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  • 1.
    Ballem, Mohamed A.
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Nanostrukturerade material. Linköpings universitet, Tekniska högskolan.
    Zhang, Xuanjun
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad Fysik.
    Johansson, Emma M.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Nanostrukturerade material. Linköpings universitet, Tekniska högskolan.
    Córdoba, José M.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Nanostrukturerade material. Linköpings universitet, Tekniska högskolan.
    Odén, Magnus
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Nanostrukturerade material. Linköpings universitet, Tekniska högskolan.
    Low Temperature Nanocasting of Ultrafine Hematite Nanoparticles using Mesoporous Silica Molds2012Inngår i: Powder Technology, ISSN 0032-5910, E-ISSN 1873-328X, Vol. 217, s. 269-273Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Iron oxide (α-Fe2O3) nanoparticles with very small size, high crystallinity, and narrow size distribution were synthesized by infiltration of Fe(NO3)3.9H2O as an oxide precursor into mesoporous silica (SBA-15 and SBA-16) molds using a wetimpregnation technique. High resolution transmission electron microscopy shows that during the hydrothermal treatment of the precursor at 140 °C for 2 days, stable α-Fe2O3 nanoparticles inside the silica pores are formed. Subsequent leaching out of the silica template by NaOH resulted in well dispersed nanoparticles with an average diameter of ~ 4 nm.

  • 2.
    Chan, Yang-Hsiang
    et al.
    Department of Chemistry, University of Washington, Seattle, USA.
    Gallina, Maria Elena
    Department of Chemistry, University of Washington, Seattle, USA.
    Zhang, Xuanjun
    Department of Chemistry, University of Washington, Seattle, USA.
    Wu, I-Che
    Department of Chemistry, University of Washington, Seattle, USA.
    Jin, Yuhui
    Department of Chemistry, University of Washington, Seattle, USA.
    Sun, Wei
    Department of Chemistry, University of Washington, Seattle, USA.
    Chiu, Daniel T.
    Department of Chemistry, University of Washington, Seattle, USA.
    Reversible Photoswitching of Spiropyran-Conjugated Semiconducting Polymer Dots2012Inngår i: Analytical Chemistry, ISSN 0003-2700, E-ISSN 1520-6882, Vol. 84, nr 21, s. 9431-9438Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Semiconducting polymer dots (Pdots) recently have emerged as a new class of ultrabright fluorescent probes with promising applications in biological detection and imaging. We developed photoswitchable Pdots by conjugating photochromic spiropyran molecules onto poly[9,9-dioctylfluorenyl-2,7-diyl)-co-1,4-benzo-{2,1′-3}-thiadiazole)] (PFBT). The modulation of fluorescence was achieved by ultraviolet irradiation, which converted spiropyran into its visible-absorbing merocyanine form. The merocyanine efficiently quenched the fluorescence of PFBT via Förster resonance energy transfer (FRET). We then reversed the quenching by subsequent irradiation with visible light to get back the fluorescence of PFBT. This FRET-based photomodulation of Pdot fluorescence could be repeated multiple times. We next conjugated biomolecules onto the surface of these photoswitchable Pdots and demonstrated their specific cellular and subcellular labeling to different types of cells without any noticeable nonspecific binding. We anticipate these photoswitchable and biocompatible Pdots will be useful in developing bioimaging techniques in the future.

  • 3.
    Chan, Yang-Hsiang
    et al.
    Department of Chemistry, University of Washington, Seattle, USA.
    Ye, Fangmao
    Department of Chemistry, University of Washington, Seattle, USA.
    Gallina, Maria Elena
    Department of Chemistry, University of Washington, Seattle, USA.
    Zhang, Xuanjun
    Department of Chemistry, University of Washington, Seattle, USA.
    Jin, Yuhui
    Department of Chemistry, University of Washington, Seattle, USA.
    Wu, I-Che
    Department of Chemistry, University of Washington, Seattle, USA.
    Chiu, Daniel T
    Department of Chemistry, University of Washington, Seattle, USA.
    Hybrid Semiconducting Polymer Dot-Quantum Dot with Narrow-Band Emission, Near-Infrared Fluorescence, and High Brightness2012Inngår i: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 134, nr 17, s. 7309-7312Artikkel i tidsskrift (Fagfellevurdert)
  • 4.
    Ding, Aixiang
    et al.
    Anhui University, Peoples R China.
    Yang, Longmei
    Anhui University, Peoples R China.
    Zhang, Yuyang
    Anhui University, Peoples R China.
    Zhang, Gaobin
    Anhui University, Peoples R China.
    Kong, Lin
    Anhui University, Peoples R China.
    Zhang, Xuanjun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan.
    Tian, Yupeng
    Anhui University, Peoples R China; Shandong University, Peoples R China.
    Tao, Xutang
    Shandong University, Peoples R China.
    Yang, Jiaxiang
    Anhui University, Peoples R China; Shandong University, Peoples R China .
    Complex-Formation-Enhanced Fluorescence Quenching Effect for Efficient Detection of Picric Acid2014Inngår i: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 20, nr 38, s. 12215-12222Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Amine-functionalized alpha-cyanostilbene derivatives (Z)-2-(4-aminophenyl)-3-(4-butoxyphenyl) acrylonitrile (ABA) and (Z)-3-(4-butoxyphenyl)-2-[4-(butylamino) phenyl] acrylonitrile (BBA) were designed for specific recognition of picric acid (PA), an environmental and biological pollutant. The 1:1 host-guest complexes formed between the chemosensors and PA enhanced fluorescence quenching, thus leading to sensitive and selective detection in aqueous media and the solid phase.

  • 5.
    Dong, Suzi
    et al.
    Department of Chemistry, National University of Singapore.
    Fan, HM
    Department of Physics, National University of Singapore.
    Zhang, Xuanjun
    Department of Chemistry, National University of Singapore.
    Loh, Kian Ping
    Department of Chemistry, National University of Singapore.
    Cheng, C-L
    Department of Physics, National Dong Hwa University.
    SOW, CH
    Department of Physics, National University of Singapore.
    Foo, YL
    Institute of Materials Research and Engineering, Singapore.
    An effective surface-enhanced Raman scattering template based on a Ag nanocluster–ZnO nanowire array2009Inngår i: Nanotechnology, ISSN 0957-4484, E-ISSN 1361-6528, Vol. 20, nr 17, s. 175705-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    An effective surface-enhanced Raman scattering (SERS) template based on a 3D hybrid Ag nanocluster (NC)-decorated ZnO nanowire array was fabricated through a simple process of depositing Ag NCs on ZnO nanowire arrays. The effects of particle size and excitation energy on the Raman scattering in these hybrid systems have been investigated using rhodamine 6G as a standard analyte. The results indicate that the hybrid nanosystem with 150 nm Ag NCs produces a larger SERS enhancement factor of 3.2 × 108, which is much higher than that of 10 nm Ag NCs (6.0 × 106) under 532 nm excitation energy. The hybrid nanowire arrays were further applied to obtain SERS spectra of the two-photon absorption (TPA) chromophore T7. Finite-difference time-domain simulations reveal the presence of an enhanced field associated with inter-wire plasmon coupling of the 150 nm Ag NCs on adjacent ZnO nanowires; such a field was absent in the case of the 10 nm Ag NC-coated ZnO nanowire. Such hybrid nanosystems could be used as SERS substrates more effectively than assembled Ag NC film due to the enhanced light-scattering local field and the inter-wire plasmon-enhanced electromagnetic field.

  • 6.
    Hao, Fuying
    et al.
    Department of Chemistry, Anhui University, China.
    Zhang, Xuanjun
    Department of Chemistry, Anhui University, China.
    Hu, Hanmei
    Department of Chemistry, Anhui University, China.
    Zhang, Mingliang
    Department of Chemistry, Anhui University, China.
    Tian, Yupeng
    Department of Chemistry, Anhui University, China.
    Synthesis and characterizations of 4-[(N-Hydroxyethyl-N-Methyl) amino] benzaldehyde thiosemicarbazone and its complexes with transition metals2001Inngår i: Chinese journal of inorganic chemistry, ISSN 1001-4861, Vol. 17, nr 4, s. 496-500Artikkel i tidsskrift (Fagfellevurdert)
  • 7.
    Hao, Fuying
    et al.
    Department of Chemistry, Anhui University, China.
    Zhang, Xuanjun
    Department of Chemistry, Anhui University, China.
    Tian, Yupeng
    Department of Chemistry, Anhui University, China.
    Zhou, Hongping
    Department of Chemistry, Anhui University, China.
    Li, Lin
    Department of Chemistry, Anhui University, China.
    Wu, Jieying
    Department of Chemistry, Anhui University, China.
    Zhang, Shengyi
    Department of Chemistry, Anhui University, China.
    Yang, Jiaxiang
    Department of Chemistry, Anhui University, China.
    Jin, Baokang
    Department of Chemistry, Anhui University, China.
    Tao, Xutang
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Zhou, Guangyong
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Jiang, Minhua
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Design, crystal structures and enhanced frequency-upconverted lasing efficiencies of a new series of dyes from hybrid of inorganic polymers and organic chromophores2009Inngår i: Journal of Materials Chemistry, ISSN 0959-9428, E-ISSN 1364-5501, Vol. 19, nr 48, s. 9163-9169Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A new series of hybrid dyes, trans-4-(4′-N,N-dialkylaminostyryl)-N-methyl pyridinium [Cd(SCN)3]n [alkyl = Me(1), Et(2), Pr(3) and n–Bu(4)] have been successfully synthesized from hybrids of inorganic polymers and organic chromophores. The structures of four new hybrid dyes were characterized by single-crystal X-ray diffraction first. The particular features of the hybrid dyes are (1) the inorganic anions form isolated polymeric one-dimensional zig-zag chains of [Cd(SCN)3]n with an extended π-conjugation system within the polymeric –[M–S–C≡N]–M… chain and high polarizabilities; and (2) the organic cationic chromophores determine their optical properties. Experimental results revealed that the TPA cross-section values and overall energy conversion efficiencies of hybrid dyes with different alkyl pendant groups have obviously increased from 1 to 4, and in particular, have been substantially enhanced compared to their corresponding iodide analogues 1′4′. Therefore, we speculate that such increases are attributable to arrangements of infinite anionic [Cd(SCN)3]n chains and synergic effects with chromophore cations.

