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Hu J, Pei J, Tang W, Fan C. Synthesis and Optoelectronic Properties of a Novel Pt(IV)(C∧N∧C)(Cl) 2(DMSO) Complex Cyclometalated by Tridentate Diphenylpyridine. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2024; 35:357-364. [PMID: 38252030 DOI: 10.1021/jasms.3c00380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
A novel tridentate-cyclometalating Pt(IV) complex, namely, Pt(IV)(C∧N∧C)(Cl)2(DMSO), is initially synthesized through a series of reactions using Pt(II) complexes. The optoelectronic properties of Pt(IV)(C∧N∧C)(Cl)2(DMSO) are fully studied by adequate characterizations.
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Affiliation(s)
- Jiahui Hu
- School of Materials and Energy, University of Electronic Science and Technology of China (UESTC), Chengdu 611731, P. R. China
| | - Jingfang Pei
- School of Materials and Energy, University of Electronic Science and Technology of China (UESTC), Chengdu 611731, P. R. China
| | - Wu Tang
- School of Materials and Energy, University of Electronic Science and Technology of China (UESTC), Chengdu 611731, P. R. China
| | - Cong Fan
- School of Materials and Energy, University of Electronic Science and Technology of China (UESTC), Chengdu 611731, P. R. China
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Xia BH, Ma YS, Bai FQ. Density Functional Calculation and Evaluation of the Spectroscopic Properties and Luminescent Material Application Potential of the N-Heterocyclic Platinum(II) Tetracarbene Complexes. Molecules 2024; 29:524. [PMID: 38276602 PMCID: PMC10820303 DOI: 10.3390/molecules29020524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/14/2024] [Accepted: 01/16/2024] [Indexed: 01/27/2024] Open
Abstract
A series of reported Pt(II) carbene complexes possibly have the ability to serve as the new generation of blue emitters in luminescent devices because of their narrow emission spectra, high photoluminescence quantum yields (PLQYs), and rigid molecular skeleton. However, the combination of all carbene ligands with different multidentate structures will affect the overall planarity and horizontal dipole ratio to varying degrees, but the specific extent of this effect has not previously been analyzed in detail. In this work, density functional computation is used to study a class of platinum tetracarbene bidentate complexes with similar absorption and emission band characteristics, which is the main reason for the remarkable difference in quantum efficiency due to subtle differences in electronic states caused by different ligands. From the calculation results, the major reason, which results in significantly decrease in quantum efficiency for [Pt(cyim)2]2+, is that [Pt(cyim)2]2+ can reach the non-radiative deactivation metal-centered d-d excited state through an easier pathway compared with [Pt(meim)2]2+. The result, based on changes in the dihedral angle between ligands, can achieve the goal of improving and designing materials by adjusting the degree of the dihedral angle. (meim: bis(1,1'-dimethyl-3,3'-methylene-diimidazoline-2,2'-diylidene); cyim: bis(1,1'-dicyclohexyl-3,3'-methylene-diimidazoline-2,2'-diylidene).
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Affiliation(s)
- Bao-Hui Xia
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry, College of Chemistry, Jilin University, Changchun 130023, China
| | - Yin-Si Ma
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry, College of Chemistry, Jilin University, Changchun 130023, China
| | - Fu-Quan Bai
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry, College of Chemistry, Jilin University, Changchun 130023, China
- State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, China
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3
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Hua L, Zhang KY, Liu HW, Chan KS, Lo KKW. Luminescent iridium(III) porphyrin complexes as near-infrared-emissive biological probes. Dalton Trans 2023; 52:12444-12453. [PMID: 37594412 DOI: 10.1039/d3dt02104a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
We report herein the design, synthesis and characterisation of a series of luminescent iridium(III) porphyrin complexes [Ir(ttp)(CH2CH2OH)] (H2ttp = 5,10,15,20-tetra-4-tolylporphyrin) (1), [Ir(tpp-Ph-NO2)(CO)Cl] (H2tpp-Ph-NO2 = 5-(4-((4-nitrophenoxy)carbonyloxymethyl)phenyl)-10,15,20-triphenylporphyrin) (2), [Ir(tpp-COOMe)(Py)2](Cl) (H2tpp-COOMe = 5-(4-methoxycarbonylphenyl)-10,15,20-triphenylporphyrin; Py = pyridine) (3) and [Ir(tpp-COOH)(Py)2](Cl) (H2tpp-COOH = 5-(4-carboxylphenyl)-10,15,20-triphenylporphyrin) (4). All the complexes displayed long-lived near-infrared (NIR) emission attributed to an excited state of mixed triplet intraligand (3IL) (π → π*) (porphyrin) and triplet metal-to-ligand charge transfer (3MLCT) (dπ(Ir) → π*(porphyrin)) character. The cytotoxicity of the complexes toward HeLa cells was examined by the 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyltetrazolium bromide (MTT) assay. The cationic complexes 3 and 4 exhibited higher cytotoxic activity toward HeLa cells than their neutral counterparts 1 and 2. Cellular uptake studies by inductively coupled plasma-mass spectrometry (ICP-MS) and laser-scanning confocal microscopy (LSCM) indicated that complexes 3 and 4 showed higher cellular uptake efficiencies than complexes 1 and 2 due to their cationic charge, and they were enriched in the perinuclear region of the cells with negligible nuclear uptake. Additionally, the carboxyl complex 4 was used to label a model protein bovine serum albumin (BSA) via an amidation reaction. The resultant luminescent protein conjugate 4-BSA displayed similar photophysical properties and intracellular localisation behaviour to its parent complex. The results of this work will contribute to the development of luminescent iridium(III) porphyrin complexes and related bioconjugates as NIR-emissive probes for bioimaging applications.
