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Hu, Zhang-Jun, Dr.
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Publications (10 of 19) Show all publications
Xu, W., Hu, Q., Bai, S., Bao, C., Miao, Y., Yuan, Z., . . . Gao, F. (2019). Rational molecular passivation for high-performance perovskite light-emitting diodes. Nature Photonics, 13(6), 418-424
Open this publication in new window or tab >>Rational molecular passivation for high-performance perovskite light-emitting diodes
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2019 (English)In: Nature Photonics, ISSN 1749-4885, E-ISSN 1749-4893, Vol. 13, no 6, p. 418-424Article in journal (Refereed) Published
Abstract [en]

A major efficiency limit for solution-processed perovskite optoelectronic devices, for example light-emitting diodes, is trap-mediated non-radiative losses. Defect passivation using organic molecules has been identified as an attractive approach to tackle this issue. However, implementation of this approach has been hindered by a lack of deep understanding of how the molecular structures influence the effectiveness of passivation. We show that the so far largely ignored hydrogen bonds play a critical role in affecting the passivation. By weakening the hydrogen bonding between the passivating functional moieties and the organic cation featuring in the perovskite, we significantly enhance the interaction with defect sites and minimize non-radiative recombination losses. Consequently, we achieve exceptionally high-performance near-infrared perovskite light-emitting diodes with a record external quantum efficiency of 21.6%. In addition, our passivated perovskite light-emitting diodes maintain a high external quantum efficiency of 20.1% and a wall-plug efficiency of 11.0% at a high current density of 200 mA cm−2, making them more attractive than the most efficient organic and quantum-dot light-emitting diodes at high excitations.

Place, publisher, year, edition, pages
Springer Nature Publishing AG, 2019
National Category
Physical Sciences
Identifiers
urn:nbn:se:liu:diva-157707 (URN)10.1038/s41566-019-0390-x (DOI)000468752300019 ()
Note

Funding agencies:  ERC Starting Grant [717026]; National Basic Research Program of China (973 Program) [2015CB932200]; National Natural Science Foundation of China [61704077, 51572016, 51721001, 61634001, 61725502, 91733302, U1530401]; Natural Science Foundation of Jiangsu 

Available from: 2019-06-19 Created: 2019-06-19 Last updated: 2019-07-01Bibliographically approved
Hu, J., Liu, T., Gao, H.-W., Lu, S., Uvdal, K. & Hu, Z.-J. (2018). Selective detections of Hg2+ and F- by using tailor-made fluorogenic probes. Sensors and actuators. B, Chemical, 269, 368-376
Open this publication in new window or tab >>Selective detections of Hg2+ and F- by using tailor-made fluorogenic probes
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2018 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 269, p. 368-376Article in journal (Refereed) Published
Abstract [en]

By ingeniously using a (imino)coumarin-precursor, three reactive fluorogenic probes of MP, FP, and FMP have been fabricated in a single facile synthetic route. MP and FP are able to respectively act as selective "turn-on" fluorescent probes for detecting Hg2+ and F- in buffer solution via specific analyte-induced reactions. Linear ranges for the detection of Hg2+ and F- are 0-10 mu M and 0-100 mu M with the limits of detection (LODs) of 4.0 x 10(-8) M and 1.14 x 10(-6) M (3 delta/slope), respectively. FMP is able to work as a molecular "AND" logic gate-based fluorogenic probe for monitoring the coexistence of Hg2+ and F- via a multistep reaction cascade. The analytes-induced sensing mechanisms have been determined by using high-performance liquid chromatography analysis (HPLC). In addition, three probes show negligible toxicity under the experimental conditions, and are successfully used for monitoring Hg2+ and F- in living cells with good cell permeability. The success of the work demonstrates that ingenious utility of specific analyte-induced reactions and conventional concepts on the appropriate molecular scaffold can definitely deliver tailor-made probes for various intended sensing purposes. (C) 2018 Published by Elsevier B.V.