  • 8.
    Hu, Hanmei
    et al.
    Structure Research Laboratory, Department of Chemistry, University of Science and Technology of China.
    Mo, Maosong
    Structure Research Laboratory, Department of Chemistry, University of Science and Technology of China.
    Yang, Baojun
    Structure Research Laboratory, Department of Chemistry, University of Science and Technology of China.
    Zhang, Xuanjun
    Structure Research Laboratory, Department of Chemistry, University of Science and Technology of China.
    Li, Qiaowei
    Structure Research Laboratory, Department of Chemistry, University of Science and Technology of China.
    Yu, Wechao
    Structure Research Laboratory, Department of Chemistry, University of Science and Technology of China.
    Qian, Yitai
    Structure Research Laboratory, Department of Chemistry, University of Science and Technology of China.
    Solvothermal synthesis of Sb2S3 nanowires on a large scale2003Inngår i: Journal of Crystal Growth, ISSN 0022-0248, E-ISSN 1873-5002, Vol. 258, nr 1-2, s. 106-112Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Sb2S3 nanowires with high aspect ratios have been successfully prepared on a large scale using SbCl3 and Na2S as starting materials in ethylene glycol at 200°C for 10 h. Field emission scanning electron microscopy images and transmission electron microscopy images show that the nanowires have diameters in the range of 20–100 nm and lengths up to 50 μm. Diffuse reflection spectrum indicates that the as-prepared Sb2S3 nanowires have obvious quantum size effects. The effects of reaction parameters on the growth of nanowires were discussed. A possible mechanism on the formation of the Sb2S3 nanowires was proposed.

  • 9.
    Hu, Jiwen
    et al.
    Tongji University, Peoples R China.
    Hu, Zhang-Jun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan. Tongji University, Peoples R China.
    Cui, Yang
    Tongji University, Peoples R China.
    Zhang, Xuanjun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan.
    Gao, Hong-Wen
    Tongji University, Peoples R China.
    Uvdal, Kajsa
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan.
    A rhodamine-based fluorescent probe for Hg2+ and its application for biological visualization2014Inngår i: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 203, s. 452-458Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A new visible light excitable fluorescent probe (1) is synthesized by appending a hydroxymethyl-pyridine to rhodamine B hydrazide. The probe displays very specific Hg2+-induced colour change and fluorescent enhancement in the aqueous systems. The "turn-on" response of fluorescence is based on a binding-induced ring-opening process from the spirolactam (nonfluorescent) to acyclic xanthene (fluorescent) in rhodamine B. The coordinating atoms O-center dot-N-N-O-center dot from the hydroxymethyl-pyridine and rhodamine B hydrazide play dominant role in the formation of a complex with 1:1 stoichiometry of Hg2+ to 1. It exhibits a linear response in the range of 0.1-5 mu M with the limit of detection (LOD) of 15.7 nM (3 sigma/slope), while the calculated value of the association constant of Hg2+/1 is 0.70 x 10(5) M-1. Furthermore, confocal microscopy imaging experiment demonstrates the probe 1 can be applied as a fluorescent probe for visualization of Hg2+ in living HeLa cells.

  • 10.
    Hu, Zhangjun
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Ahrén, Maria
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Selegård, Linnéa
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Skoglund, Caroline
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Söderlind, Fredrik
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Engström, Maria
    Linköpings universitet, Centrum för medicinsk bildvetenskap och visualisering, CMIV. Linköpings universitet, Institutionen för medicin och hälsa, Avdelningen för radiologiska vetenskaper. Linköpings universitet, Hälsouniversitetet.
    Zhang, Xuanjun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Uvdal, Kajsa
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Highly Water-Dispersible Surface-Modified Gd2O3 Nanoparticles for Potential Dual-Modal Bioimaging2013Inngår i: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 19, nr 38, s. 12658-12667Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Water-dispersible and luminescent gadolinium oxide (GO) nanoparticles (NPs) were designed and synthesized for potential dual-modal biological imaging. They were obtained by capping gadolinium oxide nanoparticles with a fluorescent glycol-based conjugated carboxylate (HL). The obtained nanoparticles (GO-L) show long-term colloidal stability and intense blue fluorescence. In addition, L can sensitize the luminescence of europium(III) through the so-called antenna effect. Thus, to extend the spectral ranges of emission, europium was introduced into L-modified gadolinium oxide nanoparticles. The obtained Eu-III-doped particles (Eu:GO-L) can provide visible red emission, which is more intensive than that without L capping. The average diameter of the monodisperse modified oxide cores is about 4nm. The average hydrodynamic diameter of the L-modified nanoparticles was estimated to be about 13nm. The nanoparticles show effective longitudinal water proton relaxivity. The relaxivity values obtained for GO-L and Eu:GO-L were r(1)=6.4 and 6.3s(-1)mM(-1) with r(2)/r(1) ratios close to unity at 1.4T. Longitudinal proton relaxivities of these nanoparticles are higher than those of positive contrast agents based on gadolinium complexes such as Gd-DOTA, which are commonly used for clinical magnetic resonance imaging. Moreover, these particles are suitable for cellular imaging and show good biocompatibility.

  • 11.
    Hu, Zhang-Jun
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan. Tongji University, Shanghai, China .
    Hu, Jiwen
    Tongji University, Shanghai, China .
    Cui, Yang
    Tongji University, Shanghai, China .
    Wang, Guannan
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan.
    Zhang, Xuanjun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan.
    Uvdal, Kajsa
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan.
    Gao, Hong-Wen
    Tongji University, Shanghai, China .
    A facile "click" reaction to fabricate a FRET-based ratiometric fluorescent Cu2+ probe2014Inngår i: Journal of materials chemistry. B, ISSN 2050-750X, E-ISSN 2050-7518, Vol. 2, nr 28, s. 4467-4472Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A facile one-step Cu(I)-catalyzed "click" reaction, between a dansyl-azide and a propargyl-substituted rhodamine B hydrazide, is employed to fabricate a novel FRET ratiometric "off-on" fluorescent probe. The sensitive emission of the donor, a dansyl group, overlaps perfectly with the absorption of the acceptor, xanthene in the open-ring rhodamine. The proposed probe shows high selectivity towards Cu2+. The ratio of emission intensities at 568 and 540 nm (I-568/I-540) exhibits a drastic 28-fold enhancement upon addition of Cu2+. The probe shows an excellent linear relationship between emission ratios and the concentrations of Cu2+ from 10 to 50 mu M, with a detection limit (S/N = 3) of 0.12 mu M. The preliminary cellular studies demonstrated that the probe is cell membrane permeable and could be applied for ratiometric fluorescence imaging of intracellular Cu2+ with almost no cytotoxicity. The ingenuity of the probe design is to construct a FRET donor-acceptor interconnector and a selective receptor simultaneously by "click" reaction. The strategy was verified to have great potential for developing novel FRET probes for Cu2+.

  • 12.
    Li, Shengli
    et al.
    Department of Chemistry, Anhui University, China.
    Wu, Jieying
    Department of Chemistry, Anhui University, China.
    Zhang, Xuanjun
    Department of Chemistry, Anhui University, China.
    Tian, Yupeng
    Department of Chemistry, Anhui University, China.
    Jiang, Minhua
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Chen, Zuyao
    Department of Applied Chemistry, University of Science and Technology of China.
    Usman, Anwar
    X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia.
    Fun, Hoong-Kun
    X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia.
    Formation of a Novel Polymeric Cadmium(II) Complex Bridged by Sulfur and Thiocyanato Ions2003Inngår i: Chemistry Letters, ISSN 0366-7022, E-ISSN 1348-0715, Vol. 32, nr 8, s. 748-749Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The title complex, {[N(CH3)4]2[Cd(SCN)2S]}n, was prepared by self-assembling from the reaction of a methanol/water (volume ratio, 1/1) solution containing cadmium(II) thiocyanate with equivalent amount of tetramethylammonium thiocyanate. The result of single X-ray determination for the complex reveals that a novel polymeric cadmium(II) complex bridged by sulfur and thiocyanato ions was obtained, which formed a two-dimensional (2D) structure.

