem cell differentiation.

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  • 21.
    Ji, Fuxiang
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Klarbring, Johan
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
    Wang, Feng
    Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Ning, Weihua
    Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Wang, Linqin
    KTH Royal Inst Technol, Sweden.
    Yin, Chunyang
    Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Mendoza Figueroa, José Silvestre
    Linköping University, Department of Physics, Chemistry and Biology, Biophysics and bioengineering. Linköping University, Faculty of Science & Engineering.
    Christensen, Christian Kolle
    DESY, Germany.
    Etter, Martin
    DESY, Germany.
    Ederth, Thomas
    Linköping University, Department of Physics, Chemistry and Biology, Biophysics and bioengineering. Linköping University, Faculty of Science & Engineering.
    Sun, Licheng
    KTH Royal Inst Technol, Sweden; Dalian Univ Technol, Peoples R China.
    Simak, Sergey
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
    Abrikosov, Igor
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering. Natl Univ Sci and Technol MISIS, Russia.
    Gao, Feng
    Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Lead-Free Halide Double Perovskite Cs2AgBiBr6with Decreased Band Gap2020In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 59, no 35, p. 15191-15194Article in journal (Refereed)
    Abstract [en]

    Environmentally friendly halide double perovskites with improved stability are regarded as a promising alternative to lead halide perovskites. The benchmark double perovskite, Cs2AgBiBr6, shows attractive optical and electronic features, making it promising for high-efficiency optoelectronic devices. However, the large band gap limits its further applications, especially for photovoltaics. Herein, we develop a novel crystal-engineering strategy to significantly decrease the band gap by approximately 0.26 eV, reaching the smallest reported band gap of 1.72 eV for Cs(2)AgBiBr(6)under ambient conditions. The band-gap narrowing is confirmed by both absorption and photoluminescence measurements. Our first-principles calculations indicate that enhanced Ag-Bi disorder has a large impact on the band structure and decreases the band gap, providing a possible explanation of the observed band-gap narrowing effect. This work provides new insights for achieving lead-free double perovskites with suitable band gaps for optoelectronic applications.

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  • 22.
    Jianhao, Bai
    et al.
    Division of Bioengineering, National University of Singapore, Singapore.
    Sebastian, Beyer
    Division of Bioengineering, National University of Singapore, Singapore.
    Wing Cheung, Mak
    Department of Chemistry, Hong Kong University of Science and Technology, Hong Kong SAR, P.R. China.
    Raj, Rajagopalan
    Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore.
    Dieter, Trau
    Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore and .
    Inwards buildup of concentric polymer layers: A method for biomolecule encapsulation and microcapsule encoding2010In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 49, no 330, p. 5189-5193Article in journal (Refereed)
    Abstract [en]

    Encoding by encapsulation: A polymeric shell fabrication approach combines biomolecule encapsulation with encoding. Striated polymeric shells, fabricated through an inwards diffusion of poly(allylamine) into the matrices of agarose microbeads, serves to encapsulate the biomolecules within the microcapsule. Encoding is performed through the color and/or thickness permutation of the striated polymeric shells (see picture).

  • 23.
    Koller, Thaddaeus J.
    et al.
    Univ Munich LMU, Germany.
    Jin, Siyu
    Sichuan Univ, Peoples R China.
    Krol, Viktoria
    Univ Edinburgh, Scotland.
    Ambach, Sebastian J.
    Univ Munich LMU, Germany.
    Ranieri, Umbertoluca
    Univ Edinburgh, Scotland.
    Khandarkhaeva, Saiana
    Univ Bayreuth, Germany.
    Spender, James
    Univ Edinburgh, Scotland.
    McWilliams, Stewart
    Univ Edinburgh, Scotland.
    Trybel, Florian
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
    Giordano, Nico
    Deutsch Elektronen-Synchrotron DESY, Germany.
    Poreba, Tomasz
    ID27 High Pressure Beamline, France.
    Mezouar, Mohamed
    ID27 High Pressure Beamline, France.
    Kuang, Xiaoyu
    Sichuan Univ, Peoples R China.
    Lu, Cheng
    China Univ Geosci Wuhan, Peoples R China.
    Dubrovinsky, Leonid
    Univ Bayreuth, Germany.
    Dubrovinskaia, Natalia
    Univ Bayreuth, Germany.
    Hermann, Andreas
    Univ Edinburgh, Scotland.
    Schnick, Wolfgang
    Univ Munich LMU, Germany.
    Laniel, Dominique
    Univ Edinburgh, Scotland.
    Simple Molecules under High-Pressure and High-Temperature Conditions: Synthesis and Characterization of α- and β-C(NH)2 with Fully sp3-Hybridized Carbon2024In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773Article in journal (Refereed)
    Abstract [en]

    The elements hydrogen, carbon, and nitrogen are among the most abundant in the solar system. Still, little is known about the ternary compounds these elements can form under the high-pressure and high-temperature conditions found in the outer planets' interiors. These materials are also of significant research interest since they are predicted to feature many desirable properties such as high thermal conductivity and hardness due to strong covalent bonding networks. In this study, the high-pressure high-temperature reaction behavior of malononitrile H2C(CN)(2), dicyandiamide (H2N)(2)C=NCN, and melamine (C3N3)(NH2)(3) was investigated in laser-heated diamond anvil cells. Two previously unknown compounds, namely alpha-C(NH)(2) and beta-C(NH)(2), have been synthesized and found to have fully sp(3)-hybridized carbon atoms. alpha-C(NH)(2) crystallizes in a distorted beta-cristobalite structure, while beta-C(NH)(2) is built from previously unknown imide-bridged 2,4,6,8,9,10-hexaazaadamantane units, which form two independent interpenetrating diamond-like networks. Their stability domains and compressibility were studied, for which supporting density functional theory calculations were performed.

  • 24.
    Li, Guowei
    et al.
    Max Planck Inst Chem Phys Solids, Germany.
    Fu, Chenguang
    Max Planck Inst Chem Phys Solids, Germany.
    Shi, Wujun
    ShanghaiTech Univ, Peoples R China.
    Jiao, Lin
    Max Planck Inst Chem Phys Solids, Germany.
    Wu, Jiquan
    Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, Faculty of Science & Engineering.
    Yang, Qun
    Max Planck Inst Chem Phys Solids, Germany.
    Saha, Rana
    Max Planck Inst Microstruct Phys, Germany.
    Kamminga, Machteld E.
    Univ Groningen, Netherlands.
    Srivastava, Abhay K.
    Max Planck Inst Microstruct Phys, Germany.
    Liu, Enke
    Max Planck Inst Chem Phys Solids, Germany.
    Yazdani, Aliza N.
    Carleton Coll, MN 55057 USA.
    Kumar, Nitesh
    Max Planck Inst Chem Phys Solids, Germany.
    Zhang, Jian
    Tech Univ Dresden, Germany.
    Blake, Graeme R.
    Univ Groningen, Netherlands.
    Liu, Xianjie
    Linköping University, Department of Physics, Chemistry and Biology, Surface Physics and Chemistry. Linköping University, Faculty of Science & Engineering.
    Fahlman, Mats
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Wirth, Steffen
    Max Planck Inst Chem Phys Solids, Germany.
    Auffermann, Gudrun
    Max Planck Inst Chem Phys Solids, Germany.
    Gooth, Johannes
    Max Planck Inst Chem Phys Solids, Germany.
    Parkin, Stuart
    Max Planck Inst Microstruct Phys, Germany.
    Madhavan, Vidya
    Univ Illinois, IL 61801 USA; Univ Illinois, IL 61801 USA.
    Feng, Xinliang
    Tech Univ Dresden, Germany.
    Sun, Yan
    Max Planck Inst Chem Phys Solids, Germany.
    Felser, Claudia
    Max Planck Inst Chem Phys Solids, Germany.
    Dirac Nodal Arc Semimetal PtSn4: An Ideal Platform for Understanding Surface Properties and Catalysis for Hydrogen EvolutionIn: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773Article in journal (Refereed)
    Abstract [en]