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Affiliation(s)
- Lijuan Hua
- Department of Chemistry, Bengbu Medical College, Donghai Avenue, Bengbu, Anhui, 233030, P. R. China.
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P. R. China
| | - Kenneth Yin Zhang
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P. R. China
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, P. R. China
| | - Hua-Wei Liu
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P. R. China
| | - Kin-Shing Chan
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, P. R. China
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China
| | - Kenneth Kam-Wing Lo
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P. R. China
- State Key Laboratory of Terahertz and Millimetre Waves, City University of Hong Kong, Tat Chee Avenue, Hong Kong, P. R. China
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Comprehensive investigation of triplet states of red phosphorescent cationic Ir(III) complexes from cryogenic temperature. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2022. [DOI: 10.1007/s13738-022-02680-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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5
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Efficient synthesis of celecoxib and pyrazole derivatives on heterogeneous Ga-MCM-41-SO3H catalyst under mild condition. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02452-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kim D, Ahn M, Wee KR, Cho DW. Influence of picolinate ancillary ligands on unique photophysical properties of Ir(ppz) 2(LX). Phys Chem Chem Phys 2022; 24:13074-13082. [PMID: 35587699 DOI: 10.1039/d2cp01071b] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Homoleptic fac-Ir(ppz)3 (ppz = phenylpyrazole) and a series of heteroleptic Ir(ppz)2(LX) complexes consisting of picolinic acid (pic), 3-hydroxypicolinic acid (picOH), and isoquinolinecarboxylic acid (iq) as ancillary ligands (LX) were synthesised to investigate the influence of the ancillary ligands on the photophysical properties of the complexes. Generally, the role of the ancillary ligand is considered insignificant compared to that of the main ligand. Ir(ppz)3 showed deep-blue emission with a vibronic structure at 77 K, whereas Ir(ppz)2(LX) showed a broad and red-shifted emission. Theoretical calculations of the molecular orbitals and energy levels were performed using density functional theory to understand the effect of the ancillary ligands on the emission changes. The 3MLCTppz state was calculated to be higher than the 3MLCTLX state. Therefore, interligand energy transfer (ILET) between the main and ancillary ligands can occur exothermically in the triplet state. The dynamics of the ILET process were monitored directly using a femtosecond time-resolved transient absorption (TA) spectroscopic technique. The 3MLCTppz state was generated upon excitation at 290 nm, and the intensity of the TA band related to the 3MLCTppz state decreased as the time delay increased. Concurrently, the TA band related to the 3MLCTLX state intensified. On the other hand, no further changes in the TA spectra were observed upon direct excitation of the 3MLCTLX state at 420 nm. In contrast with other Ir(ppz)2(LX) complexes, Ir(ppz)2(picOH) produced long-lived TA species, attributed to excited-state intramolecular proton transfer of the picOH ligand in the excited singlet state.
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Affiliation(s)
- Daehoon Kim
- Department of Chemistry, Daegu University, Gyeongsan 38453, Republic of Korea.
| | - Mina Ahn
- Department of Chemistry, Daegu University, Gyeongsan 38453, Republic of Korea.
| | - Kyung-Ryang Wee
- Department of Chemistry, Daegu University, Gyeongsan 38453, Republic of Korea.
| | - Dae Won Cho
- Center for Photovoltaic Materials, Korea University, Sejong Campus, Sejong 30019, Korea.
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Iridium complexes having phosphrous ligands of large steric hindrance: Photophysical comparison between solution state, solid state and electrospun fibers. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Zhang M, Zhang SW, Wu C, Li W, Wu Y, Yang C, Meng Z, Xu W, Tang MC, Xie R, Meng H, Wei G. Fine Emission Tuning from Near-Ultraviolet to Saturated Blue with Rationally Designed Carbene-Based [3 + 2 + 1] Iridium(III) Complexes. ACS APPLIED MATERIALS & INTERFACES 2022; 14:1546-1556. [PMID: 34978413 DOI: 10.1021/acsami.1c19127] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
We designed and synthesized a new class of six phosphorescent [3 + 2 + 1] iridium(III) complexes [(pbib)Ir(C^C)CN] bearing a tridentate 1,3-bis(1-butylimidazolin-2-ylidene) phenyl N-heterocyclic carbene (NHC)-based pincer ligand (pbib), bidentate imidazole-based NHC ligands (C^C), and a monodentate cyano group and investigated their photophysical, electrochemical, and thermal stabilities and electroluminescent properties. The extended π-conjugation of the imidazole-based C^C ligand is found to be the key to fine-tune the emission energies from ultraviolet blue (λ = 378 nm) to saturated blue (λ = 482 nm), as shown by electrochemical and photophysical studies, which is also revealed by the density functional theory (DFT) and time-dependent DFT calculations. Vacuum-deposited organic light-emitting diode devices have been fabricated with these newly synthesized emitters and exhibited the best external quantum efficiency of 6.4% and Commission International de L'Éclairage (CIE) coordinates of (0.163, 0.096), where the CIE y is very similar to the National Television System Committee standard blue CIE (x, y) coordinates of (0.149, 0.085). These results indicate that the novel [3 + 2 + 1] coordinated iridium(III) complexes [(pbib)Ir(C^C)CN], having a saturated blue emission, not only could alleviate the photodegradation of the emitters when compared to [(pbib)Ir(pmi)CN] but also provide new design strategies of saturated-blue-emitting iridium(III) complexes.
