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Zhan F, Lin GL, Zhang TS, Xu K, Yang YF, Li G, She Y. Pt-S Bond-Enabled Temperature-Dependent Phosphorescence in S-Heteroaryl Tetradentate Pt(S^C^N^O) Complexes. Inorg Chem 2024; 63:8822-8831. [PMID: 38696545 DOI: 10.1021/acs.inorgchem.4c00601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2024]
Abstract
This study presents the rare examples of S-heteroaryl tetradentate Pt(S^C^N^O) luminescent complexes (PtSZ and PtSZtBu) containing a Pt-S bond. The presence of the Pt-S bond allows the novel Pt(S^C^N^O) complexes to exhibit temperature-dependent phosphorescent emission behavior. The PtSZtBu exhibits dual-emission phenomena and biexponential transient decay spectra above 250 K, indicating the presence of two minimal excited states in the potential energy surface (PES) of the T1 state. Through complementary experimental and computational studies, we have identified changes in orbital composition between Pt(dxy)-S(px) and Pt(dyz)-S(pz) in excited states with increasing temperature. This results in two energy minima, enabling the excited states to decay selectively and radiatively at different temperatures. Consequently, this leads to remarkable steady-state and transient emission spectra changes. Our work not only provides valuable insights for the development of novel Pt-S bond-based tetradentate Pt(II) complexes but also enhances our understanding of the distinctive properties governed by the Pt-S bond.
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Affiliation(s)
- Feng Zhan
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, PR China
| | - Guo-Liang Lin
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, PR China
| | - Teng-Shuo Zhang
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, PR China
| | - Kewei Xu
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, PR China
| | - Yun-Fang Yang
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, PR China
| | - Guijie Li
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, PR China
| | - Yuanbin She
- College of Chemical Engineering, State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, PR China
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Jayabharathi J, Thanikachalam V, Thilagavathy S. Phosphorescent organic light-emitting devices: Iridium based emitter materials – An overview. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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3
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Tatarin SV, Smirnov DE, Taydakov IV, Metlin MT, Emets VV, Bezzubov SI. Tailoring the π-system of benzimidazole ligands towards stable light-harvesting cyclometalated iridium(III) complexes. Dalton Trans 2023; 52:6435-6450. [PMID: 37092600 DOI: 10.1039/d3dt00200d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
The synthesis, structure, optical and redox properties as well as photovoltaic studies of iridium(III) complexes with cyclometalated 2-arylbenzimidazoles decorated with various polyaromatic fragments and an ancillary aromatic β-diketone are reported. Despite the strong preference of the iridium(III) ion to form bis- or tris-cyclometalated complexes in which the metal participates in five-membered metallacycles, the cyclometalation of the benzimidazole ligands containing rigid π-extended systems yields dimeric complexes containing strained five- or six-membered metallacycles and allows for generating an extremely rare monocyclometalated complex. X-ray crystallography shows that the steric strain observed in the dimers is retained in heteroleptic diketonate complexes which is also corroborated by gas-phase DFT calculations. While emission maxima and redox potentials of the heteroleptic complexes exhibit just a moderate variation upon the change of the cyclometalated ligands, the extension of the π-system of the benzimidazole ligands give the complexes remarkable light absorption in the visible spectral range, which meets the requirements for application in dye-sensitized solar cells. At the titania photoanodes, these iridium dyes retain their optical properties and exhibit power conversion efficiencies under standard AM 1.5 G conditions comparable to those of other iridium-based sensitizers. These results demonstrate that the size and position of the π-extended fragment in cyclometalated ligands can modulate not only the electronic structure of the corresponding iridium(III) complexes, but also affect their composition, structure and reactivity that may find implications in future design of emerging iridium dyes, emitters and catalysts.
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Affiliation(s)
- Sergei V Tatarin
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow 119991, Russia.
| | - Daniil E Smirnov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow 119991, Russia.
| | - Ilya V Taydakov
- P.N. Lebedev Physical Institute, Russian Academy of Sciences, 53 Leninsky Prospect, Moscow 119991, Russia
| | - Mikhail T Metlin
- P.N. Lebedev Physical Institute, Russian Academy of Sciences, 53 Leninsky Prospect, Moscow 119991, Russia
- Bauman Moscow State Technical University, 2-ya Baumanskaya Str. 5/1, 105005, Moscow, Russia
| | - Victor V Emets
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow 119071, Russia
| | - Stanislav I Bezzubov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow 119991, Russia.