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Coumarin; Chemosensor; Mercury; Fluoride; "AND" logic gate
National Category
Analytical Chemistry
Identifiers
urn:nbn:se:liu:diva-149331 (URN)10.1016/j.snb.2018.04.164 (DOI)000433211100044 ()
Note

Funding Agencies|Natural Science Foundation of Shanghai [17ZR1410500]; National Natural Science Foundation of China [21577098, 21477073]; Swedish Research Council (VR) [621-2013-5357]; Swedish Government strategic faculty grant in material science (SFO, MATLIU) in Advanced Functional Materials (AFM) (VR) [5.1-2015-5959]

Available from: 2018-07-02 Created: 2018-07-02 Last updated: 2018-08-10
Hu, J., Hu, Z.-J., Chen, Z., Gao, H.-W. & Uvdal, K. (2016). A logic gate-based fluorogenic probe for Hg2+ detection and its applications in cellular imaging. Analytica Chimica Acta, 919, 85-93
Open this publication in new window or tab >>A logic gate-based fluorogenic probe for Hg2+ detection and its applications in cellular imaging
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2016 (English)In: Analytica Chimica Acta, ISSN 0003-2670, E-ISSN 1873-4324, Vol. 919, p. 85-93Article in journal (Refereed) Published
Abstract [en]

A new colorimetric and fluorogenic probe (RN3) based on rhodamine-B has been successfully designed and synthesized. It displays a selective response to Hg2+ in the aqueous buffer solution over the other competing metals. Upon addition of Hg2+, the solution of RN3 exhibits a naked eye observable color change from colorless to red and an intensive fluorescence with about 105-fold enhancement. The changes in the color and fluorescence are ascribed to the ring-opening of spirolactam in rhodamine fluorophore, which is induced by a binding of the constructed receptor to Hg2+ with the association and dissociation constants of 0.22 x 10(5) M-1 and 25.2 mM, respectively. The Jobs plot experiment determines a 1: 1 binding stoichiometry between RN3 and Hg2+. The resultant "turn-on" fluorescence in buffer solution, allows the application of a method to determine Hg2+ levels in the range of 4.0-15.0 mu M, with the limit of detection (LOD) calculated at 60.7 nM (3 sigma/slope). In addition, the fluorescence turn-off and color fading-out happen to the mixture of RN3-Hg2+ by further addition of I- or S2-. The reversible switching cycles of fluorescence intensity upon alternate additions of Hg2+ and S2- demonstrate that RN3 can perform as an INHIBIT logic gate. Furthermore, the potential of RN3 as a fluorescent probe has been demonstrated for cellular imaging. (C) 2016 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV, 2016
Keywords
Mercury; Rhodamine; Fluorogenic probe; Fluorescent imaging; Logical gate
National Category
Analytical Chemistry
Identifiers
urn:nbn:se:liu:diva-128135 (URN)10.1016/j.aca.2016.03.017 (DOI)000374642400011 ()27086103 (PubMedID)
Note

Funding Agencies|National Natural Science Foundation of China [21577098]; Knut and Alice Wallenberg Foundation (KAW) [2012.0083]; Swedish Government Strategic Faculty Grant in Material Science 11 (SFO, MATLIU) in Advanced Functional Materials (AFM) (VR) [5.1-2015-5959]; Centre in Nano Science and Nanotechnology (CeNano) Grant in LiTH

Available from: 2016-05-19 Created: 2016-05-19 Last updated: 2018-03-21
Hu, J., Hu, Z.-J., Liu, S., Zhang, Q., Gao, H.-W. & Uvdal, K. (2016). A new ratiometric fluorescent chemodosimeter based on an ICT modulation for the detection of Hg2+. Sensors and actuators. B, Chemical, 230, 639-644
Open this publication in new window or tab >>A new ratiometric fluorescent chemodosimeter based on an ICT modulation for the detection of Hg2+
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2016 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 230, p. 639-644Article in journal (Refereed) Published
Abstract [en]