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Affiliation(s)
- Meng Zhang
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen 518055, China
- Institute of Materials Science, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Si-Wei Zhang
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen 518055, China
- Institute of Materials Science, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Chengcheng Wu
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen 518055, China
- Institute of Materials Science, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Wansi Li
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen 518055, China
- Institute of Materials Science, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Yuan Wu
- PURI Materials, Shenzhen 518133, China
| | - Chen Yang
- PURI Materials, Shenzhen 518133, China
| | - Zhimin Meng
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Peking University, Shenzhen 518055, China
| | - Wenzhan Xu
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen 518055, China
- Institute of Materials Science, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Man-Chung Tang
- Institute of Materials Science, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Rongjun Xie
- College of Materials, Xiamen University, Xiamen 361005, China
| | - Hong Meng
- School of Advanced Materials, Peking University, Shenzhen Graduate School, Peking University, Shenzhen 518055, China
| | - Guodan Wei
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University, Shenzhen 518055, China
- Institute of Materials Science, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
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Synthetic advances in C(sp2)-H/N–H arylation of pyrazole derivatives through activation/substitution. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Xie J, Chen X, Li H, Chen Z. On bio-MOF materials doped with phosphorescent iridium complexes for molecular oxygen determination: Synthesis, characterization and performance. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 261:120041. [PMID: 34139662 DOI: 10.1016/j.saa.2021.120041] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 05/24/2021] [Accepted: 05/30/2021] [Indexed: 06/12/2023]
Abstract
In this paper, two phosphorescent Ir(III) complexes, Ir(ppy)2(Ln), were synthesized using 2-phenyl pyridine (ppy) as the first (major) ligand and two phosphorous compounds (L1 and L2) as the auxiliary ligand. Their single crystal structure and electronic structure were discussed. Ir(ppy)2(Ln) complexes were doped into a supporting matrix of bio-MOF-1 via cationic exchange to ensure their uniform distribution. Their successful doping was confirmed by SEM, fluorescence microscopy image, XRD, N2 adsorption/desorption and ICP measurement. Their photophysical parameters, including absorption spectra, excitation spectra, emission spectra, emission lifetime and quantum yield, were discussed in detail. Their phosphorescent emission was confirmed by density functional theory and emission lifetime, making them applicable for oxygen sensing. Linear working curves were observed for both composite samples, showing sensitivity as high as 23.65 with response/recovery time of 9/22 s. Humidity effect on sensing performance was limited. These parameters were found superior to literature ones based on phosphorescent Cu(I), RE(III), Ru(II) and Re(I) complexes. The sensing mechanism was revealed as a dynamic collision between Ir(ppy)2(Ln) and O2 molecules. The novelty of this work was the combination of phosphorescent Ir(III) complexes with porous bio-MOF-1, resulting in greatly improved sensitivity and linear sensing with short response time.
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Affiliation(s)
- Jiali Xie
- Department of Chemistry, Renmin University of China, Beijing 100872, PR China
| | - Xiang Chen
- Department of Chemistry, Capital Normal University, Beijing 100048, PR China
| | - Huanrong Li
- Department of Chemistry, Renmin University of China, Beijing 100872, PR China.
| | - Zhenbo Chen
- Department of Chemistry, Capital Normal University, Beijing 100048, PR China.
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Fang H, Sun J, Yan C. Convenient Construction of Spiro[pyrazole‐4,1′‐pyrido[2,1‐
a
]isoquinoline] and Spiro[pyrazole‐4,4′‐pyrido[1,2‐
a
]quinoline] via Three‐Component Reaction. ChemistrySelect 2021. [DOI: 10.1002/slct.202102255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hui‐Ling Fang
- School of Chemistry & Chemical Engineering Yangzhou University Yangzhou 225002 China
| | - Jing Sun
- School of Chemistry & Chemical Engineering Yangzhou University Yangzhou 225002 China
| | - Chao‐Guo Yan
- School of Chemistry & Chemical Engineering Yangzhou University Yangzhou 225002 China
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Two Luminescent Iridium Complexes with Phosphorous Ligands and Their Photophysical Comparison in Solution, Solid and Electrospun Fibers: Decreased Aggregation-Caused Emission Quenching by Steric Hindrance. MATERIALS 2021; 14:ma14185419. [PMID: 34576642 PMCID: PMC8471204 DOI: 10.3390/ma14185419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 09/14/2021] [Accepted: 09/16/2021] [Indexed: 12/26/2022]
Abstract
In this paper, we prepared two phosphorescent Ir complexes with ligands of 2-phenyl pyridine (ppy), and two phosphorous ligands with large steric hindrance, hoping to allow enough time for the transformation of the highly phosphorescent 3MLLCT (metal-to-ligand-ligand-charge-transfer) excited state. Their large steric hindrance minimized the π-π interaction between complex molecules, so that the aggregation-induced phosphorescence emission (AIPE) influence could be minimized. Their single crystals indicated that they took a distorted octahedral coordination mode. Photophysical comparison between these Ir complexes in solution, in the solid state and in electrospun fibers was performed to confirm the realization of limited aggregation-caused quenching (ACQ). The potential surface crossing and energy transfer from 3MLBPECT/3MLBPELppyCT to 3MLppyCT in these Ir complexes were revealed by density functional theory calculation and temperature-dependent emission. It was confirmed that these two phosphorous ligands offered large steric hindrance, which decreased the ACQ effect, allowing the efficient emissive decay of the 3MLppyCT excited state. This is one of the several luminescent Ir complexes with a high emission yield (Φ = 0.27) and long emission lifetime (0.43 μs) in the solid state.
