1
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Feng X, Yang J, Miao J, Zhong C, Yin X, Li N, Wu C, Zhang Q, Chen Y, Li K, Yang C. Au⋅⋅⋅H−C Interactions Support a Robust Thermally Activated Delayed Fluorescence (TADF) Gold(I) Complex for OLEDs with Little Efficiency Roll‐Off and Good Stability. Angew Chem Int Ed Engl 2022; 61:e202209451. [DOI: 10.1002/anie.202209451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Xingyu Feng
- Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University Shenzhen 518055 P. R. China
| | - Jian‐Gong Yang
- Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University Shenzhen 518055 P. R. China
- College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 P. R. China
| | - Jingsheng Miao
- Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University Shenzhen 518055 P. R. China
| | - Cheng Zhong
- Department of Chemistry Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Wuhan University Wuhan 430072 P. R. China
| | - Xiaojun Yin
- Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University Shenzhen 518055 P. R. China
| | - Nengquan Li
- Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University Shenzhen 518055 P. R. China
| | - Chao Wu
- Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University Shenzhen 518055 P. R. China
| | - Qizheng Zhang
- Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University Shenzhen 518055 P. R. China
| | - Yong Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China
| | - Kai Li
- Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University Shenzhen 518055 P. R. China
| | - Chuluo Yang
- Shenzhen Key Laboratory of New Information Display and Storage Materials College of Materials Science and Engineering Shenzhen University Shenzhen 518055 P. R. China
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2
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Feng X, Yang JG, Miao J, Zhong C, Yin X, Li N, Wu C, Zhang Q, Chen Y, Li K, Yang C. Au···H–C Interactions‐supported Robust TADF Gold(I) Complex for OLEDs with Extremely Small Efficiency Roll‐off and Good Stability. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202209451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xingyu Feng
- Shenzhen University College of Materials Science and Engineering CHINA
| | - Jian-Gong Yang
- Shenzhen University College of Materials Science and Engineering CHINA
| | - Jingsheng Miao
- Shenzhen University College of Materials Science and Engineering CHINA
| | - Cheng Zhong
- Wuhan University Department of Chemistry CHINA
| | - Xiaojun Yin
- Shenzhen University College of Materials Science and Engineering CHINA
| | - Nengquan Li
- Shenzhen University College of Materials Science and Engineering CHINA
| | - Chao Wu
- Shenzhen University College of Materials Science and Engineering CHINA
| | - Qizheng Zhang
- Shenzhen University College of Materials Science and Engineering CHINA
| | - Yong Chen
- Technical Institute of Physics and Chemistry CAS: Technical Institute of Physics and Chemistry Key Laboratory of Photochemical Conversion and Optoelectronic Materials Beijing CHINA
| | - Kai Li
- Shenzhen University College of Materials Science and Engineering Xueyuan Blvd. 1066 518055 CHINA
| | - Chuluo Yang
- Shenzhen University College of Materials Science and Engineering Xueyuan Avenue 518000 Shenzhen CHINA
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3
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Lo K, Tong GSM, Cheng G, Low K, Che C. Dinuclear Pt
II
Complexes with Strong Blue Phosphorescence for Operationally Stable Organic Light‐Emitting Diodes with EQE up to 23 % at 1000 cd m
−2. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Kar‐Wai Lo
- 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
| | - Glenna So Ming Tong
- 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
- Hong Kong Quantum AI Lab Limited 17 Science Park West Avenue Pak Shek Kok, Hong Kong P. R. China
| | - 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 P. R. China
- Hong Kong Quantum AI Lab Limited 17 Science Park West Avenue Pak Shek Kok, Hong Kong P. R. China
- HKU Shenzhen Institute of Research and Innovation Shenzhen 518053 P. R. China
| | - Kam‐Hung Low
- 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
| | - 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 P. R. China
- Hong Kong Quantum AI Lab Limited 17 Science Park West Avenue Pak Shek Kok, Hong Kong P. R. China
- HKU Shenzhen Institute of Research and Innovation Shenzhen 518053 P. R. China
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4
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Lo KW, Tong GSM, Cheng G, Low KH, Che CM. Dinuclear PtII Complexes with Strong Blue Phosphorescence for Operational Stable Organic Light-Emitting Diodes with EQE up to 23% at 1000 cd m-2. Angew Chem Int Ed Engl 2021; 61:e202115515. [PMID: 34939273 DOI: 10.1002/anie.202115515] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Indexed: 11/08/2022]
Abstract
Here we describe the synthesis and characterization of a new class of dinuclear PtII complexes with blue phosphorescence. Bulky N-heterocyclic carbene and tethered bridging ligands were employed to suppress photo-induced structural changes and to improve thermal stability of the complexes. These complexes show mixed 3IL/3MLCT blue emission (~460 nm) with emission quantum yields of up to 0.95, emission lifetimes of as low as 1.3 µs and radiative decay rate constants of up to 7.3 × 105 s-1 in 4 wt% doped PMMA films; the latter is attributed to a 1MLCT excited state having high metal character (resulting in large SOC) and a large transition dipole moment, based on DFT calculations. Phosphor-sensitized blue hyperOLEDs with Commission Internationale de L'Eclairage (CIE) coordinates of (0.13, 0.12) showed maximum EQE of 23.4% with full-width-at-half-maximum of 18 nm and LT50 > 250 h at an L0 of 1000 cd m-2.