We design and synthesize a new ratiometric fluorescent chemodosimeter (S1) for the selective and sensitive detection of Hg2+. Upon addition of Hg2+, the emission of the S1 exhibits a large bathochromic shift from 393 to 515 nm (up to 122 nm) which is ascribed to an intramolecular charge transfer process in the resultant. The Hg2+-induced dethioacetalization for sensing mechanism has been demonstrated by using high-performance liquid chromatography analysis of the sensing process. The interference experiments further demonstrate that S1 exhibits very high selectivity towards Hg2+ over other coexisting cations/anions. Subsequently, a good linearity of the concentrations of Hg2+ (0-15 mu M) vs the ratiometric signals (I-515/I-393) allows a fluorogenic method for the quantitative detection of Hg2+, with the limitation of detection determined to be 5.22 x 10(-7) M. (C) 2016 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA, 2016
Keywords
Chemodosimeter; Ratiometric fluorescence; Mercury detection; Intramolecular charge transfer; Phenanthroimidazole
National Category
Physical Sciences
Identifiers
urn:nbn:se:liu:diva-128714 (URN)10.1016/j.snb.2016.02.125 (DOI)000374329300081 ()
Note

Funding Agencies|National Natural Science Foundation of China [21577098]; Foundation of State Key Laboratory of Pollution Control and Resource Reuse, China [PCRRK13024]; Knut and Alice Wallenberg Foundation (KAW) [2012.0083]; Swedish Government strategic faculty grant in material science (SFO, MATLIU) in Advanced Functional Materials (AFM) (VR) [5.1-2015-5959]; International Exchange Program for Graduate Students of Tongji University [201502013]

Available from: 2016-06-07 Created: 2016-05-30 Last updated: 2018-03-20
Yu, Y., Hu, Z.-J., Zhang, Y. & Gao, H. (2016). CTAB@BiOCl: a highly adsorptive photocatalyst for eliminating dye contamination. RSC Advances, 6(22), 18577-18582
Open this publication in new window or tab >>CTAB@BiOCl: a highly adsorptive photocatalyst for eliminating dye contamination
2016 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 6, no 22, p. 18577-18582Article in journal (Refereed) Published
Abstract [en]

The title composite was synthesized under facile conditions by hydrolysis and co-precipitation. Through comparative studies, it was found that the morphology, structure and properties were affected by hexadecyl trimethylammonium bromide (CTAB) doping. Although the surface area decreases from 53.5 to 7.5 m(2) g(-1), it was found that CTAB@BiOCl exhibits higher adsorption capacity than the isolated BiOCl, and still maintains good photocatalytic activity, which is a little worse than the isolated BiOCl has. This was caused by the lower content of BiOCl in CTAB@BiOCl, which is less than 70%. The studies show that, in high concentrations of dye-contaminated water, the composite exhibits strong adsorption capacities of 901 mg g(-1) to Congo Red (CR) and 699 mg g(-1) to Reactive Red 3 (X3B). In the low-concentration case, it is able to process photocatalysis of those dyes. In the recycling experiment, the CTAB@BiOCl composite was regenerated in situ. And CTAB in the composite was almost completely degraded after five cycles, resulting in the regenerated BiOCl. Subsequently, the surface area of the composite increases from 7.5 to 22.62 m(2) g(-1), and along with this the adsorption capacities to CR and X3B decrease obviously due to the absence of the CTAB component. In addition, the photocatalysis activity of the generated composite has been promoted to be similar to the isolated BiOCl.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY, 2016
National Category
Physical Sciences
Identifiers
urn:nbn:se:liu:diva-126147 (URN)10.1039/c5ra27714k (DOI)000370717900083 ()
Note

Funding Agencies|National Key Technologies R&D Program of China [2012BAJ25B02]