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Wu Y, Yang C, Liu J, Zhang M, Liu W, Li W, Wu C, Cheng G, Yang Q, Wei G, Che CM. Phosphorescent [3 + 2 + 1] coordinated Ir(iii) cyano complexes for achieving efficient phosphors and their application in OLED devices. Chem Sci 2021; 12:10165-10178. [PMID: 34377406 PMCID: PMC8336439 DOI: 10.1039/d1sc01426a] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 06/21/2021] [Indexed: 11/29/2022] Open
Abstract
A series of neutral [3 + 2 + 1] coordinated iridium complexes bearing tridentate bis-NHC carbene chelates (2,6-bisimidazolylidene benzene), bidentate chelates (C^N ligands, e.g. derivatives of 2-phenylpridine), and monodentate ions (halides and pseudo-halides, such as Br, I, OCN and CN ions) have been systematically designed and synthesized. X-ray single crystal structure characterization revealed that the nitrogen atom in C^N ligands is located trans to the carbon atom in the benzene ring in tridentate chelates, while the coordinating carbon atom in C^N ligands is located trans to the monodentate ligands. Photophysical studies reveal that the C^N ligands play a vital role in tuning the UV absorption and emission properties, while the tridentate bis-NHC carbene chelates influence the lowest absorption band and emission energy when compared to heteroleptic Ir(ppy)2(acac) [i.e. molar absorptivities at ∼450 nm for ppy-OCN and Ir(ppy)2(acac) are 350 M-1 cm-1 and 1520 M-1 cm-1 and emission maximum peaks are at 465 nm and 515 nm respectively]. Among monodentate ligands that the complexes bear, the group containing the cyanide ligand displays higher emission energy, higher photophysical quantum yields, longer triplet lifetimes and better electrochemical and thermal stabilities than those of cyanate and bromide. Particularly, a blue organic light-emitting diode (OLED) based on dfppy-CN exhibited a maximum external quantum efficiency of 22.94% with CIE coordinates of (0.14, 0.24). Furthermore, a small efficiency roll-off of 5.7% was observed for this device at 1000 cd m-2.
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Affiliation(s)
- Yuan Wu
- PURI Materials 6F, Block A, Jiazhaoye Xindong Kechuang Park, 71st Zone Xindong, Baoan District Shenzhen 518133 China
| | - Chen Yang
- PURI Materials 6F, Block A, Jiazhaoye Xindong Kechuang Park, 71st Zone Xindong, Baoan District Shenzhen 518133 China
- School of Chemical Engineering and Light Industry, Guangdong University of Technology Guangzhou 510006 China
| | - Jie Liu
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University Xi'an 710049 China
| | - Meng Zhang
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua Shenzhen International Graduate School, Tsinghua University Shenzhen 518055 China
| | - Weiqiang Liu
- State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong SAR China
| | - Wansi Li
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua Shenzhen International Graduate School, Tsinghua University Shenzhen 518055 China
| | - Chengcheng Wu
- PURI Materials 6F, Block A, Jiazhaoye Xindong Kechuang Park, 71st Zone Xindong, Baoan District Shenzhen 518133 China
| | - Gang Cheng
- State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, Department of Chemistry, The University of Hong Kong Pokfulam Road Hong Kong SAR China
- HKU Shenzhen Institute of Research and Innovation Shenzhen 518053 China
| | - Qingdan Yang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology Guangzhou 510006 China
| | - Guodan Wei
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua Shenzhen International Graduate School, Tsinghua University Shenzhen 518055 China
| | - Chi-Ming Che
- State Key Laboratory of Synthetic Chemistry, HKU-CAS Joint Laboratory on New Materials, 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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Patki AS, Patil KN, Kusuma S, Muley DB, Jadhav AH. One-pot synthesis of multicomponent pyrazole-4-carbonitrile derivatives under solvent-free condition by using engineered polyvinyl alcohol catalyst. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-021-04450-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Kim JH, Kim SY, Choi S, Son HJ, Kang SO. Peripheral Ligand Effect on the Photophysical Property of Octahedral Iridium Complex: o-Aryl Substitution on the Phenyl Units of Homoleptic Ir III(C ∧C) 3 Complexes (C ∧C = 1-Phenyl-3-methylimidazolin-2-ylidene- C, C2') for Deep Blue Phosphorescence. Inorg Chem 2021; 60:246-262. [PMID: 33353297 DOI: 10.1021/acs.inorgchem.0c02882] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
To evaluate the efficacy of ortho-arylation in the second coordination sphere of octahedral iridium complex, a series of homoleptic N-heterocyclic carbene (NHC)-based Ir(C∧CR)3-type complexes were designed and prepared by introducing various substituents (R = H, Me, Ph, MePh, and diMePh) at the ortho-position of the aryl unit of the orthometalated phenyl group. In solution, an unnoticeable increase of emission quantum yields was observed within the variation of the ortho-substituent of the sterically demanding side-branch, a diMePh- group, showing the radiative quantum yield of mer-Ir(C∧CdiMePh)3 (ΦPL = 1.9%), being higher than that of the unsubstituted carbene-based mer-Ir(C∧CH)3 (ΦPL = 1.2%), due to a considerable difference in the nonradiative decay rate (knr = 65.40 × 105 s-1 for mer-Ir(C∧CdiMePh)3 vs knr = 141.1 × 105 s-1 for mer-Ir(C∧CH)3). Such a difference is attributed to the reduction of nonradiative pathway via the 3MLCT → 3MC transition by the widening gap between triplet emissive states and 3MC state, and a rigidity increase in structure by steric hindrance of bulky aryl substituent. In contrast, significant increase of emission quantum yield was observed in the films cast by spin coating, and fac-/mer-Ir(C∧CdiMePh)3 (ΦPL = 60.1/49.1%) were the most efficient ones among NHC-Ir(III) complexes, compatible with the assumption that the secondary coordination effect, i.e. a peripheral constraint, was put into action. As the substituent R increases in size on going from H, Me, Ph, MePh, to diMePh, notable structural changes in the periphery are evident, while an increase of emission quantum yields is also seen. Such a peripheral difference was under scrutiny first with X-ray structural studies, and its manifestation in photophysics was investigated along with quantum calculations that finally addressed the peripheral effect being maximized at R = diMePh. In the application of PhOLED, the mer-Ir(C∧CdiMePh)3-doped multilayer device showed highly enhanced efficiency with an external quantum efficiency (EQE) of up to 8.1%, compared to that of the mer-Ir(C∧CH)3-based device (1.2%), indicating the multiple positive effects of bulky aryl substitution of Ir(III) dopant. A deep-blue CIE chromaticity diagram (0.16, 0.09) was achieved from the device using mer-Ir(C∧CdiMePh)3 as a dopant.