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Bevernaegie R, Wehlin SAM, Elias B, Troian‐Gautier L. A Roadmap Towards Visible Light Mediated Electron Transfer Chemistry with Iridium(III) Complexes. CHEMPHOTOCHEM 2021. [DOI: 10.1002/cptc.202000255] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Robin Bevernaegie
- Laboratoire de Chimie Organique CP160/06 Université libre de Bruxelles 50 avenue F. R. Roosevelt 1050 Brussels Belgium
- Institut de la Matière Condensée et des Nanosciences (IMCN) Molecular Chemistry, Materials and Catalysis (MOST) Université catholique de Louvain (UCLouvain) Place Louis Pasteur 1 box L4.01.02 1348 Louvain-la-Neuve Belgium
| | - Sara A. M. Wehlin
- Laboratoire de Chimie Organique CP160/06 Université libre de Bruxelles 50 avenue F. R. Roosevelt 1050 Brussels Belgium
| | - Benjamin Elias
- Institut de la Matière Condensée et des Nanosciences (IMCN) Molecular Chemistry, Materials and Catalysis (MOST) Université catholique de Louvain (UCLouvain) Place Louis Pasteur 1 box L4.01.02 1348 Louvain-la-Neuve Belgium
| | - Ludovic Troian‐Gautier
- Laboratoire de Chimie Organique CP160/06 Université libre de Bruxelles 50 avenue F. R. Roosevelt 1050 Brussels Belgium
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Inoue R, Morisaki Y. Efficient Stereoselective Synthesis and Optical Properties of Heteroleptic Square‐Planar Platinum(II) Complexes with Bidentate Iminopyrrolyl Ligands. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000689] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ryo Inoue
- Department of Applied Chemistry for Environment School of Science and Technology Kwansei Gakuin University 2‐1 Gakuen 669‐1337 Sanda Hyogo Japan
| | - Yasuhiro Morisaki
- Department of Applied Chemistry for Environment School of Science and Technology Kwansei Gakuin University 2‐1 Gakuen 669‐1337 Sanda Hyogo Japan
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6
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Feng Z, Yu Y, Yang X, Wu Y, Zhou G, Wu Z. Unsymmetric Heteroleptic Ir(III) Complexes with 2-Phenylquinoline and Coumarin-Based Ligand Isomers for Tuning Character of Triplet Excited States and Achieving High Electroluminescent Efficiencies. Inorg Chem 2020; 59:12362-12374. [PMID: 32799532 DOI: 10.1021/acs.inorgchem.0c01443] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
2-Phenylquinoline (PQ) and four coumarin-based ligand isomers with ease of synthesis have been selected to construct the unsymmetric heteroleptic [Ir(C1∧N)(C2∧N)(acac)]-type complex phosphors for organic light-emitting diodes (OLEDs). Six unsymmetric heteroleptic Ir(III) complexes have been obtained by employing four coumarin-based ligand isomers (L-C5/L-C6/L-C7/L-C8) in the [Ir(PQ)(C∧N)(acac)] structure due to two different coordinating carbon atoms in ligands L-C6 and L-C7 to form C-Ir bond. Through adopting unsymmetric heteroleptic [Ir(C1∧N)(C2∧N)(acac)] structure, these Ir(III) complexes can not only achieve impressive absolute quantum yield Φp (ca. 0.5-1.0), higher than that of complex [Ir(PQ)2(acac)] (ca. 0.4), but also realize a dual modulation of both emission color from orange (AIrC6out, λ = 578 nm) to red (AIrC5, λ = 622 nm) and the character of the lowest triplet excited states (T1), showing both 3MLCT character and 3ILCT (intraligand charge transfer) character in their T1 states. AIrC5, AIrC7out, and AIrC7in show MLCT character from Ir(III) center to ligand L-C5 or L-C7 and ILCT character in ligand L-C5 or L-C7 in their T1 states, while AIrC6out, AIrC6in, and AIrC8 show MLCT character from Ir(III) center to ligand PQ and ILCT character in ligand PQ in their T1 states. Moreover, the color-tuning mechanism and the lowest triplet state characters are investigated in detail. AIrC6in and AIrC8 were selected as emitters to evaluate the electroluminescent (EL) performance due to their high ΦP of nearly up to unity. Optimal orange-emitting device B2 based on AIrC8 can give a maximum external quantum efficiency (ηext) of 23.9%, a maximum current efficiency (ηL) of 70.9 cd A-1, and a maximum power efficiency (ηP) of 60.7 lm W-1. All these impressive results can definitely demonstrate the effectiveness of our simple approach for tuning character of the triplet excited states and achieving high-performance Ir-based phosphors in OLEDs.