  • 13.
    Liu, Zhao-Di
    et al.
    Department of Chemistry, Anhui University, China.
    Zhang, Xuanjun
    Department of Chemistry, Anhui University, China.
    Wu, Jie-Ying
    Department of Chemistry, Anhui University, China.
    Hao, Fuying
    Department of Chemistry, Anhui University, China.
    Zhou, Hong-ping
    Department of Chemistry, Anhui University, China.
    Tian, Yu-Peng
    Department of Chemistry, Anhui University, China.
    Influence of the central metal on the crystal structures and electronic structures of biferrocene trinuclear complexes2011Inngår i: Polyhedron, ISSN 0277-5387, E-ISSN 1873-3719, Vol. 30, nr 2, s. 279-283Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Five metal-bridged biferrocene complexes of the Schiff-base ligand (HL = S-benzyl-N-(ferrocenyl-1-methyl-methylidene)dithiocarbazate) have been studied by single crystal X-ray diffraction and 57Fe Mössbauer spectroscopy. The crystal structures of the complexes show that the central metal ions are tetra-coordinated by two ligands in two modes: the central d8 transition metal ions (Ni2+, Pd2+, and Pt2+) are nearly square-planar coordinated and the d10 transition metal ions (Zn2+ and Cd2+) are tetrahedrally coordinated. Interestingly, the isomer shifts in 57Fe Mössbauer spectroscopy are also of two kinds: d8 transition metal ions (0.097–0.247 mm/s) and d10 transition metal ions (0.416–0.435 mm/s).

  • 14.
    Raj, S. Shanmuga Sundara
    et al.
    X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia.
    Fun, Hoong-Kun
    X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia.
    Zhang, Xuanjun
    Department of Chemistry, Anhui University, China.
    Tian, Yupeng
    Department of Chemistry, Anhui University, China.
    Xie, fuxin
    Department of Chemistry, Anhui University, China.
    Ma, Jilong
    Department of Chemistry, Anhui University, China.
    4-(N-Hydroxyethyl -N-methylamino)-benzaldehyde thiosemicarbazone2000Inngår i: Acta Crystallographica Section C: Crystal Structure Communications, ISSN 0108-2701, E-ISSN 1600-5759, Vol. c56, s. 1238-1239Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In the crystal structure of the title compound, C11H16N4OS, the phenyl ring and the thiosemicarbazone moiety from a dihedral angle of 7.7 (1)°. The crystal structure is governed by N-H...O and O-H...S hydrogen bonds leading to the formation of a two-dimensional network.

  • 15.
    Rong, Yu
    et al.
    University of Washington, WA USA .
    Wu, Changfeng
    Jilin University, Peoples R China .
    Yu, Jiangbo
    University of Washington, WA USA .
    Zhang, Xuanjun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Ye, Fangmao
    University of Washington, WA USA .
    Zeigler, Maxwell
    University of Washington, WA USA .
    Gallina, Maria Elena
    University of Washington, WA USA .
    Wu, I-Che
    University of Washington, WA USA .
    Zhang, Yong
    University of Washington, WA USA .
    Chan, Yang-Hsiang
    University of Washington, WA USA .
    Sun, Wei
    University of Washington, WA USA .
    Uvdal, Kajsa
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Chiu, Daniel T.
    University of Washington, WA USA .
    Multicolor Fluorescent Semiconducting Polymer Dots with Narrow Emissions and High Brightness2013Inngår i: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 7, nr 1, s. 376-384Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Fluorescent semiconducting polymer dots (Pdots) have attracted great interest because of their superior characteristics as fluorescent probes, such as high fluorescence brightness, fast radiative rates, and excellent photostability. However, currently available Pdots generally exhibit broad emission spectra, which significantly limit their usefulness in many biological applications Involving multiplex detections. Here, we describe the design and development of multicolor narrow emissive Pdots based on different boron dipyrromethene (BODIPY) units. BODIPY-containing semiconducting polymers emitting at multiple wavelengths were synthesized and used as precursors for preparing the Pdots, where intraparticle energy transfer led to highly bright, narrow emissions. The emission full width at half-maximum of the resulting Pdots varies from 40 to 55 nm, which is 15-2 times narrower than those of conventional semiconducting polymer dots. BODIPY 520 Pdots were about an order of magnitude brighter than commercial Qdot 525 under identical laser excitation conditions. Fluorescence imaging and flow cytometry experiments indicate that the narrow emissions from these bright Pdots are promising for multiplexed biological detections.

  • 16.
    Rong, Yu
    et al.
    University of Washington, Seattle, USA.
    Yu, Jianzho
    University of Washington, Seattle, USA.
    Zhang, Xuanjun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan.
    Sun, Wei
    University of Washington, Seattle, USA.
    Ye, Fangmao
    University of Washington, Seattle, USA.
    Wu, I-Che
    University of Washington, Seattle, USA.
    Zhang, Yong
    University of Washington, Seattle, USA.
    Hayden, Sarah
    University of Washington, Seattle, USA.
    Zhang, Yue
    University of Washington, Seattle, USA.
    Wu, Changfeng
    Jilin University, Changchun, China.
    Chiu, Daniel T.
    University of Washington, Seattle, USA.
    Yellow Fluorescent Semiconducting Polymer Dots with High Brightness, Small Size, and Narrow Emission for Biological Applications2014Inngår i: ACS Macro Letters, ISSN 2161-1653, Vol. 3, nr 10, s. 1051-1054Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Cross-linked polymer dots with intense and narrow yellow emission were designed using boron-dipyrromethene (BODIPY) polymer as the acceptor and poly[9,9-dioctylfluorenyl-2,7-diyl-co-1,4-benzo-{2,1-3}-thiadiazole] (PFBT) polymer as the donor. The emission fwhms of the polymer dots (Pdots) were 37 nm. CL-BODIPY 565 Pdots were about S times brighter than commercial quantum dots (Qdots) 565 under identical experimental conditions. Specific cellular targeting indicated that the small, bright, and narrow emissive CL-BODIPY 565 Pdots are promising probes for biological applications.

  • 17.
    Sun, Kai
    et al.
    Jilin University, Changchun, China.
    Chen, Haobin
    Jilin University, Changchun, China.
    Wang, Lei
    Jilin University, Changchun, China.
    Yin, Shengyan
    Jilin University, Changchun, China.
    Wang, Haiyu
    Jilin University, Changchun, China.
    Xu, Gaixia
    Shenzhen University, China .
    Chen, Danni
    Shenzhen University, China .
    Zhang, Xuanjun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan.
    Wu, Changfeng
    Jilin University, Changchun, China.
    Qin, Weiping
    Jilin University, Changchun, China.
    Size-Dependent Property and Cell Labeling of Semiconducting Polymer Dots2014Inngår i: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 6, nr 13, s. 10802-10812Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Semiconducting polymer dots (Pdots) represent a new class of fluorescent nanoparticles for biological applications. In this study, we investigated their size-dependent fluorescence and cellular labeling properties. We demonstrate that the polymer conformation in solution phase largely affects the polymer folding and packing during the nanoparticle preparation process, resulting in solution-phase control over the fluorescence properties of semiconducting polymer nanoparticles. The resulting Pdots exhibit apparent size dependent absorption and emission, a characteristic feature of different chain packing behaviors due to the preparation conditions. Single-particle fluorescence imaging was employed to perform a side-by-side comparison on the Pdot brightness, indicating a quadratic dependence of single-particle brightness on particle size. Upon introducing a positively charged dye Nile blue, all the three type of Pdots were quenched very efficiently (K-sv greater than 1 x 10(7) M-1) in an applied quenching process at low dye concentrations, but exhibit apparent difference in quenching efficiency with increasing dye concentration. Furthermore, Pdots of different sizes were used for cell uptake and cellular labeling involving biotin-streptavidin interactions. Fluorescence imaging together with flow cytometry studies clearly showed size dependent labeling brightness. Small-sized Pdots appear to be more effective for immunolabeling of cell surface, whereas medium-sized Pdots exhibit the highest uptake efficiency. This study provides a concrete guidance for selecting appropriate particle size for biological imaging and sensing applications.

  • 18.
    Tian, Yu-peng
    et al.
    Department of Chemistry, Anhui University, China.
    Zhang, Ming-liang
    Department of Chemistry, Anhui University, China.
    Hu, Zhang-Jun
    Department of Chemistry, Anhui University, China.
    Hu, Han-mei
    Department of Chemistry, Anhui University, China.
    Wu, Jie-Ying
    Department of Chemistry, Anhui University, China.
    Zhang, Xuanjun
    Department of Chemistry, Anhui University, China.
    Zhang, Sheng-YI
    Department of Chemistry, Anhui University, China.
    Tao, Xutang
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Jiang, Minhua
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Chen, He-ping
    Department of Physics, Anhui University, China.
    Chantrapromma, Suchada
    Crystallography Unit, School of Physics, Universiti Sain Malaysia.
    Fun, Hoong-Kun
    Crystallography Unit, School of Physics, Universiti Sain Malaysia.
    Synthesis, crystal structure and NLO properties of a novel ruthenium(II) complex with unusual coordination mode2005Inngår i: Transition metal chemistry (Weinheim), ISSN 0340-4285, E-ISSN 1572-901X, Vol. 30, nr 7, s. 778-785Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A new Schiff base 4-[N-hydroxyethyl-N-(methyl)amino]benzaldehyde S-methyl dithiocarbazate (HL, where H is a dissociable proton) and the ruthenium complex [Ru(bpy)2L]PF6 (bpy = 2,2′-bipyridine) have been synthesized. The structural determinations of the ligand and its ruthenium complex, by X-ray crystallography, show that the ligand is coordinated as a monoanionic bidentate N, S-donor, forming a four-member chelate ring with a bite angle of 65.91°. The complex shows intense MLCT transitions in the visible region. Fluorescent and electrochemical properties have been also studied. The complex in DMF solution exhibited a strong two-photon absorption (t.p.a.) at 532 nm nanosecond laser pulses. The t.p.a. coefficient β, t.p.a. cross-section σ and the third-order optical nonlinearity χ(3) of the complex and the ligand have been determined by the Z-scan technique.