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Affiliation(s)
- Jin-Hyoung Kim
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - So-Yoen Kim
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Sunghan Choi
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Ho-Jin Son
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Sang Ook Kang
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
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16
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Zhou X, Powell BJ. Quantitative calculations of the non-radiative rate of phosphorescent Ir(III) complexes. Phys Chem Chem Phys 2020; 22:27348-27356. [PMID: 33231236 DOI: 10.1039/d0cp04709k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
It has recently been proposed that the dominant non-radiative decay mechanism in blue Ir(iii) phosphors at room temperature is due to the low-lying non-radiative metal-centred triplet states. These are populated thermally via an activated transition from the highly radiative metal-to-ligand-charge-transfer states that are initially populated due to intersystem crossing following the radiative or electronic excitation of the phosphor. We apply transition state theory to quantitatively calculate the non-radiative decay rate of a family of Ir(iii) complexes containing N-heterocyclic carbene (NHC) ligands. We compare the, computationally inexpensive, one-dimensional theory with the, more accurate, multi-dimensional theory. Both methods find a non-radiative rate with an Arrhenius form (knr = kae-ΔE/kBT). The pre-exponential factors, ka, and activation energies, ΔE, are evaluated via density functional theory (DFT). The multi-dimensional theory shows that there is an order of magnitude variation in ka within this family of materials (between 3 × 1011 s-1 and 3 × 1012 s-1). This is not captured by the one-dimensional theory, which predicts very uniform rate constants in the middle of this range (∼1012 s-1). Nevertheless, the activated process involved, and the linear relationship between ka and knr, mean that ka plays a subtle role in determining knr. Consistent with this we find that both methods capture the trend observed experimentally in the non-radiative rates. Furthermore, the magnitude of the calculated knr is similar in both methods and in good agreement with experimental values [except for one complex with a very shallow activation barrier (<0.1 eV)]. It has previously been demonstrated that radiative decay rates can be accurately calculated from DFT. Combined with our results for the non-radiative rates, this implies that DFT methods can accurately predict the emission efficiency in Ir(iii) phosphors. Therefore, DFT calculations are both fast and accurate enough to play a significant role in the design of new deep blue Ir(iii) phosphors with high emission efficiency. Even the one-dimensional theory provides reasonable agreement with experiment. This suggests that a funneling approach - where only the best performing molecules, according to the one-dimensional theory, are studied in the more laborious multi-dimensional framework - could be a powerful strategy for designing active materials for phosphorescent organic light-emitting diodes (PHOLEDs) from first principles.
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Affiliation(s)
- Xiuwen Zhou
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia.
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17
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Abstract
In the last few decades, pyrazole chemistry has attracted chemists’ and biologists’ attention
mainly due to the discovery of the interesting properties of a great number of pyrazole derivatives.
The resulting proliferation of research literature reflects the enormous biological potential of
pyrazole derivatives as antitumor, anti-inflammatory, anti-HIV and antimicrobial agents. This review
focuses on research concerning the antimicrobial activity of pyrazole derivatives conducted from
2010-2018, and is intended to assist in the development of a new generation of antimicrobial drugs.
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Affiliation(s)
- Anshul Bansal
- Department of Chemistry, S. A. Jain (PG) College, Ambala City-134003, India
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18
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Hsu LY, Chen DG, Liu SH, Chiu TY, Chang CH, Jen AKY, Chou PT, Chi Y. Roles of Ancillary Chelates and Overall Charges of Bis-tridentate Ir(III) Phosphors for OLED Applications. ACS APPLIED MATERIALS & INTERFACES 2020; 12:1084-1093. [PMID: 31825583 DOI: 10.1021/acsami.9b16576] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A series of charge-neutral bis-tridentate Ir(III) complexes (1, 3, and 4) were prepared via employing three distinctive tridentate prochelates, that is, (pzptBphFO)H2, [(phpyim)H2·(PF6)], and [(pimb)H3·(PF6)2], which possess one dianionic pzptBphFO, together with a second monoanionic tridentate chelate, namely, (pzptBphFO)H, phpyim, and pimb, respectively. Moreover, a homoleptic, charge-neutral complex 2 was obtained by methylation of chelating (pzptBphFO)H of 1 in basic media, while closely related cationic complexes 5-7 were obtained by further methylation of the remaining pyrazolate unit of previously mentioned neutral complexes 2-4, followed by anion metatheses. All of these Ir(III) metal complexes showed a broadened emission profile with an onset at ∼450 nm, a result of an enlarged ligand-centered ππ* transition gap, but with distinct efficiencies ranging from 0.8% to nearly unity. Comprehensive spectroscopic and computational approaches were executed, providing a correlation for the emission efficiencies versus energy gaps and between the metal-to-ligand charge transfer/ππ* emitting excited state and upper-lying metal-centered dd quenching state. Furthermore, Ir(III) complexes 3 and 4 were selected as dopant emitters in the fabrication of sky-blue phosphorescent organic light-emitting diodes, affording maximum external quantum efficiencies of 16.7 and 14.6% with CIEx,y coordinates of (0.214, 0.454) and (0.191, 0.404) at a current density of 102 cd/m2, respectively. Hence, this research highlights an inherent character of bis-tridentate Ir(III) complexes in achieving high phosphorescence quantum yield at the molecular level.
