1
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Jiang J, Cao B, Chen Y, Luo H, Xue J, Xiong X, Zou T. Alkylgold(III) Complexes Undergo Unprecedented Photo-Induced β-Hydride Elimination and Reduction for Targeted Cancer Therapy. Angew Chem Int Ed Engl 2022; 61:e202201103. [PMID: 35165986 DOI: 10.1002/anie.202201103] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Indexed: 11/07/2022]
Abstract
Spatiotemporally controllable activation of prodrugs within tumors is highly desirable for cancer therapy to minimize toxic side effects. Herein we report that stable alkylgold(III) complexes can undergo unprecedented photo-induced β-hydride elimination, releasing alkyl ligands and forming gold(III)-hydride intermediates that could be quickly converted into bioactive [AuIII -S] adducts; meanwhile, the remaining alkylgold(III) complexes can photo-catalytically reduce [AuIII -S] into more bioactive AuI species. Such photo-reactivities make it possible to functionalize gold complexes on the auxiliary alkyl ligands without attenuating the metal-biomacromolecule interactions. As a result, the gold(III) complexes containing glucose-functionalized alkyl ligands displayed efficient and tumor-selective uptake; notably, after one- or two-photon activation, the complexes exhibited high thioredoxin reductase (TrxR) inhibition, potent cytotoxicity, and strong antiangiogenesis and antitumor activities in vivo.
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Affiliation(s)
- Jia Jiang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Bei Cao
- Warshel Institute for Computational Biology, and General Education Division, The Chinese University of Hong Kong, Shenzhen, 518172, P. R. China
| | - Yuting Chen
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Hejiang Luo
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Jiaying Xue
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Xiaolin Xiong
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
| | - Taotao Zou
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, 510006, P. R. China
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2
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Hruzd M, le Poul N, Cordier M, Kahlal S, Saillard JY, Achelle S, Gauthier S, Robin-le Guen F. Luminescent cyclometalated alkynylplatinum(II) complexes with 1,3-di(pyrimidin-2-yl)benzene ligands: synthesis, electrochemistry, photophysics and computational studies. Dalton Trans 2022; 51:5546-5560. [PMID: 35302571 DOI: 10.1039/d1dt04237h] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this article, we report on a series of cyclometalated chloro- and alkynyl-platinum(II) complexes bearing various tridentate N^C^N-cyclometalated ligands derived from 1,3-bis(pyrimidin-2-yl)benzene. The X-ray crystal structures of two alkynyl-platinum(II) complexes were determined and other structures were DFT-calculated. Electrochemical and DFT-computational studies suggest a ligand-centred reduction on the R1-substituted N^C^N ligand, whereas oxidation likely occurs either on the Pt-phenylacetylide moiety and/or the cyclometalated ligand. In CH2Cl2 solution at room temperature, the complexes show phosphorescent emissions ranging from green to orange, depending on the R1 and R2 substituents on the ligands. In KBr solid state matrix, excluding complexes bearing a trifluoromethyl substituted ligand, all compounds exhibit red emission. The presence of an alkynyl ancillary ligand has limited influence on absorption and emission spectra except in the case of the complex with the strongly electron-donating diphenylamino R2 substituent on the alkynyl ligand, for which a significant red-shift was observed. The alkynyl Pt(II) complex with OMe groups as both R1 and R2 substituents shows the best emission quantum yield (0.81 in CH2Cl2 solution) in this series. The full series of DFT calculated band gaps correlated generally well with the electrochemical and absorption data and reasonably model the impact of the substituents on the electronics of these complexes.
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Affiliation(s)
- Mariia Hruzd
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France.
| | - Nicolas le Poul
- Laboratoire de Chimie, Électrochimie Moléculaires et Chimie Analytique, UMR CNRS 6521, Université de Bretagne Occidentale, UFR Sciences et Techniques, 6 avenue Victor Le Gorgeu - CS 93837, F-29238 Brest Cedex 3, France
| | - Marie Cordier
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France.
| | - Samia Kahlal
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France.
| | - Jean-Yves Saillard
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France.
| | - Sylvain Achelle
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France.
| | - Sébastien Gauthier
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France.
| | - Françoise Robin-le Guen
- Univ. Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, F-35000 Rennes, France.
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3
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Jiang J, Cao B, Chen Y, Luo H, Xue J, Xiong X, Zou T. Alkylgold(III) Complexes Undergo Unprecedented Photo‐Induced β‐Hydride Elimination and Reduction for Targeted Cancer Therapy. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jia Jiang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-Sen University Guangzhou 510006 P. R. China
| | - Bei Cao
- Warshel Institute for Computational Biology and General Education Division The Chinese University of Hong Kong Shenzhen 518172 P. R. China
| | - Yuting Chen
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-Sen University Guangzhou 510006 P. R. China
| | - Hejiang Luo
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-Sen University Guangzhou 510006 P. R. China
| | - Jiaying Xue
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-Sen University Guangzhou 510006 P. R. China
| | - Xiaolin Xiong
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-Sen University Guangzhou 510006 P. R. China
| | - Taotao Zou
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical Sciences Sun Yat-Sen University Guangzhou 510006 P. R. China
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4
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Lee S, Lee Y, Kim K, Heo S, Jeong DY, Kim S, Cho J, Kim C, You Y. Twist to Boost: Circumventing Quantum Yield and Dissymmetry Factor Trade-Off in Circularly Polarized Luminescence. Inorg Chem 2021; 60:7738-7752. [PMID: 33760606 DOI: 10.1021/acs.inorgchem.1c00070] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Circularly polarized luminescence (CPL) enables promising applications in asymmetric photonics. However, the performances of CPL molecules do not yet meet the requirements of these applications. The shortcoming originates from the trade-off in CPL between the photoluminescence quantum yield (PLQY) and the photoluminescence dissymmetry factor (gPL). In this study, we developed a molecular strategy to circumvent this trade-off. Our approach takes advantage of the strong propensity of [Pt(N^C^N)Cl], where the N^C^N ligand is 1-(2-oxazoline)-3-(2-pyridyl)phenylate, to form face-to-face stacks. We introduced chiral substituents, including (S)-methyl, (R)- and (S)-isopropyl, and (S)-indanyl groups, into the ligand framework. This asymmetric control induces torsional displacements that give homohelical stacks of the Pt(II) complexes. X-ray single-crystal structure analyses for the (S)-isopropyl Pt(II) complex reveal the formation of a homohelical dimer with a Pt···Pt distance of 3.48 Å, which is less than the sum of the van der Waals radii of Pt. This helical stack elicits the metal-metal-to-ligand charge-transfer (MMLCT) transition that exhibits strong chiroptical activity due to the electric transition moment making an acute angle to the magnetic transition moment. The PLQY and gPL values of the MMLCT phosphorescence emission of the (S)-isopropyl Pt(II) complex are 0.49 and 8.4 × 10-4, which are improved by factors of ca. 6 and 4, respectively, relative to the values of the unimolecular emission (PLQY, 0.078; gPL, 2.4 × 10-4). Our photophysical measurements for the systematically controlled Pt(II) complexes reveal that the CPL amplifications depend on the chiral substituent. Our investigations also indicate that excimers are not responsible for the enhanced chiroptical activity. To demonstrate the effectiveness of our approach, organic electroluminescence devices were fabricated. The MMLCT emission devices were found to exhibit simultaneous enhancements in the external quantum efficiency (EQE, 9.7%) and the electroluminescence dissymmetry factor (gEL, 1.2 × 10-4) over the unimolecular emission devices (EQE, 5.8%; gEL, 0.3 × 10-4). These results demonstrate the usefulness of using the chiroptically active MMLCT emission for achieving an amplified CPL.