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Affiliation(s)
- Kar-Wai Lo
- The University of Hong Kong, Chemistry, HONG KONG
| | | | - Gang Cheng
- The University of Hong Kong, Chemistry, HONG KONG
| | - Kam-Hung Low
- The University of Hong Kong, Chemistry, HONG KONG
| | - Chi-Ming Che
- The University of Hong Kong, Pokfulam Road, -, Hong Kong, HONG KONG
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5
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Stück R, Krause M, Brünink D, Buss S, Doltsinis NL, Strassert CA, Klein A. Luminescent Pd(II) Complexes with Tridentate
−
Aryl‐pyridine‐(benzo)thiazole Ligands. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202100278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- René Stück
- Universität zu Köln Mathematisch-Naturwissenschaftliche Fakultät Department für Chemie Institut für Anorganische Chemie Greinstraße 6 D-50939 Köln
| | - Maren Krause
- Universität zu Köln Mathematisch-Naturwissenschaftliche Fakultät Department für Chemie Institut für Anorganische Chemie Greinstraße 6 D-50939 Köln
| | - Dana Brünink
- Westfälische Wilhelms-Universität Münster Institut für Festkörpertheorie and Center for Multiscale Theory and Computation Wilhelm-Klemm-Straße 10 D-48149 Münster Germany
| | - Stefan Buss
- Westfälische Wilhelms-Universität Münster Institut für Anorganische und Analytische Chemie, CiMIC, CeNTech Heisenbergstraße 11 D-48149 Münster Germany
| | - Nikos L. Doltsinis
- Westfälische Wilhelms-Universität Münster Institut für Festkörpertheorie and Center for Multiscale Theory and Computation Wilhelm-Klemm-Straße 10 D-48149 Münster Germany
| | - Cristian A. Strassert
- Westfälische Wilhelms-Universität Münster Institut für Anorganische und Analytische Chemie, CiMIC, CeNTech Heisenbergstraße 11 D-48149 Münster Germany
| | - Axel Klein
- Universität zu Köln Mathematisch-Naturwissenschaftliche Fakultät Department für Chemie Institut für Anorganische Chemie Greinstraße 6 D-50939 Köln
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6
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Buil ML, Esteruelas MA, López AM. Recent Advances in Synthesis of Molecular Heteroleptic Osmium and Iridium Phosphorescent Emitters. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100663] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- María L. Buil
- Departamento de Química Inorgánica Instituto de Síntesis Química y Catálisis Homogénea (ISQCH) Centro de Innovación en Química Avanzada (ORFEO-CINQA) Universidad de Zaragoza-CSIC 50009 Zaragoza Spain
| | - Miguel A. Esteruelas
- Departamento de Química Inorgánica Instituto de Síntesis Química y Catálisis Homogénea (ISQCH) Centro de Innovación en Química Avanzada (ORFEO-CINQA) Universidad de Zaragoza-CSIC 50009 Zaragoza Spain
| | - Ana M. López
- Departamento de Química Inorgánica Instituto de Síntesis Química y Catálisis Homogénea (ISQCH) Centro de Innovación en Química Avanzada (ORFEO-CINQA) Universidad de Zaragoza-CSIC 50009 Zaragoza Spain
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7
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Beucher H, Kumar S, Kumar R, Merino E, Hu WH, Stemmler G, Cuesta-Galisteo S, González JA, Bezinge L, Jagielski J, Shih CJ, Nevado C. Phosphorescent κ 3 -(N^C^C)-Gold(III) Complexes: Synthesis, Photophysics, Computational Studies and Application to Solution-Processable OLEDs. Chemistry 2020; 26:17604-17612. [PMID: 32780903 DOI: 10.1002/chem.202003571] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Indexed: 12/19/2022]
Abstract
Efficient OLED devices have been fabricated using organometallic complexes of platinum group metals. Still, the high material cost and low stability represent central challenges for their application in commercial display technologies. Based on its innate stability, gold(III) complexes are emerging as promising candidates for high-performance OLEDs. Here, a series of alkynyl-, N-heterocyclic carbene (NHC)- and aryl-gold(III) complexes stabilized by a κ3 -(N^C^C) template have been prepared and their photophysical properties have been characterized in detail. These compounds exhibit good photoluminescence quantum efficiency (ηPL ) of up to 33 %. The PL emission can be tuned from sky-blue to yellowish green colors by variations on both the ancillary ligands as well as on the pincer template. Further, solution-processable OLED devices based on some of these complexes display remarkable emissive properties (ηCE 46.6 cd.A-1 and ηext 14.0 %), thus showcasing the potential of these motifs for the low-cost fabrication of display and illumination technologies.
