1
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Tao P, Lv Z, Zhao FQ, Zheng XK, Jiang H, Li W, Deng Y, Liu S, Xie G, Wong WY, Zhao Q. One-Pot Synthesis of Acetylacetonate-Based Isomeric Phosphorescent Cyclometalated Iridium(III) Complexes via Random Cyclometalation: A Strategy for Excited-State Manipulation. Inorg Chem 2023; 62:1202-1209. [PMID: 36622043 DOI: 10.1021/acs.inorgchem.2c03597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The excited-state manipulation of the phosphorescent iridium(III) complexes plays a vital role in their photofunctional applications. The development of the molecular design strategy promotes the creative findings of novel iridium(III) complexes. The current molecular design strategies for iridium(III) complexes mainly depend on the selective cyclometalation of the ligands with the iridium(III) ion, which is governed by the steric hindrance of the ligand during the cyclometalation. Herein, a new molecular design strategy (i.e., random cyclometalation strategy) is proposed for the effective excited-state manipulation of phosphorescent cyclometalated iridium(III) complexes. Two series of new and separable methoxyl-functionalized isomeric iridium(III) complexes are accessed by a one-pot synthesis via random cyclometalation, resulting in a dramatic tuning of the phosphorescence peak wavelength (∼57 nm) and electrochemical properties attributed to the high sensitivity of their excited states to the position of the methoxyl group. These iridium(III) complexes show intense phosphorescence ranging from the yellow (567 nm) to the deep-red (634 nm) color with high photoluminescence quantum yields of up to 0.99. Two deep-red emissive iridium(III) complexes with short decay lifetimes are further utilized as triplet emitters to afford efficient solution-processed electroluminescence with reduced efficiency roll-offs.
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Affiliation(s)
- Peng Tao
- State Key Laboratory of Organic Electronics and Information Displays, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, P. R. China.,Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, P. R. China.,The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, P. R. China
| | - Zhuang Lv
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, P. R. China
| | - Fang-Qing Zhao
- State Key Laboratory of Organic Electronics and Information Displays, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, P. R. China
| | - Xiao-Kang Zheng
- State Key Laboratory of Organic Electronics and Information Displays, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, P. R. China.,Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, P. R. China
| | - He Jiang
- Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, P. R. China
| | - Wentao Li
- Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, P. R. China
| | - Yongjing Deng
- State Key Laboratory of Organic Electronics and Information Displays, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, P. R. China
| | - Shujuan Liu
- State Key Laboratory of Organic Electronics and Information Displays, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, P. R. China
| | - Guohua Xie
- Sauvage Center for Molecular Sciences, Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, Department of Chemistry, Wuhan University, Wuhan 430072, P. R. China
| | - Wai-Yeung Wong
- Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, P. R. China.,The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, P. R. China
| | - Qiang Zhao
- State Key Laboratory of Organic Electronics and Information Displays, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, P. R. China
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2
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Tao P, Lv Z, Zheng XK, Jiang H, Liu S, Wang H, Wong WY, Zhao Q. Isomer Engineering of Lepidine-Based Iridophosphors for Far-Red Hypoxia Imaging and Photodynamic Therapy. Inorg Chem 2022; 61:17703-17712. [DOI: 10.1021/acs.inorgchem.2c02854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peng Tao
- State Key Laboratory of Organic Electronics and Information Displays, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China
- Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, P. R. China
| | - Zhuang Lv
- State Key Laboratory of Organic Electronics and Information Displays, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou 221004, China
| | - Xiao-Kang Zheng
- Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, P. R. China
- MOE Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Taiyuan 030024, China
| | - He Jiang
- Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, P. R. China
| | - Shujuan Liu
- State Key Laboratory of Organic Electronics and Information Displays, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Hua Wang