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Affiliation(s)
- Sumin Lee
- Division of Chemical Engineering and Materials Science, and Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Yongmoon Lee
- Graduate School of Convergence Science and Technology, and Inter-University Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Kyungmin Kim
- Department of Emerging Materials Science, DGIST, Daegu 42988, Republic of Korea
| | - Seunga Heo
- Division of Chemical Engineering and Materials Science, and Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Dong Yeun Jeong
- Division of Chemical Engineering and Materials Science, and Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Sangsub Kim
- Graduate School of Convergence Science and Technology, and Inter-University Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Jaeheung Cho
- Department of Emerging Materials Science, DGIST, Daegu 42988, Republic of Korea.,Department of Chemistry, UNIST, Ulsan 44919, Republic of Korea
| | - Changsoon Kim
- Graduate School of Convergence Science and Technology, and Inter-University Semiconductor Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Youngmin You
- Division of Chemical Engineering and Materials Science, and Graduate Program in System Health Science and Engineering, Ewha Womans University, Seoul 03760, Republic of Korea
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5
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Quan J, Chen ZH, Zhang X, Wang JY, Zhang LY, Chen ZN. Geometrically isomeric Pt 2Ag 2 acetylide complexes of 2,6-bis(diphenylphosphino)pyridine: luminescent and vapochromic properties. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00111f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Geometrically isomeric cis- and trans-Pt2Ag2 alkynyl complexes are characterized by X-ray crystallography with trans-isomers showing bright phosphorescence and interesting vaporchromic properties.
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Affiliation(s)
- Jian Quan
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Zhong-Hui Chen
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Xu Zhang
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Jin-Yun Wang
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Li-Yi Zhang
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Zhong-Ning Chen
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
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6
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Zhao A, Cai W, Wu X, Shen W. Unveiling the relationship between the phosphorescent quantum yield and structural modification to construct high-performance Pt(II) complex. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119861] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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7
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Wang Q, Xiao H, Wu Y, Wang ZY, Zheng DS, Chen ZN. From homonuclear to heteronuclear: a viable strategy to promote and modulate phosphorescence. Chem Commun (Camb) 2020; 56:10607-10620. [DOI: 10.1039/d0cc04021e] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of weakly emissive homonuclear Pt(ii) precursors to fabricate Pt–M heteronuclear complexes with intermetallic contacts paves a unique avenue to achieve highly efficient phosphorescence as well as modulate emission energy.
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Affiliation(s)
- Qian Wang
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Hui Xiao
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Yue Wu
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Zhao-Yi Wang
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Da-Sheng Zheng
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Zhong-Ning Chen
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
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8
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Zhao A, Cai W, Yan X, Zhang H, Wang J, Shen W. Theoretical insights into the effect of ligands on platinum(ii) complexes with a bidentate bis(o-carborane) ligand structure. Photochem Photobiol Sci 2019; 18:2421-2429. [PMID: 31369026 DOI: 10.1039/c9pp00251k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carboranes feature a wealth of unique structures and properties in phosphorescent transition-metal complexes (PTMCs). Herein, we identify the influence between the electronic structure in carboranes and the main ligand based on the density functional theory (DFT) and time-dependent density functional theory (TD-DFT), which affects the phosphorescence properties of carborane-containing Pt compounds. Furthermore, the mechanism, including singlet-triplet splitting energies ΔE(Sn - T1), transition dipole moment for S0 - Sn transitions, the zero-field splitting (ZFS), the radiative decay rate constant (kr), the Huang-Rhys factor (S), and the spin-orbit coupling (SOC) matrix elements <T1|HSOC|Sn> have been carefully investigated. The results presented here reveal the functional action 1,1'-bis(o-carborane) contributes to the emission process owing to the manipulation of main ligand dtb-bpy and complex 1a shows promising prospects for achieving highly efficient phosphorescence via engineering the conjugation of the main ligand dtb-bpy.
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Affiliation(s)
- Ancong Zhao
- School of Chemistry and Chemical Engineering, Southwest University, Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Chongqing, 400715, China.
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9
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Wang X, Zhang J, Zhu X, Ren T, Wang L. Influence of different ancillary ligand on the phosphorescent properties of platinum(II) complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 204:340-347. [PMID: 29957412 DOI: 10.1016/j.saa.2018.06.071] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 06/16/2018] [Accepted: 06/18/2018] [Indexed: 06/08/2023]
Abstract
In past two decades, lots of bidentate Pt(II) complexes are developed as potential organic light emitting diodes due to their simple synthetic process. The relative low quantum efficiency is one of the major blocks for their applications. Two new heteroleptic Pt(II) complexes bearing an n-hexyloxy substituted phenyllepidine-based ligand and either a picolinate (pic) (1) or acetylacetonate (acac) (2) ancillary ligand are synthesized as orange-red-emitter by Wawrzinek and coauthors. The quantum efficiency of 2 is much larger than that of 1 indicating that the variation of ancillary ligand has a great effect on the performance. Inspired by it, other two new bidentate Pt(II) complexes are theoretically designed with the same primary ligand along with pyrazolone (pzl) (3) or N-substituted carbazole (NCaz) (4) ancillary ligand. The phosphorescent properties are explored by density functional theory (DFT) and time dependent DFT (TDDFT) methods with the ultimate goal to explore the influence of ancillary ligand. Moreover, the emission rule is confirmed. Finally, the quantum yield is estimated according to the radiative rate constant (kr) and nonradiative rate constant (knr). The smaller knr is the vital item to determine the high quantum yield.
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Affiliation(s)
- Xin Wang
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, PR China; College of Chemistry and Chemical Engineering, Zhoukou Normal University, Zhoukou, Henan 466001, PR China
| | - Jingshun Zhang
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, PR China
| | - Xinrui Zhu
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, PR China
| | - Tiegang Ren
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, PR China.
| | - Li Wang
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, PR China.
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10
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Chan KC, Tong KM, Cheng SC, Ng CO, Yiu SM, Ko CC. Design of Luminescent Isocyano Rhenium(I) Complexes: Photophysics and Effects of the Ancillary Ligands. Inorg Chem 2018; 57:13963-13972. [DOI: 10.1021/acs.inorgchem.8b02536] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kin-Cheung Chan
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Ka-Ming Tong
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Shun-Cheung Cheng
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Chi-On Ng
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Shek-Man Yiu
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Chi-Chiu Ko
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
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11
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Cheng Y, Li L, Wei F, Wong KMC. Alkynylplatinum(II) Terpyridine System Coupled with Rhodamine Derivative: Interplay of Aggregation, Deaggregation, and Ring-Opening Processes for Ratiometric Luminescence Sensing. Inorg Chem 2018; 57:6439-6446. [DOI: 10.1021/acs.inorgchem.8b00448] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yukun Cheng
- Department of Chemistry, Southern University of Science and Technology, No. 1088, Tangchang Boulevard, Nanshan District, Shenzhen 518055, P. R. China
| | - Ling Li
- Department of Chemistry, Southern University of Science and Technology, No. 1088, Tangchang Boulevard, Nanshan District, Shenzhen 518055, P. R. China
| | - Fangfang Wei
- Department of Chemistry, Southern University of Science and Technology, No. 1088, Tangchang Boulevard, Nanshan District, Shenzhen 518055, P. R. China
| | - Keith Man-Chung Wong
- Department of Chemistry, Southern University of Science and Technology, No. 1088, Tangchang Boulevard, Nanshan District, Shenzhen 518055, P. R. China
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12
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Cho YJ, Kim SY, Son HJ, Cho DW, Kang SO. Steric effect on excimer formation in planar Pt(ii) complexes. Phys Chem Chem Phys 2018; 19:5486-5494. [PMID: 28165085 DOI: 10.1039/c6cp08651a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
In order to understand the steric influence on excimer formation in square planar metal complexes, three different Pt(ii) complexes were prepared by modifying the substituents in the main ligand: Pt(ii)(dfppy)(acac) (Pt-1, where dfppy is difluorophenylpyridine, acac is acetylacetonate); the bulky triphenyl silyl (Ph3Si-) group was substituted at the pyridine moiety (Pt-2) and at the phenyl moiety (Pt-3) of the main ligand of Pt-1. The Pt-complexes showed sky-blue emission at ∼460 nm. In addition, Pt-1 and Pt-3 showed excimer emission at ∼600 nm in the concentrated solution and the solid sample. The emission lifetimes and intensities for monomeric Pt-1 and Pt-3 showed strong concentration dependence. Indeed, the lifetime of the monomer was reduced in highly concentrated solutions due to excimer formation. The intrinsic emission lifetimes were determined as 364 ns (Pt-1) and 300 ns (Pt-3) by Stern-Volmer analysis, considering the self-quenched lifetime of monomer emission. Pt-2 did not show any excimer emission in the concentrated solution or solid sample. The crystal structures of Pt-1 and Pt-3 were analysed by X-ray crystallographic measurements. The results revealed that the LUMO moiety closely overlapped with that of another Pt-complex. In this study, based on the influence of steric hindrance of the bulky Ph3Si group, we concluded that the LUMO-LUMO interaction between the pyridine moieties of the main ligand is the main factor responsible for excimer formation.