    Conductivity, carrier mobility, and a suitable Gibbs free energy are important criteria that determine the performance of catalysts for a hydrogen evolution reaction (HER). However, it is a challenge to combine these factors into a single compound. Herein, we discover a superior electrocatalyst for a HER in the recently identified Dirac nodal arc semimetal PtSn4. The determined turnover frequency (TOF) for each active site of PtSn4 is 1.54 H-2 s(-1) at 100 mV. This sets a benchmark for HER catalysis on Pt-based noble metals and earth-abundant metal catalysts. We make use of the robust surface states of PtSn4 as their electrons can be transferred to the adsorbed hydrogen atoms in the catalytic process more efficiently. In addition, PtSn4 displays excellent chemical and electrochemical stabilities after long-term exposure in air and long-time HER stability tests.

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  • 25.
    Li, Qizhao
    et al.
    East China Univ Sci & Technol, Peoples R China; East China Univ Sci & Technol, Peoples R China.
    Ishida, Masatoshi
    Tokyo Metropolitan Univ, Japan.
    Wang, Yunyun
    East China Univ Sci & Technol, Peoples R China; East China Univ Sci & Technol, Peoples R China.
    Li, Chengjie
    East China Univ Sci & Technol, Peoples R China; East China Univ Sci & Technol, Peoples R China.
    Baryshnikov, Glib
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Zhu, Bin
    East China Univ Sci & Technol, Peoples R China; East China Univ Sci & Technol, Peoples R China.
    Sha, Feng
    East China Univ Sci & Technol, Peoples R China; East China Univ Sci & Technol, Peoples R China.
    Wu, Xinyan
    East China Univ Sci & Technol, Peoples R China; East China Univ Sci & Technol, Peoples R China.
    agren, Hans
    Uppsala Univ, Sweden.
    Furuta, Hiroyuki
    Kyushu Univ, Japan.
    Xie, Yongshu
    East China Univ Sci & Technol, Peoples R China; East China Univ Sci & Technol, Peoples R China.
    Antiaromatic Sapphyrin Isomer: Transformation into Contracted Porphyrinoids with Variable Aromaticity2023In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773Article in journal (Refereed)
    Abstract [en]

    Sapphyrin is a pentapyrrolic expanded porphyrin with a 22 pi aromatic character. Herein, we report the synthesis of a 20 pi antiaromatic sapphyrin isomer 1 by oxidative cyclization of a pentapyrrane precursor P-5 with a terminal beta-linked pyrrole. The resulting isomer 1, containing a mis-linked bipyrrole unit in the skeleton, exhibits a reactivity for further oxidation due to the distinct antiaromatic electronic structure, affording a fused macrocycle 2, possessing a spiro-carbon-containing [5.6.5.6]-tetracyclic structure. Subsequent treatment with an acid afforded a weakly aromatic pyrrolone-appended N-confused corrole 3, and thermal fusion gave a [5.6.5.7]-tetracyclic-ring-embedded 14 pi aromatic triphyrin(2.1.1) analog 4. The cyclization at the mis-linked pyrrole moiety of P-5 played a crucial role in synthesizing the antiaromatic porphyrinoid susceptible to facile transformation to novel porphyrinoids with variable aromaticity.

  • 26.
    Li, Yiran
    et al.
    Donghua Univ, Peoples R China; Fudan Univ, Peoples R China.
    Baryshnikov, Glib
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Siddique, Farhan
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Wei, Peng
    Donghua Univ, Peoples R China.
    Wu, Hongwei
    Donghua Univ, Peoples R China.
    Yi, Tao
    Donghua Univ, Peoples R China; Fudan Univ, Peoples R China.
    Vibration-Regulated Multi-State Long-Lived Emission from Star-Shaped Molecules2022In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 61, no 48, article id e202213051Article in journal (Refereed)
    Abstract [en]

    How to utilize molecular vibration to tune triplet-involved emissions in multiple states is highly challenging. Here, star-shaped triphenylamine derivatives have been employed as model systems to understand how molecular vibration affects thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) emissions in multiple states. Nonplanar, star-shaped conformations allow molecules to generate appropriate vibrations in the solution state, facilitating vibronic coupling between their T-1 and T-2 states to generate effective TADF. More importantly, a relatively dispersed state can allow the molecules to efficiently vibrate in the solid state, and a crystalline environment further promotes a more efficient TADF. Lastly, by suppressing molecular vibration to inhibit the TADF, ultra-long RTP was observed upon doping these molecules into polymers. These molecules can be used in information encryption and storage as well as bioimaging.

  • 27.
    Li, Yiran
    et al.
    Donghua Univ, Peoples R China; Fudan Univ, Peoples R China.
    Baryshnikov, Glib
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Xu, Chenggang
    Donghua Univ, Peoples R China.
    Agren, Hans
    Uppsala Univ, Sweden.
    Zhu, Liangliang
    Fudan Univ, Peoples R China.
    Yi, Tao
    Donghua Univ, Peoples R China.
    Zhao, Yanli
    Nanyang Technol Univ, Singapore.
    Wu, Hongwei
    Donghua Univ, Peoples R China; Nanyang Technol Univ, Singapore.
    Photoinduced Radical Emission in a Coassembly System2021In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 60, no 44, p. 23842-23848Article in journal (Refereed)
    Abstract [en]

    Developing radical emission at ambient conditions is a challenging task since radical species are unstable in air. In the present work, we overcome this challenge by coassembling a series of tricarbonyl-substituted benzene molecules with polyvinyl alcohol (PVA). The strong hydrogen bonds between the guest dopants and the PVA host matrix protect the free radicals of carbonyl compounds after light irradiation, leading to strong solid state free radical emission. Changing temperature and peripheral functional groups of the tricarbonyl-substituted benzenes can influence the intensity of the radical emission. Quantum-chemical calculations predict that such free radical fluorescence originates from anti-Kasha D-2 -> D-0 vertical emission by the anion radicals. The photoinduced radical emission by the tricarbonyl-substituted benzenes was successfully utilized for information encryption application.