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Affiliation(s)
- Ling-Yang Hsu
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters , National Tsing Hua University , Hsinchu 30013 , Taiwan
| | - Deng-Gao Chen
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
| | - Shih-Hung Liu
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
| | - Ting-Ya Chiu
- Department of Electrical Engineering , Yuan Ze University , Chung-Li 32003 , Taiwan
| | - Chih-Hao Chang
- Department of Electrical Engineering , Yuan Ze University , Chung-Li 32003 , Taiwan
| | - Alex K-Y Jen
- Department of Materials Science and Engineering and Department of Chemistry , City University of Hong Kong , Kowloon , Hong Kong SAR
| | - Pi-Tai Chou
- Department of Chemistry , National Taiwan University , Taipei 10617 , Taiwan
| | - Yun Chi
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters , National Tsing Hua University , Hsinchu 30013 , Taiwan
- Department of Materials Science and Engineering and Department of Chemistry , City University of Hong Kong , Kowloon , Hong Kong SAR
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Lee S, Han WS. Cyclometalated Ir(iii) complexes towards blue-emissive dopant for organic light-emitting diodes: fundamentals of photophysics and designing strategies. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00001a] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The fundamental photophysics of cyclometalated Ir(iii) complexes and surveys design strategies for efficient blue phosphorescent Ir(iii) complexes are summarised.
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Affiliation(s)
- Sunhee Lee
- Department of Chemistry
- Seoul Women's University
- Seoul 01797
- Republic of Korea
| | - Won-Sik Han
- Department of Chemistry
- Seoul Women's University
- Seoul 01797
- Republic of Korea
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20
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Hazarika R, Konwar M, Damarla K, Kumar A, Sarma D. HBF4/ACN: A simple and efficient protocol for the synthesis of pyrazoles under ambient reaction conditions. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1692869] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
| | | | - Krishnaiah Damarla
- AcSIR, Salt and Marine Chemicals Division, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar, India
| | - Arvind Kumar
- AcSIR, Salt and Marine Chemicals Division, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar, India
| | - Diganta Sarma
- Department of Chemistry, Dibrugarh University, Dibrugarh, India
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21
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Sharma A, Sharma V, Chimni SS. Organocatalytic enantioselective conjugate addition of pyrazolin-5-ones to arylomethylidene malonates. Org Biomol Chem 2019; 17:9514-9523. [PMID: 31657819 DOI: 10.1039/c9ob01700c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient asymmetric organocatalytic conjugate addition reaction of pyrazolin-5-ones with arylomethylidene malonates has been successfully developed by employing bifunctional Cinchona derived thiourea organocatalysts. The protocol provides straightforward access to pyrazole substituted scaffolds in good yields with high stereocontrol.
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Affiliation(s)
- Arun Sharma
- Department of Chemistry, Guru Nanak Dev University, Amritsar-143005, Punjab, India
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22
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Yamada K, Mori H, Sugaya T, Tadokoro M, Maeba J, Nozaki K, Haga MA. Synthesis, X-ray structure, photophysical properties, and theoretical studies of six-membered cyclometalated iridium(iii) complexes: revisiting Ir(pnbi) 2(acac). Dalton Trans 2019; 48:15212-15219. [PMID: 31577291 DOI: 10.1039/c9dt03392k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have determined the X-ray structure of Ir(pnbi)2(acac) (pnbi = 2-phenanthren-9-yl-1-phenyl-1H-benzimidazole; acac = acetylacetonate), which exhibits a six-membered metallocycle around the Ir center. This result stands in sharp contrast to previously postulated structures of Ir(pnbi)2(acac), which assumed a five-membered metallocycle. In this paper, we focus on the relative stability of five- and six-membered Ir(C^N) ring structures. DFT calculations of the total energies of Ir-(C^N) complexes indicated that six-membered structures are more stable when bulky substituents are present in the benzimidazole unit. When the phenanthrene group of pnbi was replaced with a naphthalene moiety, DFT calculations predicted that five-membered cycles are more stable than six-membered rings, which was confirmed experimentally by a single-crystal X-ray diffraction analysis. The steric bulk of the phenanthrene-containing polyaromatic ring ligand thus induces greater interligand repulsion between the two ligands, which plays an important role in determining the cyclometalation route. The Ir complexes examined in this study exhibit red emission (λem ≈ 660 nm) with relatively low quantum yields.
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Affiliation(s)
- Kie Yamada
- Department of Applied Chemistry, Chuo University, Kasuga 1-13-27, Tokyo 112-8551, Bunkyo-ku, Japan.
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23
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Synthesis of substituted dihydro-1H-pyrazoles and 1H-pyrazoles via formal [4+1] annulation of α-arylhydrazonoketones and dimethyl sulfonium methylides. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.01.061] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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24
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Song C, Chen Y, Li J, Zhao F, Zhang H. Unraveling the marked differences of the phosphorescence efficiencies of blue-emitting iridium complexes with isomerized phenyltriazole ligands. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00844f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quantum chemical insights into the marked quantum efficiencies of blue-emitting iridium complexes with isomerized ptz ligands.