  • 19.
    Tian, Yupeng
    et al.
    Department of Chemistry, Anhui university, China.
    Zhang, Mingliang
    Department of Chemistry, Anhui university, China.
    Yu, Xiaoqiang
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Xu, Guibao
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Ren, Yan
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Yang, Jiaxiang
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Wu, Jieying
    Department of Chemistry, Anhui university, China.
    Zhang, Xuanjun
    Department of Chemistry, Anhui university, China.
    Tao, Xutang
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Zhang, Shengyi
    Department of Chemistry, Anhui university, China.
    Jiang, Minhua
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Two novel two-photon polymerization initiators with extensive application prospects2004Inngår i: Chemical Physics Letters, ISSN 0009-2614, E-ISSN 1873-4448, Vol. 388, nr 4-6, s. 325-329Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Two novel two-photon polymerization initiators, 10-ethyl-3-E-(4-(N,N-di-n-butylamino)styryl)phenothiazine 5 and 10-ethyl-3,7-E,E-bis(4-(N,N-di-n-butyl amino)styryl)phenothiazine 6, have been efficiently synthesized with room temperature solid phase Wittig reaction. Two initiators were found to exhibit good single-photon fluorescence emission and their quantum yields, lifetimes and solvent effects have been studied in detail. Two-photon fluorescence spectra were investigated under 800 nm fs laser pulse and two-photon absorption (TPA) cross-sections of the initiators have been evaluated by theoretical calculation.Two-photon initiating polymerization microfabrication experiments have been carried out and artificial defects were made and polymerization mechanism was also discussed.

  • 20.
    Tian, Yupeng
    et al.
    Department of Chemistry, Anhui University, China.
    Zhang, Xuanjun
    Department of Chemistry, Anhui University, China.
    Wu, Jieying
    Department of Chemistry, Anhui University, China.
    Fun, Hoong-Kun
    X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia.
    Jiang, Minhua
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Xu, Zhiqiang
    Department of Chemistry, Memorial University of Newfoundland, Canada.
    Usman, Anwar
    X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia.
    Chantraprommay, Suchada
    X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia.
    Thompson, Laurence K.
    Department of Chemistry, Memorial University of Newfoundland. Canada.
    Structural diversity and properties of a series of dinuclear and mononuclear copper(II) and copper(I) carboxylato complexes2002Inngår i: New Journal of Chemistry, ISSN 1144-0546, E-ISSN 1369-9261, Vol. 26, nr 10, s. 1468-1473Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The syntheses, crystal structures, magnetic and photoluminescence properties of a series of dinuclear and mononuclear copper(II) and copper(I)N-carbazolylacetate [N-carbazolylacetic acid=Hcabo] with different carboxylato coordination modes are reported. Although the carboxylato group has different coordination modes, the same carboxylate ligand binding to copper ion via four coordinating modes is rare. The crystal structure of complex [Cu2(Cabo)4(dmf)2]·2dmf (1) consists of a symmetrical dimeric Cu(II) carboxylato paddle-wheel core and oxygen atoms from dmf at the apical positions. The dinuclear complex [Cu2(Cabo)3(phen)2]ClO4·H2O·C2H5OH (2) (phen=1,10-phenanthroline) consists of an unusual dimeric core with two copper atoms bridged by three carboxylates one of which is in the η∶η∶μ2 bridging mode and the other two are in the rarer monoatomic bridging mode. To our knowledge, the present bridging mode has not been reported hitherto. Magnetic susceptibilities were measured in the temperature range 2–300 K. It is found that paddle-wheel copper(II) ions in 1 are strongly coupled antiferromagnetically with 2J=−356.4(6) cm−1, whereas complex 2 shows weak antiferromagnetic interaction with a 2J value of −12.8(4) cm−1. Copper(I)N-carbazolylacetate with strong fluorescence in the solid state as well as high thermal stability was obtained by reduction of the copper(II)N-carbazolylacetate using PPh3(triphenylphosphine) in dmf solution.

  • 21.
    Wang, Guannan
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan. Liaoning Medical University, Jinzhou, China .
    Zhang, Xuanjun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Skallberg, Andreas
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Liu, Yaxu
    Liaoning Medical University, Peoples R China Liaoning Medical University, Peoples R China .
    Hu, Zhang-Jun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Mei, Xifan
    Liaoning Medical University, Peoples R China .
    Uvdal, Kajsa
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    One-step synthesis of water-dispersible ultra-small Fe3O4 nanoparticles as contrast agents for T-1 and T-2 magnetic resonance imaging2014Inngår i: Nanoscale, ISSN 2040-3364, E-ISSN 2040-3372, Vol. 6, nr 5, s. 2953-2963Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Uniform, highly water-dispersible and ultra-small Fe3O4 nanoparticles were synthesized via a modified one-step coprecipitation approach. The prepared Fe3O4 nanoparticles not only show good magnetic properties, long-term stability in a biological environment, but also exhibit good biocompatibility in cell viability and hemolysis assay. Due to the ultra-small sized and highly water-dispersibility, they exhibit excellent relaxivity properties, the 1.7 nm sized Fe3O4 nanoparticles reveal a low r(2)/r(1) ratio of 2.03 (r(1) = 8.20 mM(-1) s(-1), r(2) = 16.67 mM(-1) s(-1)); and the 2.2 nm sized Fe3O4 nanoparticles also appear to have a low r2/r1 ratio of 4.65 (r(1) = 6.15 mM(-1) s(-1), r(2) = 28.62 mM(-1) s(-1)). This demonstrates that the proposed ultra-small Fe3O4 nanoparticles have great potential as a new type of T-1 magnetic resonance imaging contrast agents. Especially, the 2.2 nm sized Fe3O4 nanoparticles, have a competitive r(1) value and r(2) value compared to commercial contrasting agents such as Gd-DTPA (r(1) = 4.8 mM(-1) s(-1)), and SHU-555C (r(2) = 69 mM(-1) s(-1)). In vitro and in vivo imaging experiments, show that the 2.2 nm sized Fe3O4 nanoparticles exhibit great contrast enhancement, long-term circulation, and low toxicity, which enable these ultrasmall sized Fe3O4 nanoparticles to be promising as T-1 and T-2 dual contrast agents in clinical settings.

  • 22.
    Wang, Wenjing
    et al.
    Fujian Normal University.
    Chen, Qianhuo
    Fujian Normal University.
    Li, Qing
    Fujian Normal University.
    Sheng, Yu
    Fujian Normal University.
    Zhang, Xuanjun
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap.
    Uvdal, Kajsa
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Ligand-Structure Effect on the Formation of One-Dimensional Nanoscale Cu(II)-Schiff Base Complexes and Solvent-Mediated Shape Transformation2012Inngår i: Crystal Growth & Design, ISSN 1528-7483, E-ISSN 1528-7505, Vol. 12, nr 5, s. 2707-2713Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We report here a Cu(II)-Schiff base complex that can assemble into one-dimensional (1D) nanoscale fibers, belts, and rods under different synthetic conditions. The ligand-structure effect is investigated by modification of the ligand structure. The formation of a ID nanostructure was studied, and the formation of dimers was revealed as a key factor for 1D assembly. In dimethylformamide (DMF) medium, this complex represents one of the rare examples of low-molecular-weight "super-metallogelators" with a critical gelation concentration of 0.3 wt % for DMF. The ligand exhibits good selectivity toward different metal ions in terms of gel formation and only the Cu(II) complex forms gels. It is interesting that this metallogel is a kind of dynamic nanostructure, which can be transformed to rods with different aspect ratios via a solvent-mediated process under stimulation of ultrasound.

  • 23.
    Wu, Jie-Ying
    et al.
    Department of Chemistry, Anhui University, China.
    Pan, Yue-LI
    Department of Chemistry, Anhui University, China.
    Zhang, Xuanjun
    Department of Chemistry, Anhui University, China.
    Sun, Tao
    Department of Chemistry, Anhui University, China.
    Tian, Yupeng
    Department of Chemistry, Anhui University, China.
    Yang, Jiaxiang
    Department of Chemistry, Anhui University, China.
    Chen, Zhong-Ning
    Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, China.
    Synthesis, photoluminescence and electrochemical properties of a series of carbazole-functionalized ligands and their silver(I) complexes2007Inngår i: Inorganica Chimica Acta, ISSN 0020-1693, E-ISSN 1873-3255, Vol. 360, nr 6, s. 2083-2091Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A series of carbazole-functionalized carboxylate ligands (N-carbazolylacetic acid (L1), 4-carbazol-9-yl-benzoic acid (L2), and 3-(4-carbazol-9-yl-phenyl)-acrylic acid (L3)) and their corresponding silver complexes were designed and synthesized and the structures were determined by single crystal X-ray diffractions. The silver atoms in the complexes are in tetrahedral geometry coordinated with two oxygen from carboxylic and two phosphorous atoms from triphenylphosphine. The complexes exhibit excellent electrochemical characters in solution and strong photoluminescence in the solid state. The emission wavelengths of the compounds can be tuned (from ultraviolet to visible region) by introducing of the second coordinating ligand triphenylphosphine and by elongation of the conjugation moieties.