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Affiliation(s)
- Yang-Jin Cho
- Department of Advanced Materials Chemistry, Korea University (Sejong), Sejong, 30019, South Korea.
| | - So-Yoen Kim
- Department of Advanced Materials Chemistry, Korea University (Sejong), Sejong, 30019, South Korea.
| | - Ho-Jin Son
- Department of Advanced Materials Chemistry, Korea University (Sejong), Sejong, 30019, South Korea.
| | - Dae Won Cho
- Department of Advanced Materials Chemistry, Korea University (Sejong), Sejong, 30019, South Korea. and Center for Photovoltaic Materials, Korea University (Sejong), Sejong, 30019, South Korea.
| | - Sang Ook Kang
- Department of Advanced Materials Chemistry, Korea University (Sejong), Sejong, 30019, South Korea.
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13
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Sesolis H, Chan CKM, Gontard G, Fu HLK, Yam VWW, Amouri H. Dinuclear (N∧C∧N) Pincer Pt(II) Complexes with Bridged Organometallic Linkers: Synthesis, Structures, Self-Aggregation, and Photophysical Properties. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00680] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hugo Sesolis
- Sorbonne Universités, UPMC Université Paris 06, and CNRS, IPCM UMR 8232, , 4 place Jussieu, Paris CEDEX 05 75252, France
| | - Carmen Ka-Man Chan
- Institute
of Molecular Functional Materials (Areas of Excellence Scheme, University
Grants Committee, Hong Kong) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China
| | - Geoffrey Gontard
- Sorbonne Universités, UPMC Université Paris 06, and CNRS, IPCM UMR 8232, , 4 place Jussieu, Paris CEDEX 05 75252, France
| | - Heidi Li-Ki Fu
- Institute
of Molecular Functional Materials (Areas of Excellence Scheme, University
Grants Committee, Hong Kong) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China
| | - Vivian Wing-Wah Yam
- Institute
of Molecular Functional Materials (Areas of Excellence Scheme, University
Grants Committee, Hong Kong) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, PR China
| | - Hani Amouri
- Sorbonne Universités, UPMC Université Paris 06, and CNRS, IPCM UMR 8232, , 4 place Jussieu, Paris CEDEX 05 75252, France
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14
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Lee CH, Tang MC, Wong YC, Chan MY, Yam VWW. Sky-Blue-Emitting Dendritic Alkynylgold(III) Complexes for Solution-Processable Organic Light-Emitting Devices. J Am Chem Soc 2017; 139:10539-10550. [DOI: 10.1021/jacs.7b05872] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Chin-Ho Lee
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Man-Chung Tang
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Yi-Chun Wong
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Mei-Yee Chan
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Vivian Wing-Wah Yam
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
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15
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Xing LB, Qiao F, Yuan Z, Zhang JL, Zhang RY, Zhuo S, Zhou ZY. Binuclear alkynylplatinum(ii) terpyridine complexes with flexible bridges behave as organogelators for several organic solvents. RSC Adv 2017. [DOI: 10.1039/c7ra00208d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
New binuclear alkynylplatinum(ii) terpyridyl complexes with flexible bridges have been synthesized and characterized by 1H NMR, mass spectra and elemental analysis.
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Affiliation(s)
- Ling-Bao Xing
- Key Laboratory of Colloid and Interface Chemistry
- Key Laboratory of Special Aggregated Materials
- Ministry of Education
- Shandong University
- Jinan 250100
| | - Fei Qiao
- School of Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Zhao Yuan
- School of Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Jing-Li Zhang
- School of Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Rui-Ying Zhang
- School of Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Shuping Zhuo
- School of Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Zi-Yan Zhou
- School of Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
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16
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Application of five-membered ring products of cyclometalation reactions as sensing materials in sensing devices. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.09.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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17
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Synthesis, structures and photophysical properties of copper(I) 2-(2-benzimidazolyl)-6-methylpyridine complexes with different diphosphine ligands. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.09.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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18
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Xu Y, Luo Y, Li M, He R, Shen W. Theoretical Insights into the Photo-Deactivation of Emitting Triplet Excited State of (C^N)Pt(O^O) Complexes: Radiative and Nonradiative Decay Processes. J Phys Chem A 2016; 120:6813-21. [DOI: 10.1021/acs.jpca.6b03575] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yanyan Xu
- School of Chemistry, Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Yafei Luo
- School of Chemistry, Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Ming Li
- School of Chemistry, Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Rongxing He
- School of Chemistry, Chemical
Engineering, Southwest University, Chongqing 400715, China
| | - Wei Shen
- School of Chemistry, Chemical
Engineering, Southwest University, Chongqing 400715, China
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19
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Wang GX, Feng K, Crossley MJ, Xing LB, Xiao HY, Li W, Tung CH, Wu LZ. Conformation-Controlled Diplatinum(II)-Ferrocene Dyads to Achieve Long-Lived Charge-Separated States. Chemistry 2016; 22:11962-6. [PMID: 27339465 DOI: 10.1002/chem.201601085] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 06/11/2016] [Indexed: 11/07/2022]
Abstract
Square-planar polypyridyl platinum(II) complexes possess a rich range of structural and spectroscopic properties that are ideal for designing artificial photosynthetic centers. Taking advantage of the directionality in the charge-transfer excitation from the metal to the polypyridyl ligand, we describe here diplatinum(II)-ferrocene dyads, open-butterfly-like dyad 1 and closed-butterfly-like dyad 2, which were designed to understand the conformation and orientation effects to prolong the lifetime of charge-separated state. In contrast to the open-butterfly-like dyad 1, the closed-butterfly-like dyad 2 shows three-times long lifetime of charge separated state upon photoexcitation, demonstrating that the orientation in the rigid structure of dyad 2 is a very important issue to achieve long-lived charge separated state.
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Affiliation(s)
- Ge-Xia Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100080, P. R. China
| | - Ke Feng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100080, P. R. China
| | | | - Ling-Bao Xing
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100080, P. R. China
| | - Hong-Yan Xiao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100080, P. R. China
| | - Wen Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100080, P. R. China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100080, P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100080, P. R. China.