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Affiliation(s)
- Hélène Beucher
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
| | - Sudhir Kumar
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093, Zürich, Switzerland
| | - Roopender Kumar
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
| | - Estíbaliz Merino
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
| | - Wei-Hsu Hu
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093, Zürich, Switzerland
| | - Gerrit Stemmler
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093, Zürich, Switzerland
| | - Sergio Cuesta-Galisteo
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
| | - Jorge A González
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
| | - Léonard Bezinge
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093, Zürich, Switzerland
| | - Jakub Jagielski
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093, Zürich, Switzerland
| | - Chih-Jen Shih
- Institute for Chemical and Bioengineering, Department of Chemistry and Applied Biosciences, ETH-Zürich, 8093, Zürich, Switzerland
| | - Cristina Nevado
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057, Zürich, Switzerland
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8
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Puttock EV, Sturala J, Kistemaker JCM, Williams JAG. Platinum(II) Complexes of Tridentate ‐Coordinating Ligands Based on Imides, Amides, and Hydrazides: Synthesis and Luminescence Properties. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Emma V. Puttock
- Department of Chemistry Durham University DH1 3LE, U.K. Durham
| | - Jiri Sturala
- Department of Inorganic Chemistry University of Chemistry and Technology Prague Technicka 5 166 28 Prague 6 Czech Republic
| | - Jos C. M. Kistemaker
- Centre for Organic Photonics and Electronics The School of Chemistry and Molecular Biosciences University of Queensland 4072 Queensland Australia
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9
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Yagüe C, Echevarría I, Vaquero M, Fidalgo J, Carbayo A, Jalón FA, Lima JC, Moro AJ, Manzano BR, Espino G. Non-emissive Ru II Polypyridyl Complexes as Efficient and Selective Photosensitizers for the Photooxidation of Benzylamines. Chemistry 2020; 26:12219-12232. [PMID: 32301532 DOI: 10.1002/chem.202001460] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/16/2020] [Indexed: 11/07/2022]
Abstract
Five new RuII polypyridyl complexes bearing N-(arylsulfonyl)-8-amidoquinolate ligands and three of their biscyclometalated IrIII congeners have been prepared and employed as photocatalysts (PCs) in the photooxidation of benzylamines with O2 . In particular, the new RuII complexes do not exhibit photoluminescence, rather they harvest visible light efficiently and are very stable in solution under irradiation with blue light. Their non-emissive behavior has been related to the low electrochemical energy gaps and rationalized on the basis of theoretical calculations (DFT analysis) that predict low S0 ←T1 energy values. Moreover, the RuII complexes, despite being non-emissive, display excellent activities in the selective photocatalytic transformation of benzylamines into the corresponding imines. The presence of an electron-withdrawing group (-CF3) on the arene ring of the N-(arylsulfonyl)-8-amidoquinolate ligand improves the photocatalytic activity of the corresponding photocatalyst. Furthermore, all the experimental evidence, including transient absorption spectroscopy measurements suggest that singlet oxygen is the actual oxidant. The IrIII analogues are considerably more photosensitive and consequently less efficient photosensitizers (PSs).