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Affiliation(s)
- Zhao Feng
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Chemistry, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Yue Yu
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Chemistry, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, PR China.,School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, PR China
| | - Xiaolong Yang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Chemistry, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Yong Wu
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Chemistry, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Guijiang Zhou
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Chemistry, State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Zhaoxin Wu
- Key Laboratory of Photonics Technology for Information, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China.,Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, PR China
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7
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Jiang Z, Wang J, Gao T, Ma J, Liu Z, Chen R. Rational Design of Axially Chiral Platinabinaphthalenes with Aggregation-Induced Emission for Red Circularly Polarized Phosphorescent Organic Light-Emitting Diodes. ACS APPLIED MATERIALS & INTERFACES 2020; 12:9520-9527. [PMID: 31990175 DOI: 10.1021/acsami.9b20568] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Circularly polarized luminescent (CPL) materials have received a lot of interest due to their potential applications in next-generation displays. However, the development of easily accessible red circularly polarized phosphorescent emitters for practical organic light-emitting diodes fabrication remains a grand challenge. In this paper, we report a new family of CPL-active platinum complexes based on the binaphthalene chiral platform. These axially chiral platinabinaphthalenes were facile synthesized by directly incorporating platinum(II) into the π-conjugated backbone of a commercially available enantiopure binaphthalene derivate. These complexes exhibit aggregation-induced circularly polarized phosphorescence enhancement with high quantum yields of up to 66% and luminescence dissymmetry factors of around 2.6 × 10-3. Moreover, solution-processable circularly polarized organic light-emitting diodes (CPOLEDs) using these complexes as emitters show good performance with the maximum luminance of up to 3500 cd m-2 and dissymmetry factor values of around 1.0 × 10-3. These findings by the rational design of axially chiral platinabinaphthalenes are important for the development of high-performance CPL complexes for CPOLEDs.
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Affiliation(s)
- Zhiyong Jiang
- College of Materials Science and Engineering , Nanjing Forestry University , 159 Longpan Road , Xuanwu District, Nanjing 210037 , China
- Key Laboratory of Flexible Electronics, Institute of Advanced Materials , Nanjing Tech University (NanjingTech) , Nanjing 211816 , China
| | - Jun Wang
- Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts & Telecommunications , 9 Weyuan Road , Nanjing 210023 , China
| | - Tingting Gao
- College of Materials Science and Engineering , Nanjing Forestry University , 159 Longpan Road , Xuanwu District, Nanjing 210037 , China
- Key Laboratory of Flexible Electronics, Institute of Advanced Materials , Nanjing Tech University (NanjingTech) , Nanjing 211816 , China
| | - Jianping Ma
- School of Chemistry and Chemical Engineering , Shandong Normal University , Jinan 250014 , China
| | - Zhipeng Liu
- College of Materials Science and Engineering , Nanjing Forestry University , 159 Longpan Road , Xuanwu District, Nanjing 210037 , China
| | - Runfeng Chen
- Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) , Nanjing University of Posts & Telecommunications , 9 Weyuan Road , Nanjing 210023 , China
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8
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Feng Z, Yu Y, Yang X, Zhong D, Song D, Yang H, Chen X, Zhou G, Wu Z. Isomers of Coumarin-Based Cyclometalated Ir(III) Complexes with Easily Tuned Phosphorescent Color and Features for Highly Efficient Organic Light-Emitting Diodes. Inorg Chem 2019; 58:7393-7408. [DOI: 10.1021/acs.inorgchem.9b00534] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | - Yue Yu
- School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, PR China
| | | | | | | | | | | | | | - Zhaoxin Wu
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, PR China
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9
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Feng Z, Sun Y, Yang X, Zhou G. Novel Emission Color‐Tuning Strategies in Heteroleptic Phosphorescent Ir(III) and Pt(II) Complexes. CHEM REC 2019; 19:1710-1728. [DOI: 10.1002/tcr.201800183] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 12/09/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Zhao Feng
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Department of Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong University Xi'an 710049 P. R. China
| | - Yuanhui Sun