  • 28.
    Liu, Qian
    et al.
    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China .
    Shi, Jianbo
    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China .
    Sun, Jianteng
    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China .
    Wang, Thanh
    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China .
    Zeng, Lixi
    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China .
    Jiang, Guibin
    State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China .
    Graphene and graphene oxide sheets supported on silica as versatile and high-performance adsorbents for solid-phase extraction2011In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 50, no 26, p. 5913-5917Article in journal (Refereed)
  • 29.
    Liu, Wei
    et al.
    Cent South Univ, Peoples R China.
    Zhang, Huotian
    Linköping University, Department of Physics, Chemistry and Biology, Electronic and photonic materials. Linköping University, Faculty of Science & Engineering.
    Liang, Songting
    Cent South Univ, Peoples R China.
    Wang, Tong
    Imperial Coll London, England; Imperial Coll London, England.
    He, Siqing
    Cent South Univ, Peoples R China.
    Hu, Yunbin
    Cent South Univ, Peoples R China.
    Zhang, Rui
    Linköping University, Department of Physics, Chemistry and Biology, Electronic and photonic materials. Linköping University, Faculty of Science & Engineering.
    Ning, Haoqing
    Imperial Coll London, England; Imperial Coll London, England.
    Ren, Jie
    Zhejiang Univ, Peoples R China.
    Bakulin, Artem
    Imperial Coll London, England.
    Gao, Feng
    Linköping University, Department of Physics, Chemistry and Biology, Electronic and photonic materials. Linköping University, Faculty of Science & Engineering.
    Yuan, Jun
    Cent South Univ, Peoples R China.
    Zou, Yingping
    Cent South Univ, Peoples R China.
    The Synthesis of a Multiple D-A Conjugated Macrocycle and Its Application in Organic Photovoltaic2023In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773Article in journal (Refereed)
    Abstract [en]

    As a novel class of materials, D-A conjugated macrocycles hold significant promise for chemical science. However, their potential in photovoltaic remains largely untapped due to the complexity of introducing multiple donor and acceptor moieties into the design and synthesis of cyclic pi-conjugated molecules. Here, we report a multiple D-A ring-like conjugated molecule (RCM) via the coupling of dimer molecule DBTP-C3 as a template and thiophenes in high yields. RCM exhibits a narrow optical gap (1.33 eV) and excellent thermal stability, and shows a remarkable photoluminescence yield (phi PL) of 11.1 % in solution, much higher than non-cyclic analogues. Organic solar cell (OSC) constructed with RCM as electron acceptor shows efficient charge separation at donor-acceptor band offsets and achieves a power conversion efficiency (PCE) of 14.2 %-approximately fourfold higher than macrocycle-based OSCs reported so far. This is partly due to low non-radiative voltage loss down to 0.20 eV and a high electroluminescence yield (phi EL) of 4x10-4. Our findings emphasize the potential of D-A cyclic conjugated molecules in advancing organic photovoltaic technology. A multiple D-A ring-like conjugated molecule, RCM was synthesized via a template-directed process. RCM inherits the superior photovoltaic properties characteristic of D-A linear molecules, including a narrow optical gap and effective charge transfer. Importantly, RCM demonstrates reduced non-radiative losses, attributable to its minimized vibration.+image

  • 30.
    Lukatskaya, Maria R.
    et al.
    Engineering Department, Drexel University, Philadelphia, USA.
    Halim, Joseph
    Engineering Department, Drexel University, Philadelphia, USA.
    Dyatkin, Boris
    Engineering Department, Drexel University, Philadelphia, USA.
    Naguib, Michael
    Engineering Department, Drexel University, Philadelphia, USA.
    Buranova, Yulia S.
    Engineering Department, Drexel University, Philadelphia, USA.
    Barsoum, Michel W.
    Engineering Department, Drexel University, Philadelphia, USA.
    Gogotsi, Yury
    Engineering Department, Drexel University, Philadelphia, USA.
    Room-Temperature Carbide-Derived Carbon Synthesis by Electrochemical Etching of MAX Phases2014In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 126, no 19, p. 4977-4980Article in journal (Refereed)
    Abstract [en]

    Porous carbons are widely used in energy storage and gas separation applications, but their synthesis always involves high temperatures. Herein we electrochemically selectively extract, at ambient temperature, the metal atoms from the ternary layered carbides, Ti3AlC2, Ti2AlC and Ti3SiC2 (MAX phases). The result is a predominantly amorphous carbide-derived carbon, with a narrow distribution of micropores. The latter is produced by placing the carbides in HF, HCl or NaCl solutions and applying anodic potentials. The pores that form when Ti3AlC2 is etched in dilute HF are around 0.5 nm in diameter. This approach forgoes energy-intensive thermal treatments and presents a novel method for developing carbons with finely tuned pores for a variety of applications, such as supercapacitor, battery electrodes or CO2 capture.

  • 31.
    Lundqvist, Martin
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Molecular Biotechnology. Linköping University, The Institute of Technology.
    Nygren, Patrik
    Linköping University, Department of Physics, Chemistry and Biology, Molecular Biotechnology. Linköping University, The Institute of Technology.
    Jonsson, Bengt-Harald
    Linköping University, Department of Physics, Chemistry and Biology, Molecular Biotechnology. Linköping University, The Institute of Technology.
    Broo, Klas
    Linköping University, Department of Physics, Chemistry and Biology, Applied Optics . Linköping University, The Institute of Technology.
    Induction of structure and function in a designed peptide upon adsorption on a silica nanoparticle2006In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 45, no 48, p. 8169-8173Article in journal (Refereed)
    Abstract [en]

    No abstrack available.

  • 32.
    Ou, Pan
    et al.
    Anhui Univ, Peoples R China; Anhui Univ, Peoples R China.
    Zhang, Ruilong
    Anhui Univ, Peoples R China; Anhui Univ, Peoples R China.
    Liu, Zhengjie
    Anhui Univ, Peoples R China; Anhui Univ, Peoples R China.
    Tian, Xiaohe
    Anhui Univ, Peoples R China; Anhui Univ, Peoples R China.
    Han, Guangmei
    Chinese Acad Sci, Peoples R China.
    Liu, Bianhua
    Chinese Acad Sci, Peoples R China.
    Hu, Zhang-Jun
    Linköping University, Department of Physics, Chemistry and Biology, Molecular Surface Physics and Nano Science. Linköping University, Faculty of Science & Engineering.
    Zhang, Zhongping
    Anhui Univ, Peoples R China; Anhui Univ, Peoples R China; Chinese Acad Sci, Peoples R China.
    Gasotransmitter Regulation of Phosphatase Activity in Live Cells Studied by Three-Channel Imaging Correlation2019In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 58, no 8, p. 2261-2265Article in journal (Refereed)
    Abstract [en]

    Enzyme activity in live cells is dynamically regulated by small-molecule transmitters for maintaining normal physiological functions. A few probes have been devised to measure intracellular enzyme activities by fluorescent imaging, but the study of the regulation of enzyme activity via gasotransmitters in situ remains a long-standing challenge. Herein, we report a three-channel imaging correlation by a single dual-reactive fluorescent probe to measure the dependence of phosphatase activity on the H2S level in cells. The two sites of the probe reactive to H2S and phosphatase individually produce blue and green fluorescent responses, respectively, and resonance energy transfer can be triggered by their coexistence. Fluorescent analysis based on the three-channel imaging correlation shows that cells have an ideal level of H2S to promote phosphatase activity up to its maximum. Significantly, a slight deviation from this H2S level leads to a sharp decrease of phosphatase activity. The discovery further strengthens our understanding of the importance of H2S in cellular signaling and in various human diseases.