- MOE Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Taiyuan 030024, China
| | - Wai-Yeung Wong
- Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
- The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, P. R. China
| | - Qiang Zhao
- State Key Laboratory of Organic Electronics and Information Displays, Institute of Advanced Materials (IAM) & Institute of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China
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3
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Wen LL, Zang CX, Gao Y, Li GF, Shan GG, Wang XL, Shao KZ, Xie WF, Su ZM. Rational Design of Ir(III) Phosphors to Strategically Manage Charge Recombination for High-Performance White Organic Light-Emitting Diodes. Inorg Chem 2022; 61:3736-3745. [PMID: 35175759 DOI: 10.1021/acs.inorgchem.1c03897] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Constructing high-quality white organic light-emitting diodes (WOLEDs) remains a big challenge because of high demands on the electroluminescence (EL) performance including high efficiency, excellent spectral stability, and low roll-off simultaneously. To achieve effective energy transfer and trap-assisted recombination in the emissive layer, herein, four Ir(III) phosphors, namely, mOMe-Ir-PI (1), pOMe-Ir-PI (2), mOMe-Ir-PB (3), and pOMe-Ir-PB (4), were strategically designed via simple regulation of the substituent moiety and π conjugation of the chelated ligands. Their photophysical and EL properties were systematically investigated. When these phosphors are employed as doped emitters, the monochromic green organic light-emitting diodes not only exhibit a superior performance with the characteristics of 50.2 cd A-1, 39.2 lm W-1, and 15.1%, but also maintain a negligible roll-off ratio of 0.2% at 1000 cd m-2, which are better than those of commercial green Ir(ppy)2acac and Ir(ppy)3 in the same device configuration. Inspired by these outstanding performances, we successfully fabricated the warm WOLED utilizing 2 as a green component, affording a peak efficiency of 42.0 cd A-1, 29.3 lm W-1, and 18.6% and retaining at 39.9 cd A-1, 23.7 lm W-1, and 17.4% even at 1000 cd m-2. The results herein demonstrate the superiority of the molecular design and propose a simple method toward the development of promising Ir(III) phosphors for high-efficiency WOLEDs.
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Affiliation(s)
- Li-Li Wen
- Institute of Functional Material Chemistry and National and Local United Engineering Laboratory for Power Battery, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.,School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, P. R. China
| | - Chun-Xiu Zang
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012, P. R. China
| | - Ying Gao
- Institute of Functional Material Chemistry and National and Local United Engineering Laboratory for Power Battery, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Guang-Fu Li
- Institute of Functional Material Chemistry and National and Local United Engineering Laboratory for Power Battery, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Guo-Gang Shan
- Institute of Functional Material Chemistry and National and Local United Engineering Laboratory for Power Battery, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.,School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, P. R. China
| | - Xin-Long Wang
- Institute of Functional Material Chemistry and National and Local United Engineering Laboratory for Power Battery, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Kui-Zhan Shao
- Institute of Functional Material Chemistry and National and Local United Engineering Laboratory for Power Battery, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Wen-Fa Xie
- State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012, P. R. China
| | - Zhong-Min Su
- Institute of Functional Material Chemistry and National and Local United Engineering Laboratory for Power Battery, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.,School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, P. R. China
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4
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Adamovich V, Benavent L, Boudreault PLT, Esteruelas MA, López AM, Oñate E, Tsai JY. Pseudo-Tris(heteroleptic) Red Phosphorescent Iridium(III) Complexes Bearing a Dianionic C, N, C', N'-Tetradentate Ligand. Inorg Chem 2021; 60:11347-11363. [PMID: 34291933 PMCID: PMC9179949 DOI: 10.1021/acs.inorgchem.1c01303] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
![]()
1-Phenyl-3-(1-phenyl-1-(pyridin-2-yl)ethyl)isoquinoline
(H2MeL) has been prepared by Pd(N-XantPhos)-catalyzed
“deprotonative cross-coupling processes”
to synthesize new phosphorescent red iridium(III) emitters (601–732
nm), including the carbonyl derivative Ir(κ4-cis-C,C′-cis-N,N′-MeL)Cl(CO)