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Department of Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong University Xi'an 710049 P. R. China
| | - Xiaolong Yang
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Department of Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong University Xi'an 710049 P. R. China
| | - Guijiang Zhou
- MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Department of Chemistry, School of Science, State Key Laboratory for Mechanical Behavior of MaterialsXi'an Jiaotong University Xi'an 710049 P. R. China
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10
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Li TY, Wu J, Wu ZG, Zheng YX, Zuo JL, Pan Y. Rational design of phosphorescent iridium(III) complexes for emission color tunability and their applications in OLEDs. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.06.014] [Citation(s) in RCA: 163] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Gao TB, Yan RQ, Metherell AJ, Cao DK, Ye DJ, Ward MD. Coordination mode-induced isomeric cyclometalated [Ir(tpy)(nbi)Cl](PF 6) complexes: distinct luminescence, self-assembly and cellular imaging behaviors. Dalton Trans 2018; 46:16787-16791. [PMID: 29168515 DOI: 10.1039/c7dt03523c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two isomeric Ir(iii) complexes Ir-O and Ir-R arising from the different coordination mode of a naphthalene-containing ligand, show distinct luminescence, self-assembly ability and cellular imaging behaviors.
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Affiliation(s)
- Tai-Bao Gao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China.
| | - Run-Qi Yan
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China.
| | | | - Deng-Ke Cao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China.
| | - De-Ju Ye
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China.
| | - Michael D Ward
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK. and Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK
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12
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Chau NY, Ho PY, Ho CL, Ma D, Wong WY. Color-tunable thiazole-based iridium(III) complexes: Synthesis, characterization and their OLED applications. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.11.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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14
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Huang Z, Liu B, He Y, Yan X, Yang X, Xu X, Zhou G, Ren Y, Wu Z. Facilitating triplet energy-transfer in polymetallayne-based phosphorescent polymers with iridium(III) units and the great potential in achieving high electroluminescent performances. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.06.030] [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]
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15
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Liu X, Zhang S, Jin YM, Lu GZ, Jiang L, Liang X, Xu QL, Zheng YX. Syntheses, crystal structure and photophysical property of iridium complexes with 1,3,4-oxadiazole and 1,3,4-thiadiazole derivatives as ancillary ligands. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.02.025] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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16
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Yao C, Xue Z, Lian M, Xu X, Zhao J, Zhou G, Wu Y, Yu D, Wong WY. Phosphorescent iridium(III) complexes based on 2-phenylimidazo[1,2-a]pyridine-type ligands: Synthesis, photophysical, electrochemical, and electrophosphorescent properties. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.05.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Zhou S, Jia D, Liu J. Synthesis and characterization of novel cross-linking light-emitting polyfluorene derivatives. HIGH PERFORM POLYM 2015. [DOI: 10.1177/0954008314544340] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Polyfluorene derivative with amine side groups, namely, P1 was synthesized by the palladium-catalyzed coupling reaction of 2,5-dibromoaniline with 2,7-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-9,9′-dioctylfluorene. Cross-linked polyazomethine P1-TPD (cross-linked polymer, P1/ terephthalic aldehyde) was obtained by the reaction of P1 with terephthalic aldehyde. Given that replacement of the phenylene ring by a thiophene ring can improve π-electron delocalization, we also synthesized P1-TPCD (cross-linked polymer, P1/ 2,5-thiophenedicarboxaldehyde) whose cross-linking bridge was a thiophene ring. The ultraviolet–visible spectra of P1-TPD showed that there was a little hypsochromic shift to its pristine polymer P1, however, the maximum emission wavelength was changed to the second peak in the photoluminescence spectra. Besides, the band gap energy ( Eg) of P1-TPD was a little narrower than that of P1. The maximum absorption wavelength and the maximum emission wavelength of P1-TPCD was almost the same with P1, but its Eg was narrower than P1 and P1-TPD. Most notably, azomethine-linked P1-TPD and P1-TPCD were fluorescent with measured fluorescent quantum yields of 22% and 44%.