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Affiliation(s)
- Chongping Song
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
| | - Yanan Chen
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
| | - Jiaqi Li
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
| | - Fei Zhao
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
| | - Houyu Zhang
- State Key Laboratory of Supramolecular Structure and Materials
- Institute of Theoretical Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
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25
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Chi Y, Wang SF, Ganesan P. Emissive Iridium(III) Complexes with Phosphorous-Containing Ancillary. CHEM REC 2018; 19:1644-1666. [PMID: 30462368 DOI: 10.1002/tcr.201800154] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Accepted: 10/19/2018] [Indexed: 11/10/2022]
Abstract
Ir(III) metal complexes and related emitters bearing all kind of cyclometalated chromophoric chelates and non-chromophoric ancillary are extensively studied during the past three decades. Many of them have been found to display bright room temperature phosphorescence from triplet excited states in both solution and solid states, offering a possible application in contemporary optoelectronic technologies, including organic light emitting diodes, electrochemiluminescence, biological imaging and chemical sensing. Among reported materials, there are Ir(III) complexes with at least one phosphorus (P)-containing ligand and/or ancillary chelate, together with cyclometalates or equivalents that are in control of the actual emission energy. Particularly, possession of P-based donor can lead to divergent structural and photophysical properties compared to the traditional designs. This review aims to provide a literature overview as well as the authors' personal account to the development of relevant Ir(III) based phosphors bearing these P-donors. To the readers' convenience, the contents are subdivided into six sessions, according to whether or not they are charge natural, or with mono- or dianionic electronic character, and in accordance to their divergent bonding modes, i. e. monodentate, bidentate and tripodal coordination. In many cases, the P-based ancillaries offer an easy accessible route to the formation of efficient sky-blue and true-blue emitters due to their π-accepting property, together with enlarged emission energy gap and destabilized upper lying quenching state.
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Affiliation(s)
- Yun Chi
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, 101, Sec. 2, Kuang Fu Road, Hsinchu, 30013, Taiwan.,Department of Chemistry and Department of Materials Sciences and Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong SAR
| | - Sheng Fu Wang
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, 101, Sec. 2, Kuang Fu Road, Hsinchu, 30013, Taiwan
| | - Paramaguru Ganesan
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, 101, Sec. 2, Kuang Fu Road, Hsinchu, 30013, Taiwan
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26
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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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27
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Zuev MA, Sukhanova AA, Smola AG, Prezent MA, Proshin AN, Baranin SV, Bubnov YN. Boron-chelate assisted synthesis of new bipyrazole derivatives. MENDELEEV COMMUNICATIONS 2018. [DOI: 10.1016/j.mencom.2018.11.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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28
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Song C, Tang J, Li J, Wang Z, Li P, Zhang H. Quantum-Chemical Insights into the Phosphorescence Efficiencies of Blue-Emitting Platinum Complexes with Phenylene-Bridged Pincer Ligands. Inorg Chem 2018; 57:12174-12186. [DOI: 10.1021/acs.inorgchem.8b01828] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chongping Song
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Jia Tang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Jiaqi Li
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Zhixiang Wang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Ping Li
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Houyu Zhang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun 130012, P. R. China
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29
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Urinda S, Das G, Pramanik A, Sarkar P. Essential Role of Ancillary Ligand in Color Tuning and Quantum Efficiency of Ir(III) Complexes with N-Heterocyclic or Mesoionic Carbene Ligand: A Comparative Quantum Chemical Study. J Phys Chem A 2018; 122:7532-7539. [DOI: 10.1021/acs.jpca.8b05376] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Sharmistha Urinda
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
| | - Goutam Das
- G.S.S.S.T, Indian Institute of Technology, Kharagpur 721302, India
| | - Anup Pramanik
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
| | - Pranab Sarkar
- Department of Chemistry, Visva-Bharati University, Santiniketan 731235, India
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30
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Zhou X, Powell BJ. Nonradiative Decay and Stability of N-Heterocyclic Carbene Iridium(III) Complexes. Inorg Chem 2018; 57:8881-8889. [DOI: 10.1021/acs.inorgchem.8b00800] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiuwen Zhou
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Benjamin J. Powell
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
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31
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Liao JL, Rajakannu P, Liu SH, Lee GH, Chou PT, Jen AKY, Chi Y. Iridium(III) Complexes Bearing Tridentate Chromophoric Chelate: Phosphorescence Fine-Tuned by Phosphine and Hydride Ancillary. Inorg Chem 2018; 57:8287-8298. [DOI: 10.1021/acs.inorgchem.8b00905] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jia-Ling Liao
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Palanisamy Rajakannu
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Shih-Hung Liu
- Department of Chemistry and Instrumentational Center, National Taiwan University, Taipei 10617, Taiwan
| | - Gene-Hsiang Lee
- Department of Chemistry and Instrumentational Center, National Taiwan University, Taipei 10617, Taiwan
| | - Pi-Tai Chou
- Department of Chemistry and Instrumentational Center, National Taiwan University, Taipei 10617, Taiwan
| | - Alex K.-Y. Jen
- Department of Materials Science and Engineering, Department of Chemistry, City University of Hong Kong, Hong Kong, SAR
| | - Yun Chi
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
- Department of Materials Science and Engineering, Department of Chemistry, City University of Hong Kong, Hong Kong, SAR
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32
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Yoshikawa N, Yamazaki S, Kato N, Kanehisa N, Inoue T, Nakata E, Takashima H. Study of the triplet excited states and DFT calculations of iridium(III) complexes with mixed ligands. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.03.064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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33
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Mai S, Plasser F, Dorn J, Fumanal M, Daniel C, González L. Quantitative wave function analysis for excited states of transition metal complexes. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.01.019] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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34
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Schön F, Leist M, Neuba A, Lang J, Braun C, Sun Y, Niedner-Schatteburg G, Bräse S, Thiel WR. A direct access to heterobimetallic complexes by roll-over cyclometallation. Chem Commun (Camb) 2018; 53:12016-12019. [PMID: 29057406 DOI: 10.1039/c7cc07119a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Complexes of the type [Cp*Ir(N,N')Cl]+ (N,N' = 2-(2-dialkylaminopyrimidin-4-yl)pyrimidine) can undergo roll-over cyclometallation leading to a novel N,N'-donor site. Following this strategy heterobimetallic complexes including iridium(iii) and a Group X metal centre in the oxidation state +II were achieved.