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20
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Tang MC, Chan AKW, Chan MY, Yam VWW. Platinum and Gold Complexes for OLEDs. Top Curr Chem (Cham) 2016; 374:46. [PMID: 27573398 DOI: 10.1007/s41061-016-0046-y] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 06/14/2016] [Indexed: 12/20/2022]
Abstract
Encouraging efforts on the design of high-performance organic materials and smart architecture during the past two decades have made organic light-emitting device (OLED) technology an important competitor for the existing liquid crystal displays. Particularly, the development of phosphorescent materials based on transition metals plays a crucial role for this success. Apart from the extensively studied iridium(III) complexes with d(6) electronic configuration and octahedral geometry, the coordination-unsaturated nature of d(8) transition metal complexes with square-planar structures has been found to provide intriguing spectroscopic and luminescence properties. This article briefly summarizes the development of d(8) platinum(II) and gold(III) complexes and their application studies in the fabrication of phosphorescent OLEDs. An in-depth understanding of the nature of the excited states has offered a great opportunity to fine-tune the emission colors covering the entire visible spectrum as well as to improve their photophysical properties. With good device engineering, high performance vacuum-deposited OLEDs with external quantum efficiencies (EQEs) of up to 30 % and solution-processable OLEDs with EQEs of up to 10 % have been realized by modifying the cyclometalated or pincer ligands of these metal complexes. These impressive demonstrations reveal that d(8) metal complexes are promising candidates as phosphorescent materials for OLED applications in displays as well as in solid-state lighting in the future.
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Affiliation(s)
- Man-Chung Tang
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Alan Kwun-Wa Chan
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Mei-Yee Chan
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Vivian Wing-Wah Yam
- Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
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21
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Kong FKW, Tang MC, Wong YC, Chan MY, Yam VWW. Design Strategy for High-Performance Dendritic Carbazole-Containing Alkynylplatinum(II) Complexes and Their Application in Solution-Processable Organic Light-Emitting Devices. J Am Chem Soc 2016; 138:6281-91. [DOI: 10.1021/jacs.6b02632] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Fred Ka-Wai Kong
- Department of Chemistry, The University of Hong Kong, Pokfulam
Road, Hong Kong, China
| | - Man-Chung Tang
- Department of Chemistry, The University of Hong Kong, Pokfulam
Road, Hong Kong, China
| | - Yi-Chun Wong
- Department of Chemistry, The University of Hong Kong, Pokfulam
Road, Hong Kong, China
| | - Mei-Yee Chan
- Department of Chemistry, The University of Hong Kong, Pokfulam
Road, Hong Kong, China
| | - Vivian Wing-Wah Yam
- Department of Chemistry, The University of Hong Kong, Pokfulam
Road, Hong Kong, China
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22
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Bachmann M, Suter D, Blacque O, Venkatesan K. Tunable and Efficient White Light Phosphorescent Emission Based on Single Component N-Heterocyclic Carbene Platinum(II) Complexes. Inorg Chem 2016; 55:4733-45. [DOI: 10.1021/acs.inorgchem.5b02962] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael Bachmann
- Department of Chemistry, University of Zurich, Winterthurerstrasse
190, CH-8057, Zurich, Switzerland
| | - Dominik Suter
- Department of Chemistry, University of Zurich, Winterthurerstrasse
190, CH-8057, Zurich, Switzerland
| | - Olivier Blacque
- Department of Chemistry, University of Zurich, Winterthurerstrasse
190, CH-8057, Zurich, Switzerland
| | - Koushik Venkatesan
- Department of Chemistry, University of Zurich, Winterthurerstrasse
190, CH-8057, Zurich, Switzerland
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23
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Carroll J, Woolard HG, Mroz R, Nason CA, Huo S. Regiospecific Acylation of Cycloplatinated Complexes: Scope, Limitations, and Mechanistic Implications. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00174] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jeffrey Carroll
- Department of Chemistry, East Carolina University, Greenville, North Carolina 27858, United States
| | - Hannah G. Woolard
- Department of Chemistry, East Carolina University, Greenville, North Carolina 27858, United States
| | - Robert Mroz
- Department of Chemistry, East Carolina University, Greenville, North Carolina 27858, United States
| | - Charles A. Nason
- Department of Chemistry, East Carolina University, Greenville, North Carolina 27858, United States
| | - Shouquan Huo
- Department of Chemistry, East Carolina University, Greenville, North Carolina 27858, United States
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24
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Allampally NK, Mayoral MJ, Chansai S, Lagunas MC, Hardacre C, Stepanenko V, Albuquerque RQ, Fernández G. Control over the Self-Assembly Modes of Pt(II) Complexes by Alkyl Chain Variation: From Slipped to Parallel π-Stacks. Chemistry 2016; 22:7810-6. [PMID: 27113990 DOI: 10.1002/chem.201600176] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Indexed: 12/13/2022]
Abstract
We report the self-assembly of a new family of hydrophobic, bis(pyridyl) Pt(II) complexes featuring an extended oligophenyleneethynylene-derived π-surface appended with six long (dodecyloxy (2)) or short (methoxy (3)) side groups. Complex 2, containing dodecyloxy chains, forms fibrous assemblies with a slipped arrangement of the monomer units (dPt⋅⋅⋅Pt ≈14 Å) in both nonpolar solvents and the solid state. Dispersion-corrected PM6 calculations suggest that this organization is driven by cooperative π-π, C-H⋅⋅⋅Cl and π-Pt interactions, which is supported by EXAFS and 2D NMR spectroscopic analysis. In contrast, nearly parallel π-stacks (dPt⋅⋅⋅Pt ≈4.4 Å) stabilized by multiple π-π and C-H⋅⋅⋅Cl contacts are obtained in the crystalline state for 3 lacking long side chains, as shown by X-ray analysis and PM6 calculations. Our results reveal not only the key role of alkyl chain length in controlling self-assembly modes but also show the relevance of Pt-bound chlorine ligands as new supramolecular synthons.
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Affiliation(s)
- Naveen Kumar Allampally
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - María José Mayoral
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Departamento de Química Orgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Sarayute Chansai
- School of Chemistry and Chemical Engineering, Queen's Universtity Belfast, Stranmillis Road, Belfast, BT9 5AG, United Kingdom
| | - María Cristina Lagunas
- School of Chemistry and Chemical Engineering, Queen's Universtity Belfast, Stranmillis Road, Belfast, BT9 5AG, United Kingdom
| | - Christopher Hardacre
- School of Chemistry and Chemical Engineering, Queen's Universtity Belfast, Stranmillis Road, Belfast, BT9 5AG, United Kingdom
| | - Vladimir Stepanenko
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Rodrigo Q Albuquerque
- São Carlos Institute of Chemistry, University of São Paulo, A, v. Trab. São-Carlense, 400, 13560-970, São Carlos-SP, Brazil
| | - Gustavo Fernández
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany. .,Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany.
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25
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Kim KH, Liao JL, Lee SW, Sim B, Moon CK, Lee GH, Kim HJ, Chi Y, Kim JJ. Crystal Organic Light-Emitting Diodes with Perfectly Oriented Non-Doped Pt-Based Emitting Layer. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:2526-2532. [PMID: 26833629 DOI: 10.1002/adma.201504451] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 11/17/2015] [Indexed: 06/05/2023]
Abstract
Organic light-emitting diodes with external quantum efficiency of 38.8% are realized using a Pt-based thin-film emitting layer with photoluminescence quantum yield of 96% and transition dipole ratio of 93%. The emitting dipole orientation of the thin films fabricated using Pt complexes is investigated and the structural relationship between X-ray structural analysis and the structures in thin films are discussed based on quantum chemical calculations.