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  • 33.
    Paintner, Tobias
    et al.
    Tech Univ Munich, Germany.
    Björk, Jonas
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
    Du, Ping
    Karlsruhe Inst Technol, Germany.
    Klyatskaya, Svetlana
    Karlsruhe Inst Technol, Germany.
    Paszkiewicz, Mateusz
    Tech Univ Munich, Germany.
    Hellwig, Raphael
    Tech Univ Munich, Germany.
    Uphoff, Martin
    Tech Univ Munich, Germany.
    Oener, Murat A.
    Tech Univ Munich, Germany.
    Cuniberto, Edoardo
    Tech Univ Munich, Germany.
    Deimel, Peter S.
    Tech Univ Munich, Germany.
    Zhang, Yi-Qi
    Tech Univ Munich, Germany.
    Palma, Carlos-Andres
    Tech Univ Munich, Germany; Chinese Acad Sci, Peoples R China.
    Allegretti, Francesco
    Tech Univ Munich, Germany.
    Ruben, Mario
    Karlsruhe Inst Technol, Germany; Univ Strasbourg, France.
    Barth, Johannes V
    Tech Univ Munich, Germany.
    Klappenberger, Florian
    Tech Univ Munich, Germany.
    Quantum Tunneling Mediated Interfacial Synthesis of a Benzofuran Derivative2019In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 58, no 33, p. 11285-11290Article in journal (Refereed)
    Abstract [en]

    Reaction pathways involving quantum tunneling of protons are fundamental to chemistry and biology. They are responsible for essential aspects of interstellar synthesis, the degradation and isomerization of compounds, enzymatic activity, and protein dynamics. On-surface conditions have been demonstrated to open alternative routes for organic synthesis, often with intricate transformations not accessible in solution. Here, we investigate a hydroalkoxylation reaction of a molecular species adsorbed on a Ag(111) surface by scanning tunneling microscopy complemented by X-ray electron spectroscopy and density functional theory. The closure of the furan ring proceeds at low temperature (down to 150 K) and without detectable side reactions. We unravel a proton-tunneling-mediated pathway theoretically and confirm experimentally its dominant contribution through the kinetic isotope effect with the deuterated derivative.

  • 34.
    Pedersen, Viktor B. R.
    et al.
    Univ Copenhagen, Denmark.
    Pedersen, Stephan K.
    Univ Copenhagen, Denmark.
    Jin, Zexin
    Columbia Univ, NY 10027 USA.
    Kofod, Nicolaj
    Univ Copenhagen, Denmark.
    Laursen, Bo W.
    Univ Copenhagen, Denmark.
    Baryshnikov, Glib
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Nuckolls, Colin
    Columbia Univ, NY 10027 USA.
    Pittelkow, Michael
    Univ Copenhagen, Denmark.
    Electronic Materials: An Antiaromatic Propeller Made from the Four-Fold Fusion of Tetraoxa[8]circulene and Perylene Diimides2022In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 61, no 48, article id e202212293Article in journal (Refereed)
    Abstract [en]

    The synthesis of an antiaromatic tetraoxa[8]circulene annulated with four perylene diimides (PDI), giving a dynamic non-planar pi-conjugated system, is described. The molecule contains 32 aromatic rings surrounding one formally antiaromatic planarized cyclooctatetraene (COT). The intense absorption (epsilon=3.35x10(5) M-1 cm(-1) in CH2Cl2) and emission bands are assigned to internal charge-transfer transitions in the combined PDI-circulene pi-system. The spectroscopic data is supported by density functional theory calculations, and nuclear independent chemical shift calculation indicate that the antiaromatic COT has increased aromaticity in the reduced state. Electrochemical studies show that the compound can reversibly reach the tetra- and octa-anionic states by reduction of the four PDI units, and the deca-anionic state by reduction of the central COT ring. The material functions effectively in bulk hetero junction solar cells as a non-fullerene acceptor, reaching a power conversion efficiency of 6.4 %.

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  • 35.
    Preechaburana, Pakorn
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Physics. Linköping University, Faculty of Science & Engineering.
    Gonzalez, Marcos
    Linköping University, Department of Physics, Chemistry and Biology, Applied Physics. Linköping University, The Institute of Technology.
    Suska, Anke
    Linköping University, Department of Physics, Chemistry and Biology, Applied Physics. Linköping University, The Institute of Technology.
    Filippini, Daniel
    Linköping University, Department of Physics, Chemistry and Biology, Applied Physics. Linköping University, The Institute of Technology.
    Surface Plasmon Resonance Chemical Sensing on Cell Phones2012In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 51, no 46, p. 11585-11588Article in journal (Refereed)
    Abstract [en]

    Chemosensing based on angle-resolved surface plasmon resonance is demonstrated on intact cell phones using a disposable optical coupler and software to configure illumination and acquisition. This coupler operates on different cell phones and is applied for classical affinity assays with commercial chips and custom-made tests with embedded calibration. Measured performance (2.14x10−6 refractive index units) is comparable with compact SPR systems.

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  • 36.
    Qi, Feng
    et al.
    City Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China.
    Li, Yanxun
    City Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China.
    Zhang, Rui
    Linköping University, Department of Physics, Chemistry and Biology, Electronic and photonic materials. Linköping University, Faculty of Science & Engineering.
    Lin, Francis R. R.
    City Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China.
    Liu, Kaikai
    City Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China.
    Fan, Qunping
    Xi An Jiao Tong Univ, Peoples R China.
    Jen, Alex K. -Y.
    City Univ Hong Kong, Peoples R China; City Univ Hong Kong, Peoples R China; Univ Washington, WA 98195 USA; City Univ Hong Kong, Peoples R China.
    Dimer Acceptor Adopting a Flexible Linker for Efficient and Durable Organic Solar Cells2023In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, article id e202303066Article in journal (Refereed)
    Abstract [en]

    Organic solar cells (OSCs) have advanced rapidly due to the development of new photovoltaic materials. However, the long-term stability of OSCs still poses a severe challenge for their commercial deployment. To address this issue, a dimer acceptor (dT9TBO) with flexible linker is developed for incorporation into small-molecule acceptors to form molecular alloy with enhanced intermolecular packing and suppressed molecular diffusion to stabilize active layer morphology. Consequently, the PM6 : Y6 : dT9TBO-based device displays an improved power conversion efficiency (PCE) of 18.41 % with excellent thermal stability and negligible decay after being aged at 65 degrees C for 1800 h. Moreover, the PM6 : Y6 : dT9TBO-based flexible OSC also exhibits excellent mechanical durability, maintaining 95 % of its initial PCE after being bended repetitively for 1500 cycles. This work provides a simple and effective way to fine-tune the molecular packing with stabilized morphology to overcome the trade-off between OSC efficiency and stability.