  • 24.
    Xie, Zhibin
    et al.
    Department of Materials Science and Engineering, National University of Singapore.
    Midya, Anupam
    Department of Chemistry, National University of Singapore.
    Loh, Kian Ping
    Department of Chemistry, National University of Singapore.
    Adams, Stefan
    Department of Materials Science and Engineering, National University of Singapore.
    Blackwood, Daniel John
    Department of Materials Science and Engineering, National University of Singapore.
    Wang, John
    Department of Materials Science and Engineering, National University of Singapore.
    Zhang, Xuanjun
    Department of Chemistry, National University of Singapore.
    Chen, Zhikuan
    Institute of Materials Research & Engineering, 3 Research Link, Singapore.
    Highly efficient dye-sensitized solar cells using phenothiazine derivative organic dyes2010Inngår i: Progress in Photovoltaics, ISSN 1062-7995, E-ISSN 1099-159X, Vol. 18, nr 8, s. 573-581Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Two novel organic dyes have been synthesized using electron rich phenothiazine as electron donors and oligothiophene vinylene as conjugation spacers. The two dyes (2E)-2-cyano-3-(5-(5-((E)-2-(10-(2-ethylhexyl)-10H-phenothiazin-7-yl)vinyl)thiophen-2-yl)thiophen-2-yl)acrylic acid (PTZ-1) and (2E)-3-(5-(5-(4,5-bis((E)-2-(10-(2-ethylhexyl)-10H-phenothiazin-3-yl)vinyl)thiophen-2-yl)thiophen-2-yl)thiophen-2-yl)-2-cyanoacrylic acid (PTZ-2) were fully characterized and employed in dye-sensitized solar cells (DSCs) to explore the effect of disubstituted donors on photovoltaic (PV) performance. The solar cells sensitized by the PTZ1 dye have a high IPCE plateau of 80% and achieve a short-circuit photocurrent density of 12.98 mA/cm2, an open-circuit voltage of 0.713 V, and a fill factor (ff) of 66.6%, corresponding to a conversion efficiency of 6.17% under AM 1.5 100 mW/cm2 illumination. The different performance of the solar cells based on the two dyes can be understood from the studies of the electron kinetics by electrochemical impedance spectroscopy (EIS). These investigations reveal that disubstituted donors in the organic sensitizers of three or more conjugation units deteriorate the PV performance due to enhanced recombination.

  • 25.
    Xue, Zhaoming
    et al.
    Department of Chemistry, Anhui University, China.
    Zhang, Xuanjun
    Department of Chemistry, Anhui University, China.
    Tian, Yupeng
    Department of Chemistry, Anhui University, China.
    Spectroscopic studies and theoretical calculations on a series of phenothiazine derivatives as EL materials2002Inngår i: Chinese journal of atomic and molecular physics, Vol. 19, s. 307-312Artikkel i tidsskrift (Fagfellevurdert)
  • 26.
    Xue, Zhaoming
    et al.
    Department of Chemistry, Anhui University, China.
    Zhang, Xuanjun
    Department of Chemistry, Anhui University, China.
    Tian, Yupeng
    Department of Chemistry, Anhui University, China.
    [Synthesis, spectra, nonlinear optical properties and theoretical calculations of metal complexes containing phenothiazine ligand]2004Inngår i: Spectroscopy and Spectral Analysis, ISSN 1000-0593, Vol. 24, nr 6, s. 704-707Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A new ligand, S-benzyl-(-N-[10-ethylphenothiazinyl-3yl]-methylene] dithiocarbazate (abbreviated as HL), and its complexes ML2 (M=Co and Hg) have been synthesized and fully characterized by elemental analyses, EI-MS, 1H NMR, IR, UV-Vis spectra, and photoluminescence measurement. All of the compounds emit an olivine color in DMF solution. The emission maximum (lambdamax(em)), and fluorescence quantum (phif) of each compound were measured. Nonlinear Optical properties of the HL and ML2 were studied by z-scan technique. Nonlinear absorption coefficient beta were measured to be 0.71, 0.19 and 0.395 cm x GW(-1). Theoretical calculations (RHF/PM3) were consistent with the experimental results.

  • 27.
    Xue, Zhaoming
    et al.
    Department of Chemistry, Anhui University, China.
    Zhang, Xuanjun
    Department of Chemistry, Anhui University, China.
    Tian, Yupeng
    Department of Chemistry, Anhui University, China.
    Liu, Zhiqiang
    State key lab of crystal materials, Shandong University, China.
    Jiang, Minhua
    State key lab of crystal materials, Shandong University, China.
    Synthesis and NLO studies on metal complexes containing phenothiazine ligand2002Inngår i: Chinese journal of inorganic chemistry, ISSN 1001-4861, Vol. 18, nr 10, s. 1009-1014Artikkel i tidsskrift (Fagfellevurdert)
  • 28.
    Xue, Zhaoming
    et al.
    Department of Chemistry, Anhui University, Chína.
    Zhang, Xuanjun
    Department of Chemistry, Anhui University, Chína.
    Tian, Yupeng
    Department of Chemistry, Anhui University, Chína.
    Wu, Jieying
    Department of Chemistry, Anhui University, Chína.
    Jiang, Minhua
    State Key Laboratory of Crystal Materials, Shandong University, Chína.
    Fun, Hoong Kun
    X-ray Crystallography Laboratory, School of Physics, Universiti Sains Malaysia.
    Synthesis, Crystal Structure and Nonlinear Optical Properties of Nickel(Ⅱ) Complex with Schiff-base Ligand2003Inngår i: Chinese journal of structural chemistry, ISSN 0254-5861, Vol. 22, nr 3, s. 265-269Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The nickel(Ⅱ) complex with the new ligand of S-benzyl-β-N-[10-ethylphenothiazine-3-methylene]dithiocarbazate(HL) crystallizes in the triclinic system, space group P1-with a = 7.516(1), b = 11.322(1), c = 13.366(1) (A),α= 84.818(1),β= 81.688(1), y= 76.037(1)°, V= 1090.26(3) (A)3, Z = 1, Dc=1.413 g/cm3, F(000) = 482,μ(MoKα)= 0.774 mm-1 (λ= 0.7103(A)),R = 0.0573 and wR =0.1375 for 3357 observed reflections withⅠ≥ 2σ(Ⅰ). The HL has lost a proton from its tautomeric thiol form and acts as a single negatively charged bidentate ligand coordinating to the nickel ion via the mercapto sulfur and β-nitrogen atoms. The geometry around Ni(Ⅱ) is almost square-planar with two equivalent Ni-N and Ni-S bonds. The nonlinear absorption of HL and NiL2 solutions (in DMF) was measured by open-aperture Z-scan technique at the wavelength of 532 nm.

  • 29.
    Yao, Zhenyu
    et al.
    Nano-materials and Nano-chemistry, Hefei National Laboratory for Physical Sciences at Microscale, UniVersity of Science & Technology of China.
    Zhu, Xi
    Nano-materials and Nano-chemistry, Hefei National Laboratory for Physical Sciences at Microscale, UniVersity of Science & Technology of China.
    Wu, Changzheng
    Nano-materials and Nano-chemistry, Hefei National Laboratory for Physical Sciences at Microscale, UniVersity of Science & Technology of China.
    Zhang, Xuanjun
    Nano-materials and Nano-chemistry, Hefei National Laboratory for Physical Sciences at Microscale, UniVersity of Science & Technology of China.
    Xie, Yi
    Nano-materials and Nano-chemistry, Hefei National Laboratory for Physical Sciences at Microscale, UniVersity of Science & Technology of China.
    Fabrication of micrometer-scaled hierarchical tubular structures of CuS assembled by nanoflake-built microspheres using an in situ formed Cu(I) complex as a self-sacrificed template2007Inngår i: Crystal Growth & Design, ISSN 1528-7483, E-ISSN 1528-7505, Vol. 7, nr 7, s. 1256-1261Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Micrometer-scaled hierarchical tubular structures of CuS assembled by nanoflake-built microspheres were first synthesized in high yield via a one-pot intermediate crystal templating process without surfactant or added templates, in which the intermediate complex Cu3(TAA)3Cl3 formed in situ and subsequently served as a self-sacrificed template. Whereas the intermediate complex and final hierarchical structures were well characterized, the formation mechanism was preliminarily studied based on X-ray diffraction (XRD) studies and scanning electron microscopy (SEM) observations by arresting the growth at a series of intermediate stages in the formation of the hierarchical tubular structures. The benefits for the as-obtained nanostructures arise from their ultrahigh Brunauer−Emmett−Teller (BET) value and the potential capacity advantage for the catalyst industry and hydrogen storage.