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Affiliation(s)
- Kwon-Hyeon Kim
- WCU Hybrid Materials Program, Department of Materials Science and Engineering and the Center for Organic Light Emitting Diode, Seoul National University, Seoul, 151-742, South Korea
| | - Jia-Ling Liao
- Department of Chemistry and Low Carbon Energy Research Center, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Si Woo Lee
- Department of Organic Material Science and Engineering, Pusan National University, Busan, 609-755, Korea
| | - Bomi Sim
- WCU Hybrid Materials Program, Department of Materials Science and Engineering and the Center for Organic Light Emitting Diode, Seoul National University, Seoul, 151-742, South Korea
| | - Chang-Ki Moon
- WCU Hybrid Materials Program, Department of Materials Science and Engineering and the Center for Organic Light Emitting Diode, Seoul National University, Seoul, 151-742, South Korea
| | - Gene-Hsiang Lee
- Instrumentation Center, National Taiwan University, Taipei, 10617, Taiwan
| | - Hyo Jung Kim
- Department of Organic Material Science and Engineering, Pusan National University, Busan, 609-755, Korea
| | - Yun Chi
- Department of Chemistry and Low Carbon Energy Research Center, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Jang-Joo Kim
- WCU Hybrid Materials Program, Department of Materials Science and Engineering and the Center for Organic Light Emitting Diode, Seoul National University, Seoul, 151-742, South Korea
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26
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Li K, Ming Tong GS, Wan Q, Cheng G, Tong WY, Ang WH, Kwong WL, Che CM. Highly phosphorescent platinum(ii) emitters: photophysics, materials and biological applications. Chem Sci 2016; 7:1653-1673. [PMID: 30155012 PMCID: PMC6090519 DOI: 10.1039/c5sc03766b] [Citation(s) in RCA: 331] [Impact Index Per Article: 41.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Accepted: 11/27/2015] [Indexed: 01/06/2023] Open
Abstract
The structural effects of ligands on the emission properties of Pt(ii) complexes and promising applications of luminescent Pt(ii) complexes in various areas are discussed.
In recent years a blossoming interest in the synthesis, photophysics and application of phosphorescent Pt(ii) complexes, particularly on their uses in bioimaging, photocatalysis and phosphorescent organic light-emitting diodes (OLEDs), has been witnessed. The superior performance of phosphorescent Pt(ii) complexes in these applications is linked to their diverse spectroscopic and photophysical properties, which can be systematically modulated by appropriate choices of auxiliary ligands. Meanwhile, an important criterion for the practical application of phosphorescent metal complexes is their stability which is crucial for biological utilization and industrial OLED applications. Taking both the luminescence properties and stability into consideration, chelating ligands having rigid scaffolds and with strong σ-donor atoms are advantageous for the construction of highly robust phosphorescent Pt(ii) complexes. The square-planar coordination geometry endows Pt(ii) complexes with the intriguing spectroscopic and photophysical properties associated with their intermolecular interactions in both the ground and excited states. In this article, we discuss the design and synthesis of phosphorescent Pt(ii) complexes with elaboration on the effects of ligands on the structure and luminescence properties. Based on their photophysical and emission properties, we intend to shed light on the great promise of highly robust phosphorescent Pt(ii) emitters in an array of applications from molecular materials to biosensors.
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Affiliation(s)
- Kai Li
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China . .,HKU Shenzhen Institute of Research and Innovation , Shenzhen 518053 , China
| | - Glenna So Ming Tong
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China .
| | - Qingyun Wan
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China .
| | - Gang Cheng
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China . .,HKU Shenzhen Institute of Research and Innovation , Shenzhen 518053 , China
| | - Wai-Yip Tong
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China .
| | - Wai-Hung Ang
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China .
| | - Wai-Lun Kwong
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China .
| | - Chi-Ming Che
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , HKU-CAS Joint Laboratory on New Materials and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China . .,HKU Shenzhen Institute of Research and Innovation , Shenzhen 518053 , China
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27
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Nishihara K, Ueda M, Higashitani A, Nakao Y, Arikawa Y, Horiuchi S, Sakuda E, Umakoshi K. Different structural preference of Ag(i) and Au(i) in neutral and cationic luminescent heteropolynuclear platinum(ii) complexes: Z (U)-shaped Pt2M2 type vs. trinuclear PtM2 type. Dalton Trans 2016; 45:4978-82. [DOI: 10.1039/c6dt00320f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The structural preference and photophysical properties of heteropolynuclear Pt(ii) complexes are reported.
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Affiliation(s)
- Kazuki Nishihara
- Division of Chemistry and Materials Science
- Graduate School of Engineering
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Misa Ueda
- Division of Chemistry and Materials Science
- Graduate School of Engineering
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Ami Higashitani
- Division of Chemistry and Materials Science
- Graduate School of Engineering
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Yoshihide Nakao
- Department of Applied Chemistry and Biochemistry
- Faculty of Engineering
- Kyushu Sangyo University
- Fukuoka 813-8503
- Japan
| | - Yasuhiro Arikawa
- Division of Chemistry and Materials Science
- Graduate School of Engineering
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Shinnosuke Horiuchi
- Division of Chemistry and Materials Science
- Graduate School of Engineering
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Eri Sakuda
- Division of Chemistry and Materials Science
- Graduate School of Engineering
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Keisuke Umakoshi
- Division of Chemistry and Materials Science
- Graduate School of Engineering
- Nagasaki University
- Nagasaki 852-8521
- Japan
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28
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Xiang Y, Li W, Fang Y, Zhang D, Li X, Jin W. Construction and luminescence property of a highly ordered 2D self-assembled amphiphilic bidentate organoplatinum(ii) complex. RSC Adv 2016. [DOI: 10.1039/c6ra03553a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A red luminescent film was constructed by self-assembly of 1-Pt from methanol. The film on a substrate, exhibiting multi-stimuli responsiveness, was further obtained.
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Affiliation(s)
- Yunjie Xiang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
| | - Wenjing Li
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
| | - Yuxi Fang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
| | - Dengqing Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
| | - Xianying Li
- School of Environmental Science and Engineering
- Donghua University
- Shanghai 201620
- P. R. China
| | - Wusong Jin
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Chemistry
- Chemical Engineering and Biotechnology
- Donghua University
- Shanghai 201620
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29
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Moussa J, Freeman GR, Williams JAG, Chamoreau LM, Herson P, Amouri H. Synthesis and Luminescence Properties of Cycloplatinated Complexes with a Chelating N∧C Pyridine-Derived N-Heterocyclic Carbene - Influence of 2,4,6-Triphenylphosphinine versus Triphenylphosphine. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500879] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Sivchik VV, Solomatina AI, Chen YT, Karttunen AJ, Tunik SP, Chou PT, Koshevoy IO. Halogen Bonding to Amplify Luminescence: A Case Study Using a Platinum Cyclometalated Complex. Angew Chem Int Ed Engl 2015; 54:14057-60. [PMID: 26403269 DOI: 10.1002/anie.201507229] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Indexed: 12/31/2022]
Abstract
The cocrystallization of a weakly luminescent platinum complex [Pt(btpy)(PPh3)Cl](1) (Hbtpy=2-(2benzothienyl)pyridine; emission quantum yield Φem=0.03) with fluorinated bromo- and iodoarenes C6F6-nXn (X=Br, I; n=1, 2) results in the formation of efficient halogen-bonding (XB) interactions Pt-Cl⋅⋅⋅X-R. An up to 22-fold enhancement (Φem =0.65) in the luminescence intensity of the cocrystallized compound is detected, without a substantial change of the emission energy. Based on crystallographic, photophysical, and theoretical investigations, the contribution of the XB donors C6F6-n Xn to the amplification of luminescence intensity is attributed to the enhancement of spin-orbit coupling through the heavy-atom effect, and simultaneously to the suppression of the nonradiative relaxation pathways by increasing the rigidity of the chromophore center.
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Affiliation(s)
- Vasily V Sivchik
- Department of Chemistry, University of Eastern Finland, 80101 Joensuu (Finland)
| | - Anastasia I Solomatina
- Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504 St. Petersburg (Russia)
| | - Yi-Ting Chen
- Department of Chemistry, National Taiwan University, Taipei 106 (Taiwan)
| | | | - Sergey P Tunik
- Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504 St. Petersburg (Russia)
| | - Pi-Tai Chou
- Department of Chemistry, National Taiwan University, Taipei 106 (Taiwan).
| | - Igor O Koshevoy
- Department of Chemistry, University of Eastern Finland, 80101 Joensuu (Finland).