Available from: 2016-03-15 Created: 2016-03-15 Last updated: 2017-11-30
Zhang, Q., Luo, L., Xu, H., Hu, Z.-J., Brommesson, C., Wu, J., . . . Uvdal, K. (2016). Design, synthesis, linear and nonlinear photophysical properties of novel pyrimidine-based imidazole derivatives. New Journal of Chemistry, 40(4), 3456-3463
Open this publication in new window or tab >>Design, synthesis, linear and nonlinear photophysical properties of novel pyrimidine-based imidazole derivatives
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2016 (English)In: New Journal of Chemistry, ISSN 1144-0546, E-ISSN 1369-9261, Vol. 40, no 4, p. 3456-3463Article in journal (Refereed) Published
Abstract [en]

Novel donor-pi-acceptor (D-pi-A) and donor-pi-acceptor-pi-donor (D-pi-A-pi-D) type pyrimidine imidazole derivatives with flexible ether chains (L1 and L2) have been efficiently synthesized through improved Knoevenagel condensation and Ullmann reactions with high yields. Based on systematic photophysical investigations and theoretical calculations, the structure-property relationships can be described as follows: (1) the linear and nonlinear optical properties of the target chromophores change regularly with increasing the number of branches and the polarity of the solvents. (2) The single-substituted chromophore L2 exhibited a remarkable negative solvato-kinetic effect, while the double-substituted chromophore L1 showed a positive solvato-kinetic effect. Significant bathochromic shifting of the emission spectra and larger Stokes shifts were observed in polar solvents. (3) The two-photon absorption (TPA) cross-section results further demonstrated that their TPA cross section values (delta) increase notably with increasing branch number, and the presence of high pi-delocalization could induce large size-scalable TPA enhancements. (4) By comprehensively considering the optical performance, cytotoxicity and solubility, L1 was identified as the better candidate for living cell (HepG2) imaging.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY, 2016
National Category
Physical Sciences
Identifiers
urn:nbn:se:liu:diva-127760 (URN)10.1039/c5nj02874d (DOI)000373993600060 ()
Note

Funding Agencies|National Natural Science Foundation of China [21501001, 21271004, 51372003, 51432001, 21271003, 51072001, 81503009, 51272001]; National Key Basic Research Program 973 [2013CB632705]; Ministry of Education; Program for New Century Excellent Talents in University (China); Doctoral Program Foundation of Ministry of Education of China [20113401110004]; China Postdoctoral Science Foundation [2015M571912]; Swedish Research Council (VR) [621-2013-5357]; Swedish Government (SFO, MATLIU) in Advanced Functional Materials (AFM); Wenner-Gren Foundation

Available from: 2016-05-12 Created: 2016-05-12 Last updated: 2017-11-30
Wu, L., Shao, Y., Hu, Z.-J. & Gao, H. (2016). Effects of soluble sulfide on zebrafish (Danio rerio) embryonic development. Environmental Toxicology and Pharmacology, 42, 183-189
Open this publication in new window or tab >>Effects of soluble sulfide on zebrafish (Danio rerio) embryonic development
2016 (English)In: Environmental Toxicology and Pharmacology, ISSN 1382-6689, E-ISSN 1872-7077, Vol. 42, p. 183-189Article in journal (Refereed) Published
Abstract [en]

Zebrafish embryos were used to investigate the developmental effects of sulfide. Mortality, teratogenic effects, and developmental parameters of early developmental embryos were recorded. The biodistribution of sulfide in developing zebrafish embryos and larvae were measured through fluorescence imaging. The influences of sulfide on the cardiac function and development velocity of zebrafish embryos were dependent on sulfide concentration. Heart rate and development velocity increased with exposure to lower sulfide concentrations, which may be attributed to the cardioprotective properties of H2S. Meanwhile, heart rate and development velocity decreased, whereas pericardial edema, yolk sac edema, and trunk abnormalities occurred with exposure to higher sulfide concentrations. Sulfide accumulated in the blastoderm of early developmental embryos and was then transported to the yolk sac and yolk extension with the embryonic development. Finally, sulfide was transferred from the yolk to the eyes of zebrafish larvae. The details of mechanism of sulfide toxicity require further research. (C) 2016 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV, 2016
Keywords
Sulfide; Zebrafish embryos; Embryotoxic; Biodistribution; Cardioprotective
National Category
Physical Sciences
Identifiers
urn:nbn:se:liu:diva-127279 (URN)10.1016/j.etap.2016.01.019 (DOI)000372763600023 ()26871964 (PubMedID)
Note