and the acetylacetonate compound Ir(κ4-cis-C,C′-cis-N,N′-MeL)(acac). The tetradentate
6e-donor ligand (6tt′) of these complexes is formed by two
different bidentate units, namely, an orthometalated 2-phenylisoquinoline
and an orthometalated 2-benzylpyridine. The link between the bidentate
units reduces the number of possible stereoisomers of the structures
[6tt′ + 3b] (3b = bidentate 3e-donor ligand), with respect
to a [3b + 3b′ + 3b″] emitter containing three free
bidentate units, and it permits a noticeable stereocontrol. Thus,
the isomers fac-Ir(κ4-cis-C,C′-cis-N,N′-MeL){κ2-C,N-(C6H4-py)}, mer-Ir(κ4-cis-C,C′-cis-N,N′-MeL){κ2-C,N-(C6H3R-py)}, and mer-Ir(κ4-trans-C,C′-cis-N,N′-MeL){κ2-C,N-(C6HR-py)} (R =
H, Me) have also been selectively obtained. The new emitters display
short lifetimes (0.7–4.6 μs) and quantum yields in a
doped poly(methyl methacrylate) film at 5 wt % and 2-methyltetrahydrofuran
at room temperature between 0.08 and 0.58. The acetylacetonate complex
Ir(κ4-cis-C,C′-cis-N,N′-MeL)(acac) has been used as a dopant for a red
PhOLED device with an electroluminescence λmax of
672 nm and an external quantum efficiency of 3.4% at 10 mA/cm2. The proligand 1-phenyl-3-(1-phenyl-1-(pyridine-2-yl)ethyl)isoquinoline
is used to generate a new family of neutral phosphorescent red iridium(III)
emitters containing a tetradentate ligand, formed by two different
bidentate units, and a third bidentate ligand with a good stereocontrol
of the resulting [6tt′ + 3b] products. One of the new emitters
has been used in the fabrication of an OLED device.
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Affiliation(s)
- Vadim Adamovich
- Universal Display Corporation, Ewing, New Jersey 08618, United States
| | - Llorenç Benavent
- 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
| | - Enrique Oñate
- 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
| | - Jui-Yi Tsai
- Universal Display Corporation, Ewing, New Jersey 08618, United States
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5
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Ding L, Zang CX, Wen L, Shan GG, Gao Y, Sun HZ, Xie WF, Su ZM. High-Performance and Stable Warm White OLEDs Based on Orange Iridium(III) Phosphors Modified with Simple Alkyl Groups. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00472] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lei Ding
- Institute of Functional Material Chemistry and National & Local United Engineering Lab for Power Battery, Faculty of Chemistry, Northeast Normal University, Changchun 130024, People’s Republic of China
| | - Chun-Xiu Zang
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012, People’s Republic of China
| | - Li−Li Wen
- Institute of Functional Material Chemistry and National & Local United Engineering Lab for Power Battery, Faculty of Chemistry, Northeast Normal University, Changchun 130024, People’s Republic of China
| | - Guo-Gang Shan
- Institute of Functional Material Chemistry and National & Local United Engineering Lab for Power Battery, Faculty of Chemistry, Northeast Normal University, Changchun 130024, People’s Republic of China
| | - Ying Gao
- Jilin Engineering Normal University Changchun 130052, People’s Republic of China
| | - Hai-Zhu Sun
- Institute of Functional Material Chemistry and National & Local United Engineering Lab for Power Battery, Faculty of Chemistry, Northeast Normal University, Changchun 130024, People’s Republic of China
| | - Wen-Fa Xie
- State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012, People’s Republic of China
| | - Zhong-Min Su
- Institute of Functional Material Chemistry and National & Local United Engineering Lab for Power Battery, Faculty of Chemistry, Northeast Normal University, Changchun 130024, People’s Republic of China
- School of Chemistry & Environmental Engineering, Changchun University of Science and Technology, Changchun, Jilin 130012, People’s Republic of China
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6
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Su N, Yang HQ, Zheng YX, Chen ZX. Sulfur atom containing ligands induced rapid room temperature synthesis of red iridium(iii) complexes with Ir–S–P–S structures for OLEDs. NEW J CHEM 2019. [DOI: 10.1039/c9nj01599j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two red iridium(iii) complexes containing a four-membered ring Ir–S–P–S backbone were synthesized at room temperature in 5 min, and their OLEDs exhibit an EQEmax of 19.90%.
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Affiliation(s)
- Ning Su
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
| | - Hui-Qing Yang
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
| | - You-Xuan Zheng
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
| | - Zhao-Xu Chen
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
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