  • 37.
    Qin, Linqing
    et al.
    Univ Chinese Acad Sci, Peoples R China.
    Liu, Xingzheng
    Univ Chinese Acad Sci, Peoples R China.
    Zhang, Xin
    Univ Chinese Acad Sci, Peoples R China.
    Yu, Jianwei
    Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Yang, Lei
    Univ Chinese Acad Sci, Peoples R China.
    Zhao, Fenggui
    Beijing Jiaotong Univ, Peoples R China.
    Huang, Miaofei
    Chinese Acad Sci, Peoples R China.
    Wang, Kangwei
    School of Science Beijing Jiaotong University, Beijing, Peoples R China.
    Wu, Xiaoxi
    Univ Chinese Acad Sci, Peoples R China.
    Li, Yuhao
    Chinese Univ Hong Kong, Hong Kong, Peoples R China.
    Chen, Hao
    Univ Chinese Acad Sci, Peoples R China.
    Wang, Kai
    Wuhan Univ Technol, Wuhan, Peoples R China.
    Xia, Jianlong
    Wuhan Univ Technol, Peoples R China.
    Lu, Xinhui
    Chinese Univ Hong Kong, Hong Kong, Peoples R China.
    Gao, Feng
    Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Yi, Yuanping
    Chinese Acad Sci, Peoples R China.
    Huang, Hui
    Univ Chinese Acad Sci, Peoples R China.
    Triplet Acceptors with a D-A Structure and Twisted Conformation for Efficient Organic Solar Cells2020In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 59, no 35, p. 15043-15049Article in journal (Refereed)
    Abstract [en]

    Triplet acceptors have been developed to construct high-performance organic solar cells (OSCs) as the long lifetime and diffusion range of triplet excitons may dissociate into free charges instead of net recombination when the energy levels of the lowest triplet state (T-1) are close to those of charge-transfer states ((CT)-C-3). The current triplet acceptors were designed by introducing heavy atoms to enhance the intersystem crossing, limiting their applications. Herein, two twisted acceptors without heavy atoms, analogues of Y6, constructed with large pi-conjugated core and D-A structure, were confirmed to be triplet materials, leading to high-performance OSCs. The mechanism of triplet excitons were investigated to show that the twisted and D-A structures result in large spin-orbit coupling (SOC) and small energy gap between the singlet and triplet states, and thus efficient intersystem crossing. Moreover, the energy level of T-1 is close to (CT)-C-3, facilitating the split of triplet exciton to free charges.

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  • 38.
    Rastgoo-Lahrood, Atena
    et al.
    Technical University of Munich, Germany; Deutsch Museum, Germany; Nanosyst Initiat Munich, Germany; Centre Nanosci, Germany.
    Björk, Jonas
    Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
    Lischka, Matthias
    Technical University of Munich, Germany; Deutsch Museum, Germany; Nanosyst Initiat Munich, Germany; Centre Nanosci, Germany.
    Eichhorn, Johanna
    Technical University of Munich, Germany; Deutsch Museum, Germany; Nanosyst Initiat Munich, Germany; Centre Nanosci, Germany.
    Kloft, Stephan
    Technical University of Munich, Germany; Deutsch Museum, Germany; Nanosyst Initiat Munich, Germany; Centre Nanosci, Germany.
    Fritton, Massimo
    Technical University of Munich, Germany; Deutsch Museum, Germany; Nanosyst Initiat Munich, Germany; Centre Nanosci, Germany.
    Strunskus, Thomas
    University of Kiel, Germany.
    Samanta, Debabrata
    University of Siegen, Germany.
    Schmittel, Michael
    University of Siegen, Germany.
    Heckl, Wolfgang M.
    Technical University of Munich, Germany; Deutsch Museum, Germany; Nanosyst Initiat Munich, Germany; Centre Nanosci, Germany.
    Lackinger, Markus
    Technical University of Munich, Germany; Deutsch Museum, Germany; Nanosyst Initiat Munich, Germany; Centre Nanosci, Germany.
    Post-Synthetic Decoupling of On-Surface-Synthesized Covalent Nanostructures from Ag(111)2016In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 55, no 27, p. 7650-7654Article in journal (Refereed)
    Abstract [en]

    The on-surface synthesis of covalent organic nanosheets driven by reactive metal surfaces leads to strongly adsorbed organic nanostructures, which conceals their intrinsic properties. Hence, reducing the electronic coupling between the organic networks and commonly used metal surfaces is an important step towards characterization of the true material. We demonstrate that post-synthetic exposure to iodine vapor leads to the intercalation of an iodine monolayer between covalent polyphenylene networks and Ag(111) surfaces. The experimentally observed changes from surface-bound to detached nanosheets are reproduced by DFT simulations. These findings suggest that the intercalation of iodine provides a material that shows geometric and electronic properties substantially closer to those of the freestanding network.

  • 39.
    Sanchez-Grande, Ana
    et al.
    IMDEA Nanociencia, Spain.
    de la Torre, Bruno
    Palacky Univ Olomouc, Czech Republic; Czech Acad Sci, Czech Republic.
    Santos, Jose
    IMDEA Nanociencia, Spain.
    Cirera, Borja
    IMDEA Nanociencia, Spain.
    Lauwaet, Koen
    IMDEA Nanociencia, Spain.
    Chutora, Taras
    Palacky Univ Olomouc, Czech Republic.
    Edalatmanesh, Shayan
    Czech Acad Sci, Czech Republic.
    Mutombo, Pingo
    Czech Acad Sci, Czech Republic.
    Rosén, Johanna
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
    Zboril, Radek
    Palacky Univ Olomouc, Czech Republic.
    Miranda, Rodolfo
    IMDEA Nanociencia, Spain; Univ Autonoma Madrid, Spain.
    Björk, Jonas
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
    Jelinek, Pavel
    Palacky Univ Olomouc, Czech Republic; Czech Acad Sci, Czech Republic.
    Martin, Nazario
    IMDEA Nanociencia, Spain; Univ Complutense, Spain.
    Ecija, David
    IMDEA Nanociencia, Spain.
    On-Surface Synthesis of Ethynylene-Bridged Anthracene Polymers2019In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 58, no 20, p. 6559-6563Article in journal (Refereed)
    Abstract [en]

    Engineering low-band-gap -conjugated polymers is a growing area in basic and applied research. The main synthetic challenge lies in the solubility of the starting materials, which precludes advancements in the field. Here, we report an on-surface synthesis protocol to overcome such difficulties and produce poly(p-anthracene ethynylene) molecular wires on Au(111). To this aim, a quinoid anthracene precursor with =CBr2 moieties is deposited and annealed to 400K, resulting in anthracene-based polymers. High-resolution nc-AFM measurements confirm the nature of the ethynylene-bridge bond between the anthracene moieties. Theoretical simulations illustrate the mechanism of the chemical reaction, highlighting three major steps: dehalogenation, diffusion of surface-stabilized carbenes, and homocoupling, which enables the formation of an ethynylene bridge. Our results introduce a novel chemical protocol to design -conjugated polymers based on oligoacene precursors and pave new avenues for advancing the emerging field of on-surface synthesis.