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Affiliation(s)
- Cristina Yagüe
- Universidad de Burgos, Departamento de Química, Facultad de Ciencias, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Igor Echevarría
- Universidad de Burgos, Departamento de Química, Facultad de Ciencias, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Mónica Vaquero
- Universidad de Burgos, Departamento de Química, Facultad de Ciencias, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Jairo Fidalgo
- Universidad de Burgos, Departamento de Química, Facultad de Ciencias, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Arancha Carbayo
- Universidad de Burgos, Departamento de Química, Facultad de Ciencias, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
| | - Félix A Jalón
- Universidad de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, Avda. Camilo J. Cela 10, 13071, Ciudad Real, Spain
| | - João C Lima
- Universidade NOVA de Lisboa, LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, 2829-516, Caparica, Portugal
| | - Artur J Moro
- Universidade NOVA de Lisboa, LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, 2829-516, Caparica, Portugal
| | - Blanca R Manzano
- Universidad de Castilla-La Mancha, Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, Avda. Camilo J. Cela 10, 13071, Ciudad Real, Spain
| | - Gustavo Espino
- Universidad de Burgos, Departamento de Química, Facultad de Ciencias, Plaza Misael Bañuelos s/n, 09001, Burgos, Spain
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10
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Hung FF, Wu SX, To WP, Kwong WL, Guan X, Lu W, Low KH, Che CM. Palladium(II) Acetylide Complexes with Pincer-Type Ligands: Photophysical Properties, Intermolecular Interactions, and Photo-cytotoxicity. Chem Asian J 2016; 12:145-158. [DOI: 10.1002/asia.201601414] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Indexed: 12/26/2022]
Affiliation(s)
- Faan-Fung Hung
- State Key Laboratory of Synthetic Chemistry; Institute of Molecular Functional Materials; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong SAR China
| | - Shui-Xing Wu
- School of Chemistry and Chemical Engineering; Hainan Normal University; Haikou 571158 China
| | - Wai-Pong To
- State Key Laboratory of Synthetic Chemistry; Institute of Molecular Functional Materials; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong SAR China
| | - Wai-Lun Kwong
- State Key Laboratory of Synthetic Chemistry; Institute of Molecular Functional Materials; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong SAR China
| | - Xiangguo Guan
- State Key Laboratory of Synthetic Chemistry; Institute of Molecular Functional Materials; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong SAR China
| | - Wei Lu
- State Key Laboratory of Synthetic Chemistry; Institute of Molecular Functional Materials; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong SAR China
| | - Kam-Hung Low
- State Key Laboratory of Synthetic Chemistry; Institute of Molecular Functional Materials; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong SAR China
| | - Chi-Ming Che
- State Key Laboratory of Synthetic Chemistry; Institute of Molecular Functional Materials; Department of Chemistry; The University of Hong Kong; Pokfulam Road Hong Kong SAR China
- HKU Shenzhen Institute of Research and Innovation; Shenzhen Guangdong 518053 China
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11
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Yeung KT, To WP, Sun C, Cheng G, Ma C, Tong GSM, Yang C, Che CM. Luminescent Tungsten(VI) Complexes: Photophysics and Applicability to Organic Light-Emitting Diodes and Photocatalysis. Angew Chem Int Ed Engl 2016; 56:133-137. [PMID: 27918133 DOI: 10.1002/anie.201608240] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Indexed: 11/06/2022]
Abstract
The synthesis, excited-state dynamics, and applications of two series of air-stable luminescent tungsten(VI) complexes are described. These tungsten(VI) complexes show phosphorescence in the solid state and in solutions with emission quantum yields up to 22 % in thin film (5 % in mCP) at room temperature. Complex 2 c, containing a 5,7-diphenyl-8-hydroxyquinolinate ligand, displays prompt fluorescence (blue-green) and phosphorescence (red) of comparable intensity, which could be used for ratiometric luminescent sensing. Solution-processed organic light-emitting diodes (OLEDs) based on 1 d showed a stable yellow emission with an external quantum efficiency (EQE) and luminance up to 4.79 % and 1400 cd m-2 respectively. These tungsten(VI) complexes were also applied in light-induced aerobic oxidation reactions.