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Affiliation(s)
- Su Zhou
- Department of Chemistry, School of Science, Xi’ an Jiaotong University, Xi’an, People’s Republic of China
| | - Dongmei Jia
- Department of Chemistry, School of Science, Xi’ an Jiaotong University, Xi’an, People’s Republic of China
| | - Junfeng Liu
- Department of Chemistry, School of Science, Xi’ an Jiaotong University, Xi’an, People’s Republic of China
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18
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Stokes EC, Langdon-Jones EE, Groves LM, Platts JA, Horton PN, Fallis IA, Coles SJ, Pope SJA. Cationic, luminescent cyclometalated iridium(iii) complexes based on substituted 2-phenylthiazole ligands. Dalton Trans 2015; 44:8488-96. [DOI: 10.1039/c4dt03054k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ten cationic heteroleptic iridium(iii) complexes involving substituted phenylthiazole ligands reveal phosphorescence emission in solution.
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Affiliation(s)
- Emily C. Stokes
- School of Chemistry
- Main Building
- Cardiff University
- Cardiff CF10 3AT
- UK
| | | | - Lara M. Groves
- School of Chemistry
- Main Building
- Cardiff University
- Cardiff CF10 3AT
- UK
| | - James A. Platts
- School of Chemistry
- Main Building
- Cardiff University
- Cardiff CF10 3AT
- UK
| | - Peter N. Horton
- UK National Crystallographic Service
- Chemistry
- Faculty of Natural and Environmental Sciences
- University of Southampton
- England
| | - Ian A. Fallis
- School of Chemistry
- Main Building
- Cardiff University
- Cardiff CF10 3AT
- UK
| | - Simon J. Coles
- UK National Crystallographic Service
- Chemistry
- Faculty of Natural and Environmental Sciences
- University of Southampton
- England
| | - Simon J. A. Pope
- School of Chemistry
- Main Building
- Cardiff University
- Cardiff CF10 3AT
- UK
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19
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Micksch M, Tenne M, Strassner T. C∧N-Cyclometalated Platinum(II) Complexes with Sterically Demanding 1,2-Diarylimidazole Ligands. Organometallics 2014. [DOI: 10.1021/om500383b] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Maik Micksch
- Physikalische
Organische Chemie, Technische Universität Dresden, 01069 Dresden, Germany
| | - Mario Tenne
- Physikalische
Organische Chemie, Technische Universität Dresden, 01069 Dresden, Germany
| | - Thomas Strassner
- Physikalische
Organische Chemie, Technische Universität Dresden, 01069 Dresden, Germany
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20
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Tronnier A, Pöthig A, Metz S, Wagenblast G, Münster I, Strassner T. Enlarging the π system of phosphorescent (C^C*) cyclometalated platinum(II) NHC complexes. Inorg Chem 2014; 53:6346-56. [PMID: 24866934 DOI: 10.1021/ic500971z] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Cyclometalated (C^C*) platinum(II) N-heterocyclic carbene (NHC) complexes are emerging as a new class of phosphorescent emitters for the application in organic light-emitting devices (OLEDs). We present the synthesis of six new complexes of this class to investigate the influence of extended π systems. Therefore, six different NHC ligands with a varying number of additional phenyl substituents were used in combination with the monoanionic acetylacetonate (acac) ligand to obtain complexes of the general formula [(NHC)Pt(II)(acac)]. The complexes were fully characterized by standard techniques and advanced spectroscopic methods ((195)Pt NMR). For all complexes the solid-state structure determination revealed a square-planar coordination of the platinum atom. Absorption and emission spectra were measured in thin amorphous poly(methyl methacrylate) films at room temperature. Four compounds emit in the blue-green region of the visible spectrum with quantum yields of up to 81%.
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Affiliation(s)
- Alexander Tronnier
- Physikalische Organische Chemie, Technische Universität Dresden , 01069 Dresden, Germany
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Yao C, Jiao B, Yang X, Xu X, Dang J, Zhou G, Wu Z, Lv X, Zeng Y, Wong WY. Tris(cyclometalated) Iridium(III) Phosphorescent Complexes with 2-Phenylthiazole-Type Ligands: Synthesis, Photophysical, Redox and Electrophosphorescent Behavior. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300595] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
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|
Wu W, Yang P, Ma L, Lalevée J, Zhao J. Visible-Light Harvesting PtIIComplexes as Singlet Oxygen Photosensitizers for Photooxidation of 1,5-Dihydroxynaphthalene. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200665] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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