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31
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Sivchik VV, Solomatina AI, Chen Y, Karttunen AJ, Tunik SP, Chou P, Koshevoy IO. Halogen Bonding to Amplify Luminescence: A Case Study Using a Platinum Cyclometalated Complex. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507229] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Vasily V. Sivchik
- Department of Chemistry, University of Eastern Finland, 80101 Joensuu (Finland)
| | - Anastasia I. Solomatina
- Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504 St. Petersburg (Russia)
| | - Yi‐Ting Chen
- Department of Chemistry, National Taiwan University, Taipei 106 (Taiwan)
| | | | - Sergey P. Tunik
- Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504 St. Petersburg (Russia)
| | - Pi‐Tai Chou
- Department of Chemistry, National Taiwan University, Taipei 106 (Taiwan)
| | - Igor O. Koshevoy
- Department of Chemistry, University of Eastern Finland, 80101 Joensuu (Finland)
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32
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Yam VWW, Au VKM, Leung SYL. Light-Emitting Self-Assembled Materials Based on d8 and d10 Transition Metal Complexes. Chem Rev 2015; 115:7589-728. [DOI: 10.1021/acs.chemrev.5b00074] [Citation(s) in RCA: 1065] [Impact Index Per Article: 118.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vivian Wing-Wah Yam
- Institute of Molecular Functional
Materials (Areas of Excellence Scheme, University Grants Committee
(Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Vonika Ka-Man Au
- Institute of Molecular Functional
Materials (Areas of Excellence Scheme, University Grants Committee
(Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Sammual Yu-Lut Leung
- Institute of Molecular Functional
Materials (Areas of Excellence Scheme, University Grants Committee
(Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
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33
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Shelar DP, Li TT, Chen Y, Fu WF. Platinum(II) Schiff Base Complexes as Photocatalysts for Visible-Light-Induced Cross-Dehydrogenative Coupling Reactions. Chempluschem 2015; 80:1541-1546. [DOI: 10.1002/cplu.201500157] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Revised: 06/03/2015] [Indexed: 12/24/2022]
Affiliation(s)
- Deepak Prakash Shelar
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials; Technical Institute of Physics and Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Ting-Ting Li
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials; Technical Institute of Physics and Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Yong Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials; Technical Institute of Physics and Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Wen-Fu Fu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials; Technical Institute of Physics and Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
- College of Chemistry and Chemical Engineering; Yunnan Normal University; Kunming 650092 P. R. China
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34
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Chen Y, Che CM, Lu W. Phosphorescent organoplatinum(II) complexes with a lipophilic anion: supramolecular soft nanomaterials through ionic self-assembly and metallophilicity. Chem Commun (Camb) 2015; 51:5371-4. [PMID: 25429375 DOI: 10.1039/c4cc08569h] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Upon switching the counter-ion to a highly lipophilic anion, a series of phosphorescent cationic organoplatinum(II) salts are rendered soluble in non-polar solvents and can further self-organize into lamellar nanostructures, breath-figure arrays and smectic mesophases.
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Affiliation(s)
- Yong Chen
- State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China.
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35
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Cheng G, So GKM, To WP, Chen Y, Kwok CC, Ma C, Guan X, Chang X, Kwok WM, Che CM. Luminescent zinc(ii) and copper(i) complexes for high-performance solution-processed monochromic and white organic light-emitting devices. Chem Sci 2015; 6:4623-4635. [PMID: 29142704 PMCID: PMC5667404 DOI: 10.1039/c4sc03161j] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 05/15/2015] [Indexed: 12/21/2022] Open
Abstract
The synthesis and spectroscopic properties of luminescent tetranuclear zinc(ii) complexes of substituted 7-azaindoles and a series of luminescent copper(i) complexes containing 7,8-bis(diphenylphosphino)-7,8-dicarba-nido-undecaborate ligand are described. These complexes are stable towards air and moisture. Thin film samples of the luminescent copper(i) complexes in 2,6-dicarbazolo-1,5-pyridine and zinc(ii) complexes in poly(methyl methacrylate) showed emission quantum yields of up to 0.60 (for Cu-3) and 0.96 (for Zn-1), respectively. Their photophysical properties were examined by ultrafast time-resolved emission spectroscopy, temperature dependent emission lifetime measurements and density functional theory calculations. Monochromic blue and orange solution-processed OLEDs with these Zn(ii) and Cu(i) complexes as light-emitting dopants have been fabricated, respectively. Maximum external quantum efficiency (EQE) of 5.55% and Commission Internationale de l'Eclairage (CIE) coordinates of (0.16, 0.19) were accomplished with the optimized Zn-1-OLED while these values were, respectively 15.64% and (0.48, 0.51) for the optimized Cu-3-OLED. Solution-processed white OLEDs having maximum EQE of 6.88%, CIE coordinates of (0.42, 0.44), and colour rendering index of 81 were fabricated by using these luminescent Zn(ii) and Cu(i) complexes as blue and orange light-emitting dopant materials, respectively.
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Affiliation(s)
- Gang Cheng
- State Key Laboratory of Synthetic Chemistry , HKU-CAS Joint Laboratory on New Materials, and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , China . .,HKU Shenzhen Institute of Research and Innovation , Shenzhen 518053 , China.,State Key Laboratory on Integrated Optoelectronics , College of Electronic Science and Engineering , Jilin University , Changchun 130012 , China
| | - Gary Kwok-Ming So
- State Key Laboratory of Synthetic Chemistry , HKU-CAS Joint Laboratory on New Materials, and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , China .
| | - Wai-Pong To
- State Key Laboratory of Synthetic Chemistry , HKU-CAS Joint Laboratory on New Materials, and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , China .
| | - Yong Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials , Technical Institute of Physics and Chemistry , Chinese Academy of Sciences , Beijing 100190 , China
| | - Chi-Chung Kwok
- State Key Laboratory of Synthetic Chemistry , HKU-CAS Joint Laboratory on New Materials, and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , China . .,HKU Shenzhen Institute of Research and Innovation , Shenzhen 518053 , China
| | - Chensheng Ma
- State Key Laboratory of Synthetic Chemistry , HKU-CAS Joint Laboratory on New Materials, and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , China . .,School of Chemistry and Chemical Engineering , Shenzhen University , Shenzhen 518060 , China
| | - Xiangguo Guan
- State Key Laboratory of Synthetic Chemistry , HKU-CAS Joint Laboratory on New Materials, and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , China .
| | - Xiaoyong Chang
- State Key Laboratory of Synthetic Chemistry , HKU-CAS Joint Laboratory on New Materials, and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , China .
| | - Wai-Ming Kwok
- Department of Applied Biology and Chemical Technology , The Hong Kong Polytechnic University , Hung Hom, Kowloon , Hong Kong SAR , China
| | - Chi-Ming Che
- State Key Laboratory of Synthetic Chemistry , HKU-CAS Joint Laboratory on New Materials, and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong SAR , China . .,HKU Shenzhen Institute of Research and Innovation , Shenzhen 518053 , China
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36
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Tsai JLL, Zou T, Liu J, Chen T, Chan AOY, Yang C, Lok CN, Che CM. Luminescent platinum(ii) complexes with self-assembly and anti-cancer properties: hydrogel, pH dependent emission color and sustained-release properties under physiological conditions. Chem Sci 2015; 6:3823-3830. [PMID: 29218152 PMCID: PMC5707448 DOI: 10.1039/c4sc03635b] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 04/13/2015] [Indexed: 12/28/2022] Open
Abstract
Luminescent platinum(ii) complexes show anti-cancer and pH-dependent self-assembly and sustained-release properties under physiological conditions.