  • 30.
    Ye, F.
    et al.
    Department of Chemistry, University of of Washington, Seattle, WA 98195, United States.
    Wu, C.
    Department of Chemistry, University of of Washington, Seattle, WA 98195, United States; State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012, China.
    Sun, W.
    Department of Chemistry, University of of Washington, Seattle, WA 98195, United States.
    Yu, J.
    Department of Chemistry, University of of Washington, Seattle, WA 98195, United States.
    Zhang, Xuanjun
    Department of Chemistry, University of of Washington, Seattle, WA 98195, United States.
    Rong, Y.
    Department of Chemistry, University of of Washington, Seattle, WA 98195, United States.
    Zhang, Y.
    Department of Chemistry, University of of Washington, Seattle, WA 98195, United States.
    Wu, I.-C.
    Department of Chemistry, University of of Washington, Seattle, WA 98195, United States.
    Chan, Y.-H.
    Department of Chemistry, University of of Washington, Seattle, WA 98195, United States; Department of Chemistry, National Sun Yat-Sen University, Kaohsiung, Taiwan.
    Chiu, D.T.
    Department of Chemistry, University of of Washington, Seattle, WA 98195, United States.
    Semiconducting polymer dots with monofunctional groups2014Inngår i: Chemical Communications, ISSN 1359-7345, E-ISSN 1364-548X, Vol. 50, nr 42, s. 5604-5607Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This communication describes an approach for preparing monovalent semiconducting polymer dots (mPdots) with a size of 5 nm where each mPdot was composed of precisely a single active functional group. © the Partner Organisations 2014.

  • 31.
    Ye, Fangmao
    et al.
    Department of Chemistry, University of Washington, Seattle, USA.
    Wu, Changfeng
    Department of Chemistry, University of Washington, Seattle, USA.
    Jin, Yuhui
    Department of Chemistry, University of Washington, Seattle, USA.
    Chan, Yang-Hsiang
    Department of Chemistry, University of Washington, Seattle, USA.
    Zhang, Xuanjun
    Department of Chemistry, University of Washington, Seattle, USA.
    Chiu, Daniel T
    Department of Chemistry, University of Washington, Seattle, USA.
    Ratiometric temperature sensing with semiconducting polymer dots2011Inngår i: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 133, nr 21, s. 8146-8149Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This communication describes ultrabright single-nanoparticle ratiometric temperature sensors based on semiconducting polymer dots (Pdots). We attached the temperature sensitive dye—Rhodamine B (RhB), whose emission intensity decreases with increasing temperature—within the matrix of Pdots. The as-prepared Pdot-RhB nanoparticle showed excellent temperature sensitivity and high brightness because it took advantage of the light harvesting and amplified energy transfer capability of Pdots. More importantly, the Pdot-RhB nanoparticle showed ratiometric temperature sensing under a single wavelength excitation and has a linear temperature sensing range that matches well with the physiologically relevant temperatures. We employed Pdot-RhB for measuring intracellular temperatures in a live-cell imaging mode. The exceptional brightness of Pdot-RhB allows this nanoscale temperature sensor to be used also as a fluorescent probe for cellular imaging.

  • 32.
    Yu, Jiangbo
    et al.
    Department of Chemistry, University of Washington, Seattle, USA.
    Wu, Changfeng
    Jilin University, Changchun, China.
    Zhang, Xuanjun
    Department of Chemistry, University of Washington, Seattle, USA.
    Ye, Fangmao
    Department of Chemistry, University of Washington, Seattle, USA.
    Gallina, Maria Elena
    Department of Chemistry, University of Washington, Seattle, USA.
    Rong, Yu
    Department of Chemistry, University of Washington, Seattle, USA.
    Wu, I-Che
    Department of Chemistry, University of Washington, Seattle, USA.
    Sun, Wei
    Department of Chemistry, University of Washington, Seattle,USA.
    Chan, Yang-Hsiang
    Department of Chemistry, University of Washington, Seattle, USA.
    Chiu, Daniel T
    Department of Chemistry, University of Washington, Seattle, USA.
    Stable Functionalization of Small Semiconducting Polymer Dots via Covalent Cross-linking and Application for Specific Cellular Imaging2012Inngår i: Advanced Materials, ISSN 0935-9648, E-ISSN 1521-4095, Vol. 24, nr 26, s. 3498-3504Artikkel i tidsskrift (Fagfellevurdert)
  • 33.
    Zhang, G.
    et al.
    Department of Chemistry, Key Laboratory of Functional Inorganic Materials of Anhui Province, Anhui University, Hefei, China.
    Ding, A.
    Department of Chemistry, Key Laboratory of Functional Inorganic Materials of Anhui Province, Anhui University, Hefei, China.
    Zhang, Y.
    Department of Chemistry, Key Laboratory of Functional Inorganic Materials of Anhui Province, Anhui University, Hefei, China.
    Yang, L.
    Department of Chemistry, Key Laboratory of Functional Inorganic Materials of Anhui Province, Anhui University, Hefei, China.
    Kong, L.
    Department of Chemistry, Key Laboratory of Functional Inorganic Materials of Anhui Province, Anhui University, Hefei, China.
    Zhang, Xuanjun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan.
    Tao, X.
    State Key Laboratory Materials, Shandong University, Jinan, China.
    Tian, Y.
    Department of Chemistry, Key Laboratory of Functional Inorganic Materials of Anhui Province, Anhui University, Hefei, China.
    Yang, J.
    Department of Chemistry, Key Laboratory of Functional Inorganic Materials of Anhui Province, Anhui University, Hefei 230039, China, State Key Laboratory Materials, Shandong University, Jinan, China.
    Schiff base modified α-cyanostilbene derivative with aggregation-induced emission enhancement characteristics for Hg2+ detection2014Inngår i: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 202, s. 209-216Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A Schiff base functionalized α-cyanostilbene derivative (TS) has been synthesized via a simple and straightforward method and characterized by FT-IR, 1H NMR, 13C NMR and mass spectra. TS possessed excellent AIEE properties and exhibited turn-on fluorescent responses to Hg2+. The results of UV-vis and fluorescence titration experiments revealed that TS was selective and sensitive to Hg2+ in pure THF and aqueous environment. The coordination of TS and Hg2+ ions generated TS-Hg complex locked the dancing molecule because of the flexible chain in the middle of the molecule and the complex was lower soluble induced formation of large aggregates that further limited the non-radiative relaxation channel enhanced emission after adding Hg2+ ions in aqueous solution, which had been confirmed by 1H NMR and dynamic light scattering (DLS). © 2014 Published by Elsevier Inc.

  • 34.
    Zhang, Mingliang
    et al.
    Department of Chemistry, Anhui University, China.
    Tian, Yupeng
    Department of Chemistry, Anhui University, China.
    Zhang, Xuanjun
    Department of Chemistry, Anhui University, China.
    Wu, Jieying
    Department of Chemistry, Anhui University, China.
    Zhang, Shengyi
    Department of Chemistry, Anhui University, China.
    Wang, Dong
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Jiang, Minhua
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Chantrapromm, Suchada
    Crystallography Unit, School of Physics, Universiti Sain Malaysia.
    Fun, Hoong-Kun
    Crystallography Unit, School of Physics, Universiti Sain Malaysia.
    Synthesis, crystal structure and two-photon property studies on a series of complexes derived from a novel Schiff base ligand2004Inngår i: Transition metal chemistry (Weinheim), ISSN 0340-4285, E-ISSN 1572-901X, Vol. 29, nr 6, s. 596-602Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A new Schiff base ligand derived from S-benzyldithiocarbazate and 4-[N-hydroxy ethyl-N-(methyl)amino]benzaldehyde (HL, where H is a dissociable proton) and its NiII, CuII, ZnII and PdII complexes were prepared and fully characterized. The structures of HL and Ni(L)2 were determined by X-ray diffraction analysis, which revealed that the geometry of the NiII ion is square-planar with two equivalent Ni=N and Ni=S bonds, and that the two neighboring molecules in two layers have weak contact. The electronic spectra and solution fluorescence of the ligand and the complexes were studied, and the quantum yields of single-photon fluorescence for the compounds were determined. The compounds possess two-photon absorption (t.p.a.) character and the t.p.a. coefficient β and t.p.a. cross-section σ were determined by the Z-scan technique. Especially, the Zn(L)2complex and the HL ligand exhibit intensive two-photon fluorescence (t.p.f.) at 800 nm laser pulses in the femtosecond regime.

  • 35.
    Zhang, Xuanjun
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Ali Ballem, Mohamed
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Nanostrukturerade material. Linköpings universitet, Tekniska högskolan.
    Ahrén, Maria
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Suska, Anke
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Tillämpad Fysik. Linköpings universitet, Tekniska högskolan.
    Bergman, Peder
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Halvledarmaterial. Linköpings universitet, Tekniska högskolan.
    Uvdal, Kajsa
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Nanoscale Ln(III)-carboxylate coordination polymers (Ln = Gd, Eu, Yb): temperature-controlled guest encapsulation and light harvesting2010Inngår i: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 132, nr 30, s. 10391-10397Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We report the self-assembly of stable nanoscale coordination polymers (NCPs), which exhibit temperature-controlled guest encapsulation and release, as well as an efficient light-harvesting property. NCPs are obtained by coordination-directed organization of pi-conjugated dicarboxylate (L1) and lanthanide metal ions Gd(III), Eu(III), and Yb(III) in a DMF system. Guest molecules trans-4-styryl-1-methylpyridiniumiodide (D1) and methylene blue (D2) can be encapsulated into NCPs, and the loading amounts can be controlled by changing reaction temperatures. Small angle X-ray diffraction (SAXRD) results reveal that the self-assembled discus-like NCPs exhibit long-range ordered structures, which remain unchanged after guest encapsulations. Experimental results reveal that the negatively charged local environment around the metal connector is the driving force for the encapsulation of cationic guests. The D1 molecules encapsulated in NCPs at 140 degrees C can be released gradually at room temperature in DMF. Guest-loaded NCPs exhibit efficient light harvesting with energy transfer from the framework to the guest D1 molecule, which is studied by photoluminescence and fluorescence lifetime decays. This coordination-directed encapsulation approach is general and should be extended to the fabrication of a wide range of multifunctional nanomaterials.