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  • 40.
    Schuett, Fabian M.
    et al.
    Ulm Univ, Germany.
    Esau, Derek
    Queens Univ, Canada.
    Varvaris, K. Liam
    Queens Univ, Canada.
    Gelman, Shelly
    Queens Univ, Canada.
    Björk, Jonas
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
    Rosén, Johanna
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
    Jerkiewicz, Gregory
    Queens Univ, Canada.
    Jacob, Timo
    Ulm Univ, Germany; Helmholtz Inst Ulm HIU, Germany; Karlsruhe Inst Technol KIT, Germany.
    Controlled-Atmosphere Flame Fusion Single-Crystal Growth of Non-Noble fcc, hcp, and bcc Metals Using Copper, Cobalt, and Iron2020In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 59, no 32, p. 13246-13252Article in journal (Refereed)
    Abstract [en]

    The growth of noble-metal single crystals via the flame fusion method was developed in the 1980s. Since then, there have been no major advancements to the technique until the recent development of the controlled-atmosphere flame fusion (CAFF) method to grow non-noble Ni single crystals. Herein, we demonstrate the generality of this method with the first preparation of fcc Cu as well as the first hcp and bcc single crystals of Co and Fe, respectively. The high quality of the single crystals was verified using scanning electron microscopy and Laue X-ray backscattering. Based on Wulff constructions, the equilibrium shapes of the single-crystal particles were studied, confirming the symmetry of the fcc, hcp, and bcc single-crystal lattices. The low cost of the CAFF method makes all kinds of high-quality non-noble single crystals independent of their lattice accessible for use in electrocatalysis, electrochemistry, surface science, and materials science.

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  • 41.
    Shi, Yongqiang
    et al.
    Anhui Normal Univ, Peoples R China; Anhui Normal Univ, Peoples R China.
    Li, Jianfeng
    Southern Univ Sci & Technol SUSTech, Peoples R China.
    Sun, Hengda
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering. Donghua Univ, Peoples R China.
    Li, Yongchun
    Southern Univ Sci & Technol SUSTech, Peoples R China.
    Wang, Yimei
    Southern Univ Sci & Technol SUSTech, Peoples R China.
    Wu, Ziang
    Korea Univ, South Korea.
    Jeong, Sang Young
    Korea Univ, South Korea.
    Woo, Han Young
    Korea Univ, South Korea.
    Fabiano, Simone
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Guo, Xugang
    Southern Univ Sci & Technol SUSTech, Peoples R China.
    Thiazole Imide-Based All-Acceptor Homopolymer with Branched Ethylene Glycol Side Chains for Organic Thermoelectrics2022In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 61, no 51, article id e202214192Article in journal (Refereed)
    Abstract [en]

    n-Type semiconducting polymers with high thermoelectric performance remain challenging due to the scarcity of molecular design strategy, limiting their applications in organic thermoelectric (OTE) devices. Herein, we provide a new approach to enhance the OTE performance of n-doped polymers by introducing acceptor-acceptor (A-A) type backbone bearing branched ethylene glycol (EG) side chains. When doped with 4-(2,3-dihydro-1,3-dimethyl-1H-benzimidazol-2-yl)-N,N-dimethylbenzenamine (N-DMBI), the A-A homopolymer PDTzTI-TEG exhibits n-type electrical conductivity (sigma) up to 34 S cm(-1) and power factor value of 15.7 mu W m(-1) K-2. The OTE performance of PDTzTI-TEG is far greater than that of homopolymer PBTI-TEG (sigma=0.27 S cm(-1)), indicating that introducing electron-deficient thiazole units in the backbone further improves the n-doping efficiency. These results demonstrate that developing A-A type polymers with EG side chains is an effective strategy to enhance n-type OTE performance.

  • 42.
    Sun, Hao
    et al.
    Fudan Univ, Peoples R China.
    He, Menglu
    Tongji Univ, Peoples R China.
    Baryshnikov, Glib
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Wu, Bin
    Fudan Univ, Peoples R China.
    Valiev, Rashid R.
    Tomsk State Univ, Russia.
    Shen, Shen
    Fudan Univ, Peoples R China.
    Zhang, Man
    Fudan Univ, Peoples R China.
    Xu, Xiaoyan
    Fudan Univ, Peoples R China.
    Li, Zhongyu
    Fudan Univ, Peoples R China.
    Liu, Guofeng
    Tongji Univ, Peoples R China.
    Agren, Hans
    Uppsala Univ, Sweden.
    Zhu, Liangliang
    Fudan Univ, Peoples R China.
    Engineering Tunable Ratiometric Dual Emission in Single Emitter-based Amorphous Systems2024In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773Article in journal (Refereed)
    Abstract [en]

    Molecular emitters with multi-emissive properties are in high demand in numerous fields, while these properties basically depend on specific molecular conformation and packing. For amorphous systems, special molecular arrangement is unnecessary, but it remains challenging to achieve such luminescent behaviors. Herein, we present a general strategy that takes advantage of molecular rigidity and S1-T1 energy gap balance for emitter design, which enables fluorescence-phosphorescence dual-emission properties in various solid forms, whether crystalline or amorphous. Subsequently, the amorphism of the emitters based polymethyl methacrylate films endowed an in situ regulation of the dual-emissive characteristics. With the ratiometric regulation of phosphorescence by external stimuli and stable fluorescence as internal reference, highly controllable luminescent color tuning (yellow to blue including white emission) was achieved. There properties together with a persistent luminous behavior is of benefit for an irreplaceable set of optical information combination, featuring an ultrahigh-security anti-counterfeiting ability. Our research introduces a concept of eliminating the crystal-form and molecular-conformational dependence of complex luminescent properties through emitter molecular design. This has profound implications for the development of functional materials. A molecular structural strategy enabling single emitter based dual-emission properties in various solid forms is presented. The developed amorphous films endow in situ regulation of the dual-emissive characteristics to show highly controllable multiple luminescent color tuning (yellow to blue including white emission), which benefits to the construction of an irreplaceable set of optical information combination.image