Supramolecular interactions are of paramount importance in biology and chemistry, and can be used to develop new vehicles for drug delivery. Recently, there is a surge of interest on self-assembled functional supramolecular structures driven by intermolecular metal–metal interactions in cellular conditions. Herein we report a series of luminescent Pt(ii) complexes [Pt(C^N^Npyr)(C
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>
NR)]+ [HC^N^Npyr = 2-phenyl-6-(1H-pyrazol-3-yl)-pyridine)] containing pincer type ligands having pyrazole moieties. These Pt(ii) complexes exert potent cytotoxicity to a panel of cancer cell lines including primary bladder cancer cells and display strong phosphorescence that is highly sensitive to the local environment. The self-assembly of these complexes is significantly affected by pH of the solution medium. Based on TEM, SEM, ESI-MS, absorption and emission spectroscopy, and fluorescence microscopy together with cell based assays, [Pt(C^N^Npyr)(C
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>
NR)]+ complexes were observed to self-assemble into orange phosphorescent polymeric aggregates driven by intermolecular Pt(ii)–Pt(ii) and ligand–ligand interactions in a low-pH physiological medium. Importantly, the intracellular assembly and dis-assembly of [Pt(C^N^Npyr)(C
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>
NR)]+ are accompanied by change of emission color from orange to green. These [Pt(C^N^Npyr)(C
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>
NR)]+ complexes accumulated in the lysosomes of cancer cells, increased the lysosomal membrane permeability and induced cell death. One of these platinum(ii) complexes formed hydrogels which displayed pH-responsive and sustained release properties, leading to low-pH-stimulated and time-dependent cytotoxicity towards cancer cells. These hydrogels can function as vehicles to deliver anti-cancer agent cargo, such as the bioactive natural products studied in this work.
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Affiliation(s)
- Johnson Lui-Lui Tsai
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , Chemical Biology Centre and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China .
| | - Taotao Zou
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , Chemical Biology Centre and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China . .,HKU Shenzhen Institute of Research and Innovation , Shenzhen 518053 , China
| | - Jia Liu
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , Chemical Biology Centre and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China .
| | - Tianfeng Chen
- Department of Chemistry , Jinan University , Guangzhou 510632 , China
| | - Anna On-Yee Chan
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , Chemical Biology Centre and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China .
| | - Chen Yang
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , Chemical Biology Centre and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China . .,HKU Shenzhen Institute of Research and Innovation , Shenzhen 518053 , China
| | - Chun-Nam Lok
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , Chemical Biology Centre and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China .
| | - Chi-Ming Che
- State Key Laboratory of Synthetic Chemistry , Institute of Molecular Functional Materials , Chemical Biology Centre and Department of Chemistry , The University of Hong Kong , Pokfulam Road , Hong Kong , China . .,HKU Shenzhen Institute of Research and Innovation , Shenzhen 518053 , China
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37
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Turning-On of Coumarin Phosphorescence in Acetylacetonato Platinum Complexes of Cyclometalated Pyridyl-Substituted Coumarins. INORGANICS 2015. [DOI: 10.3390/inorganics3020055] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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38
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Shafaatian B, Heidari B. Synthesis, characterization, crystal structure, solvatochromism, fluorescence and electrochemical studies of new organometallic platinum complexes, kinetic investigation of oxidative addition reaction. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.12.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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39
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Choi WJ, Choi S, Ohkubo K, Fukuzumi S, Cho EJ, You Y. Mechanisms and applications of cyclometalated Pt(ii) complexes in photoredox catalytic trifluoromethylation. Chem Sci 2015; 6:1454-1464. [PMID: 29560234 PMCID: PMC5811153 DOI: 10.1039/c4sc02537g] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 11/21/2014] [Indexed: 11/24/2022] Open
Abstract
The incorporation of a trifluoromethyl group into an existing scaffold can provide an effective strategy for designing new drugs and agrochemicals. Among the numerous approaches to trifluoromethylation, radical trifluoromethylation mediated by visible light-driven photoredox catalysis has gathered significant interest as it offers unique opportunities for circumventing the drawbacks encountered in conventional methods. A limited understanding of the mechanism and molecular parameters that control the catalytic actions has hampered the full utilization of photoredox catalysis reactions. To address this challenge, we evaluated and investigated the photoredox catalytic trifluoromethylation reaction using a series of cyclometalated Pt(ii) complexes with systematically varied ligand structures. The Pt(ii) complexes were capable of catalyzing the trifluoromethylation of non-prefunctionalized alkenes and heteroarenes in the presence of CF3I under visible light irradiation. The high excited-state redox potentials of the complexes permitted oxidative quenching during the cycle, whereas reductive quenching was forbidden. Spectroscopic measurements, including time-resolved photoluminescence and laser flash photolysis, were performed to identify the catalytic intermediates and directly monitor their conversions. The mechanistic studies provide compelling evidence that the catalytic cycle selects the oxidative quenching pathway. We also found that electron transfer during each step of the cycle strictly adhered to the Marcus normal region behaviors. The results are fully supported by additional experiments, including photoinduced ESR spectroscopy, spectroelectrochemical measurements, and quantum chemical calculations based on time-dependent density functional theory. Finally, quantum yields exceeding 100% strongly suggest that radical propagation significantly contributes to the catalytic trifluoromethylation reaction. These findings establish molecular strategies for designing trifluoromethyl sources and catalysts in an effort to enhance catalysis performance.
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Affiliation(s)
- Won Joon Choi
- Department of Advanced Materials Engineering for Information and Electronics , Kyung Hee University , Yongin , Gyeonggi-do 446-701 , Korea .
| | - Sungkyu Choi
- Department of Applied Chemistry & Department of Bionanotechnology , Hanyang University , Ansan , Gyeonggi-do 426-791 , Korea .
| | - Kei Ohkubo
- Department of Material and Life Science , Graduate School of Engineering , Osaka University , ALCA , Japan Science and Technology Agency (JST) , Suita , Osaka 565-0871 , Japan .
| | - Shunichi Fukuzumi
- Department of Material and Life Science , Graduate School of Engineering , Osaka University , ALCA , Japan Science and Technology Agency (JST) , Suita , Osaka 565-0871 , Japan .
| | - Eun Jin Cho
- Department of Applied Chemistry & Department of Bionanotechnology , Hanyang University , Ansan , Gyeonggi-do 426-791 , Korea .
| | - Youngmin You
- Department of Advanced Materials Engineering for Information and Electronics , Kyung Hee University , Yongin , Gyeonggi-do 446-701 , Korea .
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40
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Sanning J, Ewen PR, Stegemann L, Schmidt J, Daniliuc CG, Koch T, Doltsinis NL, Wegner D, Strassert CA. Rastertunnelspektroskopisch gesteuertes Design maßgeschneiderter tiefblauer Triplettemitter. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201407439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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41
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Chow PK, Cheng G, Tong GSM, To WP, Kwong WL, Low KH, Kwok CC, Ma C, Che CM. Luminescent pincer platinum(II) complexes with emission quantum yields up to almost unity: photophysics, photoreductive C-C bond formation, and materials applications. Angew Chem Int Ed Engl 2015; 54:2084-9. [PMID: 25581564 DOI: 10.1002/anie.201408940] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Indexed: 12/21/2022]
Abstract
Luminescent pincer-type Pt(II) complexes supported by C-deprotonated π-extended tridentate RC^N^NR' ligands and pentafluorophenylacetylide ligands show emission quantum yields up to almost unity. Femtosecond time-resolved fluorescence measurements and time-dependent DFT calculations together reveal the dependence of excited-state structural distortions of [Pt(RC^N^NR')(CC-C6 F5 )] on the positional isomers of the tridentate ligand. Pt complexes [Pt(R-C^N^NR')(CC-Ar)] are efficient photocatalysts for visible-light-induced reductive CC bond formation. The [Pt(R-C^N^NR')(CC-C6 F5 )] complexes perform strongly as phosphorescent dopants for green- and red-emitting organic light-emitting diodes (OLEDs) with external quantum efficiency values over 22.1 %. These complexes are also applied in two-photon cellular imaging when incorporated into mesoporous silica nanoparticles (MSNs).