Funding Agencies|Natural Science Foundation of China [21577098, 41101499]; Fundamental Research Funds for the Central Universities [0400219213]; 111 Project

Available from: 2016-04-20 Created: 2016-04-19 Last updated: 2017-11-30
Zhang, Q., Tian, X., Wang, H., Hu, Z.-J., Wu, J., Zhou, H., . . . Uvdal, K. (2016). NIR-region two-photon fluorescent probes for Fe3+/Cu2+ ions based on pyrimidine derivatives with different flexible chain. Sensors and actuators. B, Chemical, 222, 574-578
Open this publication in new window or tab >>NIR-region two-photon fluorescent probes for Fe3+/Cu2+ ions based on pyrimidine derivatives with different flexible chain
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2016 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, E-ISSN 1873-3077, Vol. 222, p. 574-578Article in journal (Refereed) Published
Abstract [en]

Two novel NIR-region two-photon fluorescent probes CCP and COP, show strong fluorescence quenching and good ratiometric responses toward Fe3+ and Cu2+, respectively; and their two-photon fluorescence are reversible by the subsequent addition of EDTA. CCP and COP are valuable candidates for two-photon imaging in the biological transparency window. (C) 2015 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA, 2016
Keywords
Two-photon absorption; Pyrimidine; Multi-functional sensor; Metal ions
National Category
Physical Sciences
Identifiers
urn:nbn:se:liu:diva-122779 (URN)10.1016/j.snb.2015.08.079 (DOI)000363815800074 ()
Note

Funding Agencies|National Natural Science Foundation of China [21271004, 51372003, 51432001, 21271003, 21501001, 51072001, 51272001]; National Key Basic Research Program [2013CB632705]; Program for New Century Excellent Talents in University (China); CETV; China Postdoctoral Science Foundation [2015M571912]; Swedish Research Council (VR) [621-2013-5357]; Swedish Government strategic faculty grant in material science (SFO, MATLIU) in Advanced Functional Materials (AFM)

Available from: 2015-11-23 Created: 2015-11-23 Last updated: 2017-12-01
Zhang, Q., Tian, X., Hu, Z.-J., Brommesson, C., Wu, J., Zhou, H., . . . Uvdal, K. (2016). Nonlinear optical response and two-photon biological applications of a new family of imidazole-pyrimidine derivatives. Dyes and pigments, 126, 286-295
Open this publication in new window or tab >>Nonlinear optical response and two-photon biological applications of a new family of imidazole-pyrimidine derivatives
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2016 (English)In: Dyes and pigments, ISSN 0143-7208, E-ISSN 1873-3743, Vol. 126, p. 286-295Article in journal (Refereed) Published
Abstract [en]

A series of novel D-pi-A type two-photon absorption (2PA) imidazole-pyrimidine derivatives (EX-1 similar to EX-4) have been synthesized and characterized, with EX-1 was crystallography confirmed. Based on systematic photophysical investigations, the structure property relationships can be drawn as follows: (1) Both theoretical and experimental studies indicated that the different donor groups have large influences on the optical properties. (2) The 2PA cross-section values (sigma) were obtained both by Z-Scan and two photon excited fluorescence (2PEF) measurements. 2PA cross sections show an increasing trend with increasing electron-donating strength and the number of branches. (3) Comprehensively considered the optical performance, molecular volume, cytotoxicity and solubility, EX-1 and EX-2 were identified to be the best candidates for living cells (HepG2) imaging. Moreover, the 2PA excitable features of EX-1 and EX-2 are capable of imaging in fresh mouses liver tissues with a depth of ca. 70 mu m. (C) 2015 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCI LTD, 2016
Keywords
Two-photon absorption; Triphenylamine; Imidazole; Pyrimidine; Two-photon fluorescent microscopy; Z-Scan
National Category
Physical Sciences
Identifiers
urn:nbn:se:liu:diva-125797 (URN)10.1016/j.dyepig.2015.11.026 (DOI)000370090600035 ()
Note