  • 43.
    Ulrich, Christian
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Applied Physics . Linköping University, The Institute of Technology.
    Andersson, Olof
    Linköping University, Department of Physics, Chemistry and Biology, Sensor Science and Molecular Physics . Linköping University, The Institute of Technology.
    Nyholm, Leif
    Department of Materials Chemistry, Uppsala University, P.O. Box 538, 75121 Uppsala, Sweden.
    Björefors, Fredrik
    Linköping University, Department of Physics, Chemistry and Biology, Sensor Science and Molecular Physics . Linköping University, The Institute of Technology.
    Formation of Molecular Gradients on Bipolar Electrodes2008In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 47, no 16, p. 3034-3036Article in journal (Refereed)
  • 44.
    Wang, Liulin
    et al.
    Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China.
    Du, Wei
    Northwestern Polytech Univ, Peoples R China.
    Hu, Zhang-Jun
    Linköping University, Department of Physics, Chemistry and Biology, Molecular Surface Physics and Nano Science. Linköping University, Faculty of Science & Engineering.
    Uvdal, Kajsa
    Linköping University, Department of Physics, Chemistry and Biology, Molecular Surface Physics and Nano Science. Linköping University, Faculty of Science & Engineering.
    Li, Lin
    Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China.
    Huang, Wei
    Nanjing Tech Univ, Peoples R China; Nanjing Tech Univ, Peoples R China; Northwestern Polytech Univ, Peoples R China.
    Hybrid Rhodamine Fluorophores in the Visible/NIR Region for Biological Imaging2019In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 58, no 40, p. 14026-14043Article, review/survey (Refereed)
    Abstract [en]

    Fluorophores and probes are invaluable for the visualization of the location and dynamics of gene expression, protein expression, and molecular interactions in complex living systems. Rhodamine dyes are often used as scaffolds in biological labeling and turn-on fluorescence imaging. To date, their absorption and emission spectra have been expanded to cover the entire near-infrared region (650-950 nm), which provides a more suitable optical window for monitoring biomolecular production, trafficking, and localization in real time. This review summarizes the development of rhodamine fluorophores since their discovery and provides strategies for modulating their absorption and emission spectra to generate specific bathochromic-shifts. We also explain how larger Stokes shifts and dual-emissions can be obtained from hybrid rhodamine dyes. These hybrid fluorophores can be classified into various categories based on structural features including the alkylation of amidogens, the substitution of the O atom of xanthene, and hybridization with other fluorophores.

  • 45.
    Wu, Tian
    et al.
    Soochow Univ, Peoples R China.
    Li, Junnan
    Soochow Univ, Peoples R China.
    Zou, Yatao
    Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering. Soochow Univ, Peoples R China.
    Xu, Hao
    Soochow Univ, Peoples R China.
    Wen, Kaichuan
    Soochow Univ, Peoples R China; Nanjing Tech Univ Nanjing Tech, Peoples R China; Nanjing Tech Univ Nanjing Tech, Peoples R China.
    Wan, Shanshan
    Soochow Univ, Peoples R China.
    Bai, Sai
    Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Song, Tao
    Soochow Univ, Peoples R China.
    McLeod, John A.
    Soochow Univ, Peoples R China.
    Duhm, Steffen
    Soochow Univ, Peoples R China.
    Gao, Feng
    Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Sun, Baoquan
    Soochow Univ, Peoples R China.
    High-Performance Perovskite Light-Emitting Diode with Enhanced Operational Stability Using Lithium Halide Passivation2020In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 59, no 10, p. 4099-4105Article in journal (Refereed)
    Abstract [en]

    Defect passivation has been demonstrated to be effective in improving the radiative recombination of charge carriers in perovskites, and consequently, the device performance of the resultant perovskite light-emitting diodes (LEDs). State-of-the-art useful passivation agents in perovskite LEDs are mostly organic chelating molecules that, however, simultaneously sacrifice the charge-transport properties and thermal stability of the resultant perovskite emissive layers, thereby deteriorating performance, and especially the operational stability of the devices. We demonstrate that lithium halides can efficiently passivate the defects generated by halide vacancies and reduce trap state density, thereby suppressing ion migration in perovskite films. Efficient green perovskite LEDs based on all-inorganic CsPbBr3 perovskite with a peak external quantum efficiency of 16.2 %, as well as a high maximum brightness of 50 270 cd m(-2), are achieved. Moreover, the device shows decent stability even under a brightness of 10(4) cd m(-2). We highlight the universal applicability of defect passivation using lithium halides, which enabled us to improve the efficiency of blue and red perovskite LEDs.

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  • 46.
    Yang, Biao
    et al.
    Tech Univ Munich, Germany; Tech Univ Munich, Germany.
    Niu, Kaifeng
    Linköping University, Department of Physics, Chemistry and Biology, Materials design. Linköping University, Faculty of Science & Engineering.
    Cao, Nan
    Tech Univ Munich, Germany.
    Grover, Nitika
    Univ Dublin, Ireland.
    Zhao, Wenchao
    Tech Univ Munich, Germany.
    Riss, Alexander
    Tech Univ Munich, Germany.
    Björk, Jonas
    Linköping University, Department of Physics, Chemistry and Biology, Materials design. Linköping University, Faculty of Science & Engineering.
    Auwaerter, Willi
    Tech Univ Munich, Germany.
    Barth, Johannes V.
    Tech Univ Munich, Germany.
    Senge, Mathias O.
    Tech Univ Munich, Germany.
    On-Surface Synthesis of Polyphenylene Wires Comprising Rigid Aliphatic Bicyclo[1.1.1]Pentane Isolator Units2023In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 62, no 19, article id e202218211Article in journal (Refereed)
    Abstract [en]

    Bicyclo[1.1.1]pentane (BCP) motifs are of growing importance to the pharmaceutical industry as sp(3)-rich bioisosteres of benzene rings and as molecular building blocks in materials science. Herein we explore the behavior of 1,3-disubstituted BCP moieties on metal surfaces by combining low-temperature scanning tunneling microscopy / non-contact atomic force microscopy studies with density functional theory modeling. We examine the configuration of individual BCP-containing precursors on Au(111), their supramolecular assembly and thermally activated dehalogenative coupling reactions, affording polymeric chains with incorporated electronically isolating units. Our studies not only provide the first sub-molecular insights of the BCP scaffold behavior on surfaces, but also extend the potential application of BCP derivatives towards integration in custom-designed surface architectures.

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    fulltext
  • 47.
    Yang, Biao
    et al.
    Soochow Univ, Peoples R China; Tech Univ Munich, Germany.
    Niu, Kaifeng
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering. Linköping University, Department of Physics, Chemistry and Biology, Materials design. Soochow Univ, Peoples R China.
    Haag, Felix
    Tech Univ Munich, Germany.
    Cao, Nan
    Soochow Univ, Peoples R China; Tech Univ Munich, Germany.
    Zhang, Junjie
    Soochow Univ, Peoples R China.
    Zhang, Haiming
    Soochow Univ, Peoples R China.
    Li, Qing
    Soochow Univ, Peoples R China.
    Allegretti, Francesco
    Tech Univ Munich, Germany.
    Björk, Jonas
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering. Linköping University, Department of Physics, Chemistry and Biology, Materials design.
    Barth, Johannes V
    Tech Univ Munich, Germany.
    Chi, Lifeng
    Soochow Univ, Peoples R China; Tech Univ Munich, Germany.
    Abiotic Formation of an Amide Bond via Surface-Supported Direct Carboxyl-Amine Coupling2022In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 61, no 5, article id e202113590Article in journal (Refereed)
    Abstract [en]

    Amide bond formation is one of the most important reactions in biochemistry, notably being of crucial importance for the origin of life. Herein, we combine scanning tunneling microscopy and X-ray photoelectron spectroscopy studies to provide evidence for thermally activated abiotic formation of amide bonds between adsorbed precursors through direct carboxyl-amine coupling under ultrahigh-vacuum conditions by means of on-surface synthesis. Complementary insights from temperature-programmed desorption measurements and density functional theory calculations reveal the competition between cross-coupling amide formation and decarboxylation reactions on the Au(111) surface. Furthermore, we demonstrate the critical influence of the employed metal support: whereas on Au(111) the coupling readily occurs, different reaction scenarios prevail on Ag(111) and Cu(111). The systematic experiments signal that archetypical bio-related molecules can be abiotically synthesized in clean environments without water or oxygen.