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Affiliation(s)
- Pui-Keong Chow
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong (P.R. China)
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42
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Chow PK, Cheng G, Tong GSM, To WP, Kwong WL, Low KH, Kwok CC, Ma C, Che CM. Luminescent Pincer Platinum(II) Complexes with Emission Quantum Yields up to Almost Unity: Photophysics, Photoreductive CC Bond Formation, and Materials Applications. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201408940] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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43
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Steel HL, Allinson SL, Andre J, Coogan MP, Platts JA. Platinum trimethyl bipyridyl thiolates – new, tunable, red- to near IR emitting luminophores for bioimaging applications. Chem Commun (Camb) 2015; 51:11441-4. [DOI: 10.1039/c5cc04003e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
[PtMe3(S-C6H4-4-CO2Me)(bpy)]n+ exemplifies a new class of luminophores, absorbing in the visible and emitting into the NIR, with good cell uptake making it suitable for fluorescence microscopy imaging.
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Affiliation(s)
- Harriet L. Steel
- Division of Biomedical and Life Sciences
- Faculty of Health and Medicine
- Furness Building
- Lancaster University
- Lancaster
| | - Sarah L. Allinson
- Division of Biomedical and Life Sciences
- Faculty of Health and Medicine
- Furness Building
- Lancaster University
- Lancaster
| | - Jane Andre
- Division of Biomedical and Life Sciences
- Faculty of Health and Medicine
- Furness Building
- Lancaster University
- Lancaster
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44
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Geist F, Jackel A, Winter RF. Dual ligand-based fluorescence and phosphorescence emission at room temperature from platinum thioxanthonyl complexes. Dalton Trans 2015; 44:3974-87. [DOI: 10.1039/c4dt02410a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Platinum complexes with σ-bonded thioxanthonyl (Tx) ligands exhibit, on irradiation into the Tx π→π* band, dual Tx-based fluorescence and phosphorescence emission with phosphorescence quantum yields of up to 19% in fluid solution at room temperature.
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Affiliation(s)
- Fabian Geist
- Fachbereich Chemie der Universität Konstanz
- D-78457 Konstanz
- Germany
| | - Andrej Jackel
- Fachbereich Chemie der Universität Konstanz
- D-78457 Konstanz
- Germany
| | - Rainer F. Winter
- Fachbereich Chemie der Universität Konstanz
- D-78457 Konstanz
- Germany
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45
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Sanning J, Ewen PR, Stegemann L, Schmidt J, Daniliuc CG, Koch T, Doltsinis NL, Wegner D, Strassert CA. Scanning-Tunneling-Spectroscopy-Directed Design of Tailored Deep-Blue Emitters. Angew Chem Int Ed Engl 2014; 54:786-91. [DOI: 10.1002/anie.201407439] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Indexed: 01/16/2023]
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46
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Tanaka T, Nouchi R, Nakao Y, Arikawa Y, Umakoshi K. Highly luminescent imidoylamidinato platinum(ii) complexes formed by the coupling of 1H-pyrazole-1-carboxamidine with nitriles used as reaction solvents. RSC Adv 2014. [DOI: 10.1039/c4ra11744a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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47
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Chu WK, Yiu SM, Ko CC. Neutral Luminescent Bis(bipyridyl) Osmium(II) Complexes with Improved Phosphorescent Properties. Organometallics 2014. [DOI: 10.1021/om500630c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Wing-Kin Chu
- Department of Biology and
Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, People’s Republic of China
| | - Shek-Man Yiu
- Department of Biology and
Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, People’s Republic of China
| | - Chi-Chiu Ko
- Department of Biology and
Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, People’s Republic of China
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48
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Xing LB, Wang XJ, Gao XW, Chen B, Tung CH, Wu LZ. Self-assembled vesicles from amphiphilic platinum(II) terpyridyl complex in water. Supramol Chem 2014. [DOI: 10.1080/10610278.2014.975706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Ling-Bao Xing
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, P.R. China
- School of Chemical Engineering, Shandong University of Technology, Zibo 255049, P.R. China
| | - Xiao-Jun Wang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Xue-Wang Gao
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry and University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, P.R. China
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49
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Xiao Q, Zheng J, Li M, Zhan SZ, Wang JH, Li D. Mechanically Triggered Fluorescence/Phosphorescence Switching in the Excimers of Planar Trinuclear Copper(I) Pyrazolate Complexes. Inorg Chem 2014; 53:11604-15. [DOI: 10.1021/ic5016687] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Qiong Xiao
- Department of Chemistry
and Key Laboratory for Preparation and Application of Ordered Structural
Materials of Guangdong Province, Shantou University, Guangdong 515063, People’s Republic of China
| | - Ji Zheng
- Department of Chemistry
and Key Laboratory for Preparation and Application of Ordered Structural
Materials of Guangdong Province, Shantou University, Guangdong 515063, People’s Republic of China
| | - Mian Li
- Department of Chemistry
and Key Laboratory for Preparation and Application of Ordered Structural
Materials of Guangdong Province, Shantou University, Guangdong 515063, People’s Republic of China
| | - Shun-Ze Zhan
- Department of Chemistry
and Key Laboratory for Preparation and Application of Ordered Structural
Materials of Guangdong Province, Shantou University, Guangdong 515063, People’s Republic of China
| | - Jun-Hao Wang
- Department of Chemistry
and Key Laboratory for Preparation and Application of Ordered Structural
Materials of Guangdong Province, Shantou University, Guangdong 515063, People’s Republic of China
| | - Dan Li
- Department of Chemistry
and Key Laboratory for Preparation and Application of Ordered Structural
Materials of Guangdong Province, Shantou University, Guangdong 515063, People’s Republic of China
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50
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Borré E, Dahm G, Aliprandi A, Mauro M, Dagorne S, Bellemin-Laponnaz S. Tridentate Complexes of Group 10 Bearing Bis-Aryloxide N-Heterocyclic Carbene Ligands: Synthesis, Structural, Spectroscopic, and Computational Characterization. Organometallics 2014. [DOI: 10.1021/om5003446] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Etienne Borré
- Institut
de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg CNRS UMR 7504, 23 rue du Loess, BP 43, F-67034 Strasbourg Cedex
2, France
| | - Georges Dahm
- Institut
de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg CNRS UMR 7504, 23 rue du Loess, BP 43, F-67034 Strasbourg Cedex
2, France
| | - Alessandro Aliprandi
- Laboratoire
de Chimie et des Biomatériaux Supramoléculaires, Institut
de Science et d’Ingénierie Supramoléculaires
(ISIS), Université de Strasbourg UMR 7006, 8 allée
Gaspard Monge, F-67083 Strasbourg, France
| | - Matteo Mauro
- Laboratoire
de Chimie et des Biomatériaux Supramoléculaires, Institut
de Science et d’Ingénierie Supramoléculaires
(ISIS), Université de Strasbourg UMR 7006, 8 allée
Gaspard Monge, F-67083 Strasbourg, France
- University of Strasbourg Institute for Advanced Study (USIAS), 5 allée du Général Rouvillois, 67083 Strasbourg, France
| | - Samuel Dagorne
- Institut
de Chimie de Strasbourg, CNRS-Université de Strasbourg UMR 7177, 1 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Stéphane Bellemin-Laponnaz
- Institut
de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg CNRS UMR 7504, 23 rue du Loess, BP 43, F-67034 Strasbourg Cedex
2, France
- University of Strasbourg Institute for Advanced Study (USIAS), 5 allée du Général Rouvillois, 67083 Strasbourg, France
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