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Affiliation(s)
- Kwan-Ting Yeung
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Wai-Pong To
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Chenyue Sun
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Gang Cheng
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.,HKU Shenzhen Institute of Research and Innovation, Shenzhen, Guangdong, 518053, China
| | - Chensheng Ma
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, 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
| | - Glenna So Ming Tong
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Chen Yang
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Chi-Ming Che
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China.,HKU Shenzhen Institute of Research and Innovation, Shenzhen, Guangdong, 518053, China
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12
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Yeung K, To W, Sun C, Cheng G, Ma C, Tong GSM, Yang C, Che C. Luminescent Tungsten(VI) Complexes: Photophysics and Applicability to Organic Light‐Emitting Diodes and Photocatalysis. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608240] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Kwan‐Ting Yeung
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong SAR China
| | - Wai‐Pong To
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong SAR China
| | - Chenyue Sun
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong SAR China
| | - Gang Cheng
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong SAR China
- HKU Shenzhen Institute of Research and Innovation Shenzhen, Guangdong 518053 China
| | - Chensheng Ma
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials 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
| | - Glenna So Ming Tong
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong SAR China
| | - Chen Yang
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong SAR China
| | - Chi‐Ming Che
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials Department of Chemistry The University of Hong Kong Pokfulam Road Hong Kong SAR China
- HKU Shenzhen Institute of Research and Innovation Shenzhen, Guangdong 518053 China
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13
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Ushakov DB, Plutschack MB, Gilmore K, Seeberger PH. Factors influencing the regioselectivity of the oxidation of asymmetric secondary amines with singlet oxygen. Chemistry 2015; 21:6528-34. [PMID: 25754337 DOI: 10.1002/chem.201500121] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Indexed: 11/07/2022]
Abstract
Aerobic amine oxidation is an attractive and elegant process for the α functionalization of amines. However, there are still several mechanistic uncertainties, particularly the factors governing the regioselectivity of the oxidation of asymmetric secondary amines and the oxidation rates of mixed primary amines. Herein, it is reported that singlet-oxygen-mediated oxidation of 1° and 2° amines is sensitive to the strength of the α-C-H bond and steric factors. Estimation of the relative bond dissociation energy by natural bond order analysis or by means of one-bond C-H coupling constants allowed the regioselectivity of secondary amine oxidations to be explained and predicted. In addition, the findings were utilized to synthesize highly regioselective substrates and perform selective amine cross-couplings to produce imines.
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Affiliation(s)
- Dmitry B Ushakov
- Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam (Germany)
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14
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Juliá F, Aullón G, Bautista D, González-Herrero P. Exploring excited-state tunability in luminescent tris-cyclometalated platinum(IV) complexes: synthesis of heteroleptic derivatives and computational calculations. Chemistry 2014; 20:17346-59. [PMID: 25353375 DOI: 10.1002/chem.201404583] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Indexed: 11/11/2022]
Abstract
The synthesis, structure, electrochemistry, and photophysical properties of a series of heteroleptic tris- cyclometalated Pt(IV) complexes are reported. The complexes mer-[Pt(C^N)2 (C'^N')]OTf, with C^N=C-deprotonated 2-(2,4-difluorophenyl)pyridine (dfppy) or 2-phenylpyridine (ppy), and C'^N'=C-deprotonated 2-(2-thienyl)pyridine (thpy) or 1-phenylisoquinoline (piq), were obtained by reacting bis- cyclometalated precursors [Pt(C^N)2 Cl2] with AgOTf (2 equiv) and an excess of the N'^C'H pro-ligand. The complex mer-[Pt(dfppy)2 (ppy)]OTf was obtained analogously and photoisomerized to its fac counterpart. The new complexes display long-lived luminescence at room temperature in the blue to orange color range. The emitting states involve electronic transitions almost exclusively localized on the ligand with the lowest π-π* energy gap and have very little metal character. DFT and time-dependent DFT (TD-DFT) calculations on mer-[Pt(ppy)2 (C'^N')](+) (C'^N'=thpy, piq) and mer/fac-[Pt(ppy)3](+) support this assignment and provide a basis for the understanding of the luminescence of tris-cyclometalated Pt(IV) complexes. Excited states of LMCT character may become thermally accessible from the emitting state in the mer isomers containing dfppy or ppy as chromophoric ligands, leading to strong nonradiative deactivation. This effect does not operate in the fac isomers or the mer complexes containing thpy or piq, for which nonradiative deactivation originates mainly from vibrational coupling to the ground state.
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Affiliation(s)
- Fabio Juliá
- Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Apdo. 4021, 30071 Murcia (Spain), Fax: (+34) 868-884148
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