  • 36.
    Zhang, Xuanjun
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Ballem, Mohamed
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Nanostrukturerade material. Linköpings universitet, Tekniska högskolan.
    Hu, Zhang-Jun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Bergman, J Peder
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Halvledarmaterial. Linköpings universitet, Tekniska högskolan.
    Uvdal, Kajsa
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska fakulteten.
    Nanoscale Light-Harvesting Metal-Organic Frameworks2011Inngår i: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 50, nr 25, s. 5728-5732Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    n/a

  • 37.
    Zhang, Xuanjun
    et al.
    Department of Chemistry, National University of Singapore.
    Chen, Zhi-Kuan
    Institute of Materials Research and Engineering, Singapore.
    Loh, Kian Ping
    Department of Chemistry, National University of Singapore.
    Coordination-Assisted Assembly of 1-D Nanostructured Light-Harvesting Anntea2009Inngår i: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 131, nr 21, s. 7210-7211Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    An efficient light-harvesting antenna was achieved via self-assembly of two distinct chromophores into nanoscale supramolecular coordination polymers (NSCPs). Efficient fluorescence resonance energy transfer is favorable in the self-assembled 1-D nanostructure as a result of fast and efficient exciton migration in the ordered architecture.

  • 38.
    Zhang, Xuanjun
    et al.
    Department of Chemistry and Multidisciplinary Research Center Shantou University, China.
    Li, Dan
    Department of Chemistry and Multidisciplinary Research Center Shantou University, China.
    Metal-Compound-Induced Vesicles as Efficient Directors for Rapid Synthesis of Hollow Alloy Spheres2006Inngår i: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 45, nr 36, s. 5971-5974Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Hollow alloy: Vesicles formed from tetrabutylammonium bromide and metal compounds act as efficient directors for the rapid synthesis of a variety of binary, ternary, and quaternary intermetallic materials with hollow structures. In this way, different metals were co-alloyed on the vesicle surface to produce hollow alloy spheres containing more than two kinds of metals.

  • 39.
    Zhang, Xuanjun
    et al.
    Department of Chemistry, Shantou University, China .
    Li, Dan
    Department of Chemistry, Shantou University, China .
    Zhou, Xiao-Ping
    Department of Chemistry, Shantou University, China.
    Anion-Directed Assembly of Macrocycle and Helix2006Inngår i: Crystal Growth & Design, ISSN 1528-7483, E-ISSN 1528-7505, Vol. 6, nr 6, s. 1440-1444Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Self-assembly of the flexible ligand N,N‘-bis(3-pyridylmethyl)thiourea (bpt) with ZnCl2 and CdCl2 in the absence and presence of KSCN yielded a short series of novel complexes (14) with macrocyclic, helical, double-helical, and 1D polymeric structures. Different metal ions, hydrogen bonds, and counteranions play significant roles in the final crystal structures. The NCS- anion was found to favor the formation of helical structures, whereas the Cl- anion favored macrocycle formation in the present system. Photoluminescence (PL) measurement results revealed that complex 2 (Zn(bpt)(SCN)2) with a helical structure exhibits enhanced emissions compared to those of the ligand and other complexes. The anion-directed assembly as well as the interesting emissions may provide useful information for further design of metal−organic compounds with novel structures and properties.

  • 40.
    Zhang, Xuanjun
    et al.
    Department of Chemistry & Institute of Advanced Materials, Shantou University, China.
    Li, Dan
    Department of Chemistry & Institute of Advanced Materials, Shantou University, China.
    Zhou, Xiao-Ping
    Department of Chemistry & Institute of Advanced Materials, Shantou University, China.
    From Large 3D Assembly to Highly Dispersed Spherical Assembly: Weak- and Strong- Coordination Mediated Self-Aggregation of Au Colloids2006Inngår i: New Journal of Chemistry, ISSN 1144-0546, E-ISSN 1369-9261, Vol. 30, s. 706-711Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Distinctly different 3D assemblies of 1.6 nm Au nanoparticles are constructed based on weak and strong coordination strategies. Reduction of KAuCl4 with NaBH4 in the presence of newly-synthesized 4-(4-phenylmethanethiol)-2,2′:6′,2′′-terpyridine (1) yields functionalized Au nanoparticles which assemble in situ into large 3D aggregates via weak coordination between alkali metal ions and terpyridine attached to separated particles. These assemblies are disassembled into individual nanoparticles via addition of DMF solvent and further reassembled into highly dispersed 3D spherical nanostructures via addition of Co2+ (strong coordination with 1). Wide and small angle XRD measurements show that the assemblies are formed from small Au nanoparticles, consistent with TEM results. It is significant that the large aggregates formed in situ can be directly transformed into nearly monodispersed 3D spherical assemblies via strong coordination (with Co2+), presenting the first example of a direct transformation of one 3D nanonetwork into another distinctly different 3D nanonetwork. The controlled assembly and disassembly processes are accompanied by distinct shifts in the surface plasmon resonance.

  • 41.
    Zhang, Xuanjun
    et al.
    Department of Chemistry, Shantou University, China.
    Li, Dan
    Department of Chemistry, Shantou University, China.
    Zhou, Xiaoping
    Department of Chemistry, Shantou University, China.
    Ng, Seik Weng
    Department of Chemistry, University of Malaya.
    Dichlorobis(phenothiazine-S)palladium(II)2005Inngår i: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. E61, s. m603-m605Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In the title complex, [PdCl2(C12H9NS)2], the Pd atom lies on a center of inversion and is coordinated by two chloride anions and two S atoms from two phenothiazine ligands, forming a square-planar PdCl2S2 geometry. In the crystal structure, a one-dimensional polymer structure is constructed via N-H...Cl and N-H...N hydrogen bonds.

  • 42.
    Zhang, Xuanjun
    et al.
    Department of Chemistry, National University of Singapore.
    Loh, Kian Ping
    Department of Chemistry, National University of Singapore.
    Sullivan, Michael B.
    Institute of High Performance Computing, Singapore.
    Chen, Zhi-kuan
    Institute of Material Research and Engineering, Singapore.
    Liu, Minghui
    NUS Nanoscience and Nanotechnology InitiatiVe, Singapore.
    Aggregation dependent S1 and S2 dual emissions of thiophene-acrylonitrile-carbazole oligomer2008Inngår i: Crystal Growth & Design, ISSN 1528-7483, E-ISSN 1528-7505, Vol. 8, nr 7, s. 2543-2546Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Dual emissions from S1 (blue region) and S2 (UV region) states of a chromophore with donor−acceptor structure were observed at room temperature. The photophysical properties of the chromophore depend critically on the packing of the molecules. The molecule exhibits weak S1 emission and strong S2 emission; however, when it undergoes solid aggregation, the S1 emission is enhanced while the S2 emission is quenched. The H-packing (face-to-face packing) of the molecules is revealed as the key factor for this interesting aggregation-dependent dual emission.

  • 43.
    Zhang, Xuanjun
    et al.
    Department of Chemistry, National University of Singapore.
    Ren, Xinsheng
    Department of Chemistry, National University of Singapore.
    Xu, Qinghua
    Department of Chemistry, National University of Singapore.
    Loh, Kian Ping
    Department of Chemistry, National University of Singapore.
    Chen, Zhi-Kuan
    Institute of Materials Research and Engineering, Singapore.
    One- and Two-photon Fluorescent Probe for Cysteine and Homocysteine with Large Emission Shift2009Inngår i: Organic Letters, ISSN 1523-7060, E-ISSN 1523-7052, Vol. 11, nr 6, s. 1257-1260Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A novel dendritic chromophore with efficient intramolecular charge transfer (ICT) and strong two-photon absorption (TPA) was designed as a turn-on fluorescent probe for cysteine (Cys) and homocysteine (Hcy). The probe exhibited greatly enhanced fluorescence intensity as well as a very large emission peak shift (165 nm) upon addition of Cys/Hcy due to ICT switch off. The sensing process was also monitored by two-photon excited fluorescence (TPEF).