  • 48.
    Yang, Guanqing
    et al.
    Anhui Univ, Peoples R China.
    Liu, Zhengjie
    Anhui Univ, Peoples R China.
    Zhang, Ruilong
    Anhui Univ, Peoples R China.
    Tian, Xiaohe
    Anhui Univ, Peoples R China.
    Chen, Juan
    Anhui Univ, Peoples R China.
    Han, Guangmei
    Anhui Univ, Peoples R China.
    Liu, Bianhua
    Chinese Acad Sci, Peoples R China.
    Han, Xinya
    Anhui Univ Technol, Peoples R China.
    Fu, Yao
    Univ Sci & Technol China, Peoples R China.
    Hu, Zhang-Jun
    Linköping University, Department of Physics, Chemistry and Biology, Molecular Surface Physics and Nano Science. Linköping University, Faculty of Science & Engineering.
    Zhang, Zhongping
    Anhui Univ, Peoples R China; Chinese Acad Sci, Peoples R China.
    A Multi-responsive Fluorescent Probe Reveals Mitochondrial Nucleoprotein Dynamics with Reactive Oxygen Species Regulation through Super-resolution Imaging2020In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 59, no 37, p. 16154-16160Article in journal (Refereed)
    Abstract [en]

    Understanding the biomolecular interactions in a specific organelle has been a long-standing challenge because it requires super-resolution imaging to resolve the spatial locations and dynamic interactions of multiple biomacromolecules. Two key difficulties are the scarcity of suitable probes for super-resolution nanoscopy and the complications that arise from the use of multiple probes. Herein, we report a quinolinium derivative probe that is selectively enriched in mitochondria and switches on in three different fluorescence modes in response to hydrogen peroxide (H2O2), proteins, and nucleic acids, enabling the visualization of mitochondrial nucleoprotein dynamics. STED nanoscopy reveals that the proteins localize at mitochondrial cristae and largely fuse with nucleic acids to form nucleoproteins, whereas increasing H(2)O(2)level leads to disassociation of nucleic acid-protein complexes.

  • 49.
    Yue, Bingbing
    et al.
    Univ Shanghai Sci & Technol, Peoples R China; Fudan Univ, Peoples R China.
    Jia, Xiaoyong
    Fudan Univ, Peoples R China; Henan Univ, Peoples R China.
    Baryshnikov, Glib
    Linköping University, Department of Science and Technology, Laboratory of Organic Electronics. Linköping University, Faculty of Science & Engineering.
    Jin, Xin
    Wenzhou Med Univ, Peoples R China.
    Feng, Xicheng
    Univ Shanghai Sci & Technol, Peoples R China.
    Lu, Yunle
    Univ Shanghai Sci & Technol, Peoples R China; Fudan Univ, Peoples R China.
    Luo, Mengkai
    Fudan Univ, Peoples R China.
    Zhang, Man
    Fudan Univ, Peoples R China.
    Shen, Shen
    Fudan Univ, Peoples R China.
    ågren, Hans
    Henan Univ, Peoples R China; Uppsala Univ, Sweden.
    Zhu, Liangliang
    Fudan Univ, Peoples R China.
    Photoexcitation-Based Supramolecular Access to Full-Scale Phase-Diagram Structures through in situ Phase-Volume Ratio Phototuning2022In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 61, no 43, article id e202209777Article in journal (Refereed)
    Abstract [en]

    Controlling phase separation and transition plays a core role in establishing and maintaining the function of diverse self-assembled systems. However, it remains challenging to achieve wide-range continuous phase transition for dynamically producing a variety of assembled structures. Here, we developed a far-from-equilibrium system, upon the integration of photoexcitation-induced aggregation molecules and block copolymers, to establish an in situ phase-volume ratio photocontrol strategy. Thus, full-scale phase-diagram structures, from lamellar structure to gyroidal, cylindrical, and finally to a spherical one, can be accessed under different irradiation periods. Moreover, the phase transition was accompanied by considerable aggregation-induced phosphorescence and hydrophilicity/hydrophobicity change for building a functional surface. This strategy allows for a conceptual advance of accessing a wide range of distinct self-assembled structures and functions in real time.

  • 50.
    Zhang, Li
    et al.
    Xiamen Univ, Peoples R China.
    Zhang, Guilan
    Xiamen Univ, Peoples R China.
    Qu, Hang
    Xiamen Univ, Peoples R China.
    Todarwal, Yogesh
    KTH Royal Inst Technol, Sweden.
    Wang, Yun
    Xiamen Univ, Peoples R China.
    Norman, Patrick
    KTH Royal Inst Technol, Sweden.
    Linares, Mathieu
    Linköping University, Department of Physics, Chemistry and Biology, Bioinformatics. Linköping University, Faculty of Science & Engineering.
    Surin, Mathieu
    Univ Mons UMONS, Belgium.
    Zhang, Hui-Jun
    Xiamen Univ, Peoples R China.
    Lin, Jianbin
    Xiamen Univ, Peoples R China.
    Jiang, Yun-Bao
    Xiamen Univ, Peoples R China.
    Naphthodithiophene Diimide Based Chiral pi-Conjugated Nanopillar Molecules2021In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 60, no 46, p. 24543-24548Article in journal (Refereed)
    Abstract [en]

    The synthesis, structures, and properties of [4]cyclonaphthodithiophene diimides ([4]C-NDTIs) are described. NDTIs as important n-type building blocks were catenated in the alpha-positions of thiophene rings via an unusual electrochemical-oxidation-promoted macrocyclization route. The thiophene-thiophene junction in [4]C-NDTIs results in an ideal pillar shape. This interesting topology, along with appealing electronic and optical properties inherited from the NDTI units, endows the [4]C-NDTIs with both near-infrared (NIR) light absorptions, strong excitonic coupling, and tight encapsulation of C-60. Stable orientations of the NDTI units in the nanopillars lead to stable inherent chirality, which enables detailed circular dichroism studies on the impact of isomeric structures on pi-conjugation. Remarkably, the [4]C-NDTIs maintain the strong pi-pi stacking abilities of NDTI units and thus adopt two-dimensional (2D) lattice arrays at the molecular level. These nanopillar molecules have great potential to mimic natural photosynthetic systems for the development of multifunctional organic materials.

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