Funding Agencies|National Natural Science Foundation of China [21501001, 21271004, 51372003, 51432001, 21271003, 51472003, 51272001]; National Key Basic Research Program 973 [2013CB632705]; Program for New Century Excellent Talents in University (China); Doctoral Program Foundation of Ministry of Education of China [20113401110004]; China Postdoctoral Science Foundation [2015M571912]; Swedish Research Council (VR) [621-2013-5357]; Swedish Government strategic faculty grant in material science (SFO, MATLIU) in Advanced Functional Materials (AFM); Wenner-Gren Foundations

Available from: 2016-03-08 Created: 2016-03-04 Last updated: 2018-03-20
Zhang, Q., Tian, X., Hu, Z.-J., Brommesson, C., Wu, J., Zhou, H., . . . Uvdal, K. (2015). A series of Zn(II) terpyridine complexes with enhanced two-photon-excited fluorescence for in vitro and in vivo bioimaging. Journal of materials chemistry. B, 3(36), 7213-7221
Open this publication in new window or tab >>A series of Zn(II) terpyridine complexes with enhanced two-photon-excited fluorescence for in vitro and in vivo bioimaging
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2015 (English)In: Journal of materials chemistry. B, ISSN 2050-750X, E-ISSN 2050-7518, Vol. 3, no 36, p. 7213-7221Article in journal (Refereed) Published
Abstract [en]

It is still a challenge to obtain two-photon excited fluorescent bioimaging probes with intense emission, high photo-stability and low cytotoxicity. In the present work, four Zn(II)-coordinated complexes (1-4) constructed from two novel D-A and D-p-A ligands (L-1 and L-2) are investigated both experimentally and theoretically, aiming to explore efficient two-photon probes for bioimaging. Molecular geometry optimization used for theoretical calculations is achieved using the crystallographic data. Notably, the results indicate that complexes 1 and 2 display enhanced two-photon absorption (2PA) cross sections compared to their corresponding D-A ligand (L1). Furthermore, it was found that complex 1 has the advantages of moderate 2PA cross section in the near-infrared region, longer fluorescence lifetime, higher quantum yield, good biocompatibility and enhanced two-photon excited fluorescence. Therefore, complex 1 is evaluated as a bioimaging probe for in vitro imaging of HepG2 cells, in which it is observed under a two-photon scanning microscope that complex 1 exhibits effective co-staining with endoplasmic reticulum (ER) and nuclear membrane; as well as for in vivo imaging of zebrafish larva, in which it is observed that complex 1 exhibits specificity in the intestinal system.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY, 2015
National Category
Physical Chemistry
Identifiers
urn:nbn:se:liu:diva-122077 (URN)10.1039/c5tb01185j (DOI)000360658000007 ()
Note

Funding Agencies|National Natural Science Foundation of China [51372003, 21271004, 51272001, 51472003, 51432001, 21271003]; Ministry of Education Funded Projects Focus on returned overseas scholar; Program for New Century Excellent Talents in University (China); Doctoral Program Foundation of Ministry of Education of China [20113401110004]; China Postdoctoral Science Foundation [2015M571912]; Swedish Research Council (VR) [621-2013-5357]; Swedish Government strategic faculty grant in materials science (SFO, MATLIU) in Advanced Functional Materials (AFM)

Available from: 2015-10-20 Created: 2015-10-19 Last updated: 2017-12-01
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