  • 44.
    Zhang, Xuanjun
    et al.
    Department of chemistry, Anhui University; University of Science and Technology of China.
    Tian, Yupeng
    Department of chemistry, Anhui University, China.
    Jin, Feng
    Department of chemistry, Anhui University, China.
    Wu, Jieying
    Department of chemistry, Anhui University, China.
    Xie, Yi
    Department of chemistry, University of Science and Technology of China.
    Tao, Xutang
    The State Key Laboratory of Crystal Materials, Shandong University, China.
    Jiang, Minhua
    The State Key Laboratory of Crystal Materials, Shandong University, China.
    Self-assembly of Organic Chromophore with Cd-S Nanoclusters: Supramolecular Structures and Enhanced Emissions2005Inngår i: Crystal Growth & Design, ISSN 1528-7483, E-ISSN 1528-7505, Vol. 5, nr 2, s. 565-570Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    By combination of the large organic cation [trans-4-(4-dimethylanilino-styryl)-N-methyl-pyridinium with nanocluster anions ([Cd4(SC6H5)10]2- for compound 1 and [Cd4(SC6H5)6I4]2- for compound 2), two new hybrids were obtained and the structure of the [Cd4(SC6H5)6I4]2- cluster was first characterized by single-crystal X-ray diffraction. A novel supramolecular dimer {[Cd4(SC6H5)10]2-}2, connected via strong ππ interactions, was observed in 1, whereas every two [Cd4(SC6H5)6I4]2- clusters in 2 were linked by multiple C−H···I hydrogen bonds forming dimers, which, as building blocks, were further connected to each other via C−H···I hydrogen bonds and weak I···I interactions to form novel 1D helical chains. The UV−visible−near-IR spectra, one-photon excited photoluminescence, and two-photon pumped lasing were measured. The organic chromophore exhibits enhanced PL and two-photon pumped lasing in the two hybrids

  • 45.
    Zhang, Xuanjun
    et al.
    Department of Chemistry, Anhui University, China.
    Tian, Yupeng
    Department of Chemistry, Anhui University, China.
    Li, Shengli
    Department of Chemistry, Anhui University, China.
    Jiang, Minhua
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Usman, Anwar
    X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia.
    Chantrapromma, Suchada
    X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia.
    Fun, Hoong-Kun
    X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia.
    Zn(II) and Cd(II) N-carbazolylacetates with strong fluorescence2003Inngår i: Polyhedron, ISSN 0277-5387, E-ISSN 1873-3719, Vol. 22, nr 3, s. 397-402Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    N-carbazolylacetic acid was synthesized using a new method in a high yield and two carbazolylacetato complexes [Zn(Cabo)-(phen)2ClO4]·0.5C2H5OH and [Cd(Cabo)(phen)2-ClO4] (Cabo=N-carbazolylacetate, phen=1,10-phenanthroline) were synthesized and characterized by elemental analysis, IR, UV–Vis spectra, thermal analyses, photoluminescence measurement and X-ray diffraction studies. Both of the complexes exhibit strong blue emission in solid state as well as high thermal stability and solvent-resistant properties.

  • 46.
    Zhang, Xuanjun
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan.
    Wang, Wenjing
    Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, China.
    Hu, Zhangjun
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan.
    Wang, Guannan
    Liaoning Medical University, China.
    Uvdal, Kajsa
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan.
    Coordination polymers for energy transfer: Preparations, properties, sensing applications, and perspectives2015Inngår i: Coordination chemistry reviews, ISSN 0010-8545, E-ISSN 1873-3840, Vol. 284, s. 206-235Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    This review highlights the recent progress of bulk and nanoscale coordination polymer (CP) materials forenergy transfer. Artificial light-harvesting materials with efficient energy transfer are practically usefulfor a variety of applications including photovoltaic, white emitting devices, and sensors. In the pastdecades CP (aka Metal-organic framework, MOF) has experienced rapid development due to a multitude of applications, including catalyst, gas storage and separations, non-linear optics, luminescence, and soon. Recent research has shown that CP is a very promising light-harvesting platform because the energytransfers can occur between different ligands, from ligand to metal centers, or from MOF skeleton to guestspecies. This review comprehensively surveyed synthetic approaches to light-harvesting CPs, and postfunctionalization. Sensing applications and achievements in energy-transfer CP nanoparticles and thinfilms were also discussed.

  • 47.
    Zhang, Xuanjun
    et al.
    Department of Chemistry, Anhui University, China.
    Wu, Jieying
    Department of Chemistry, Anhui University, China.
    Zhang, Mingliang
    Department of Chemistry, Anhui University, China.
    Tian, Yupeng
    Department of Chemistry, Anhui University, China.
    Jiang, Minhua
    State Key Laboratory of Crystal Materials, Shandong University, China.
    Usman, Anwar
    X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia.
    Chantrapromma, Suchada
    X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia.
    Fun, Hoong-Kun
    X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia.
    Two strong emitting coordination polymers with chain and ladder structures2003Inngår i: Transition metal chemistry (Weinheim), ISSN 0340-4285, E-ISSN 1572-901X, Vol. 28, nr 6, s. 707-711Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Two coordination polymers [Zn(Cabo)2(EtOH)2(4,4′-Bipy)]n(1), and [Zn2(Cabo)2(NO3)2(4,4′-Bipy)2]n(2) (Cabo = carbazolylacetate, 4,4′-Bipy = 4,4′-bipyridine) with chain and ladder structures, respectively, were prepared and characterized by X-ray single-crystal structural analysis. The results showed that the different anions of metal salts have a large effect on the construction of coordination frameworks. Both complexes show strong emissions in the solid state as well as high thermal stability.

  • 48.
    Zhang, Xuanjun
    et al.
    Structure Research Laboratory and Department of Chemistry, University of Science and Technology of China.
    Xie, Yi
    Structure Research Laboratory and Department of Chemistry, University of Science and Technology of China.
    Yu, Wentao
    The State Key Laboratory of Crystal Materials, Shandong University, China.
    Zhao, Qingrui
    Structure Research Laboratory and Department of Chemistry, University of Science and Technology of China.
    Jiang, Minhua
    The State Key Laboratory of Crystal Materials, Shandong University, China.
    Tian, Yupeng
    Department of Chemistry, Anhui University, China.
    Formation of A Novel 1D Supramolecule [HgCl2(ptz)]2·HgCl2 (ptz = Phenothiazine): A New Precursor to Submicrometer Hg2Cl2 Rods2003Inngår i: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 42, nr 12, s. 3734-3737Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A novel supramolecule [HgCl2(ptz)]2·HgCl2 (ptz = phenothiazine) with uncoordinated inorganic salt HgCl2 presented in a 1D chain was first prepared and then successfully applied as a new precursor in the preparation of submicrometer Hg2Cl2 rods. Single crystal X-ray analysis showed that the 1D chain structure is stabilized by hydrogen bonds between adjacent chains and the coordination mode of the ligand phenothiazine is unusual with large steric inhibition other than the chain directions. The results revealed that the particular chain structure plays a significant role in the formation of the Hg2Cl2 rods.

  • 49.
    Zhang, Xuanjun
    et al.
    Structure Research Laboratory and Department of Chemistry, University of Science and Technology of China.
    Xie, Yi
    Structure Research Laboratory and Department of Chemistry, University of Science and Technology of China.
    Zhao, Qingrui
    Structure Research Laboratory and Department of Chemistry, University of Science and Technology of China.
    Tian, Yupeng
    Department of Chemistry, Anhui University, China.
    1-D coordination polymer template approach to CdS and HgS aligned-nanowire bundles2003Inngår i: New Journal of Chemistry, ISSN 1144-0546, E-ISSN 1369-9261, Vol. 27, nr 5, s. 827-830Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A 1D inorganic coordination polymer template route was firstly developed to synthesize metal sulfide aligned-nanowire bundles. Based on this strategy, CdS and HgS aligned-nanowire bundles with high yields were successfully prepared in a water system at room temperature using KCd(NCS)3 as a soft template. The results revealed that the morphologies of the MS (M=Cd, Hg) aligned-nanowire bundles were uniform with lengths of several microns and the diameters of each single wire were ca. 10–30 nm and 60–80 nm for CdS and HgS, respectively.

  • 50.
    Zhang, Xuanjun
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan.
    Yu, Jiangbo
    Department of Chemistry, University of Washington, Seattle, USA.
    Rong, Yu
    Department of Chemistry, University of Washington, Seattle, USA.
    Ye, Fangmao
    Department of Chemistry, University of Washington, Seattle, USA.
    Chiu, Daniel T
    Department of Chemistry, University of Washington, Seattle, USA.
    Uvdal, Kajsa
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Molekylär ytfysik och nanovetenskap. Linköpings universitet, Tekniska högskolan.
    High-intensity near-IR fluorescence in semiconducting polymer dots achieved by cascade FRET strategy2013Inngår i: Chemical Science, ISSN 2041-6520, E-ISSN 2041-6539, Vol. 4, nr 5, s. 2143-2151Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Near-IR (NIR) emitting semiconducting polymer dots (Pdots) with ultrabright fluorescence have been prepared for specific cellular targeting. A series of π-conjugated polymers were synthesized to form water dispersible multicomponent Pdots by an ultrasonication-assisted co-precipitation method. By optimizing cascade energy transfer in Pdots, high-intensity NIR fluorescence (Φ = 0.32) with tunable excitations, large absorption–emission separation (up to 330 nm), and narrow emission bands (FWHM = 44 nm) have been achieved. Single-particle fluorescence imaging show that the as-prepared NIR Pdots were more than three times brighter than the commercially available Qdot705 with comparable sizes under identical conditions of excitation and detection. Because of the covalent introduction of carboxylic acid groups into polymer side chains, the bioconjugation between NIR-emitting Pdots and streptavidins can be readily completed via these functional groups on the surface of Pdots. Furthermore, through flow cytometry and confocal fluorescence microscopy the NIR-emitting Pdot–streptavidin conjugates proved that they could effectively label EpCAM receptors on the surface of MCF-7 cells, via specific binding between streptavidin and biotin.

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