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Affiliation(s)
- F Schön
- Fachbereich Chemie, TU Kaiserslautern, Erwin-Schrödinger-Str. 54, 67663 Kaiserslautern, Germany.
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35
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Congrave DG, Hsu YT, Batsanov AS, Beeby A, Bryce MR. Sky-blue emitting bridged diiridium complexes: beneficial effects of intramolecular π-π stacking. Dalton Trans 2018; 47:2086-2098. [PMID: 29355875 DOI: 10.1039/c7dt04201a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The potential of intramolecular π-π interactions to influence the photophysical properties of diiridium complexes is an unexplored topic, and provides the motivation for the present study. A series of diarylhydrazide-bridged diiridium complexes functionalised with phenylpyridine (ppy)-based cyclometalating ligands is reported. It is shown by NMR studies in solution and single crystal X-ray analysis that intramolecular π-π interactions between the bridging and cyclometalating ligands rigidify the complexes leading to high luminescence quantum efficiencies in solution and in doped films. Fluorine substituents on the phenyl rings of the bridge promote the intramolecular π-π interactions. Notably, these non-covalent interactions are harnessed in the rational design and synthesis of the first examples of highly emissive sky-blue diiridium complexes featuring conjugated bridging ligands, for which they play a vital role in the structural and photophysical properties. Experimental results are supported by computational studies.
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Affiliation(s)
- Daniel G Congrave
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, UK.
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36
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Congrave DG, Batsanov AS, Bryce MR. Highly luminescent 2-phenylpyridine-free diiridium complexes with bulky 1,2-diarylimidazole cyclometalating ligands. Dalton Trans 2018; 47:16524-16533. [DOI: 10.1039/c8dt04043e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
While a number of highly emissive dinuclear Ir(iii) complexes have been reported, they have generally been restricted to structures based on 2-phenylpyridine (Hppy) cyclometalates.
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37
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Kuwabara J, Namekawa T, Sakabe E, Haga MA, Kanbara T. Luminescent Ir(III) complexes bearing benzothiazole or benzoxazole-based pincer ligand. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.04.037] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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38
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Chergui M, Thomas JM. From structure to structural dynamics: Ahmed Zewail's legacy. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2017; 4:043802. [PMID: 28868324 PMCID: PMC5562505 DOI: 10.1063/1.4998243] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Accepted: 08/08/2017] [Indexed: 05/19/2023]
Abstract
In this brief tribute to Ahmed Zewail, we highlight and place in the historical context, several of the major achievements that he and his colleagues have made in Femtochemistry (of which he was the principal instigator) and his introduction of ultrafast electron scattering, diffraction, microscopy and spectroscopy. By achieving a sub-picosecond temporal resolution, coupled with a picometer spatial resolution, he revolutionised our understanding of the corpus of chemical, physical, biological and materials science systems.
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Affiliation(s)
- Majed Chergui
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide and Lausanne Centre for Ultrafast Science (LACUS), ISIC, Faculté des Sciences de Base, Station 6, CH-1015 Lausanne, Switzerland
| | - John Meurig Thomas
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB30FS, United Kingdom
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39
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Burn PL, Powell BJ. Effect of n-propyl substituents on the emission properties of blue phosphorescent iridium(iii) complexes. J Chem Phys 2017; 146:174305. [DOI: 10.1063/1.4981797] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Affiliation(s)
- Paul L. Burn
- Centre for Organic Photonics and Electronics, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Benjamin J. Powell
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia
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40
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Hierlinger C, Roisnel T, Cordes DB, Slawin AMZ, Jacquemin D, Guerchais V, Zysman-Colman E. An Unprecedented Family of Luminescent Iridium(III) Complexes Bearing a Six-Membered Chelated Tridentate C^N^C Ligand. Inorg Chem 2017; 56:5182-5188. [PMID: 28394570 PMCID: PMC5417592 DOI: 10.1021/acs.inorgchem.7b00328] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Indexed: 02/06/2023]
Abstract
A new family consisting of three luminescent neutral Ir(III) complexes with the unprecedented [Ir(C^N^C)(N^N)Cl] architecture, where C^N^C is a bis(six-membered) chelating tridentate tripod ligand derived from 2-benzhydrylpyridine (bnpy) and N^N is 4,4'-di-tert-butyl-2,2'-bipyridine (dtBubpy), is reported. X-ray crystallography reveals an unexpected and unusual double C-H bond activation of the two distal nonconjugated phenyl rings of the bnpy coupled with a very short Ir-Cl bond trans to the pyridine of the bnpy ligand. Depending on the substitution on the bnpy ligand, phosphorescence, ranging from yellow to red, is observed in dichloromethane solution. A combined study using density functional theory (DFT) and time-dependent DFT (TD-DFT) corroborates the mixed charge-transfer nature of the related excited states.
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Affiliation(s)
- Claus Hierlinger
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St. Andrews, St. Andrews, Fife, KY16 9ST, United Kingdom
| | - Thierry Roisnel
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - David B. Cordes
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St. Andrews, St. Andrews, Fife, KY16 9ST, United Kingdom
| | - Alexandra M. Z. Slawin
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St. Andrews, St. Andrews, Fife, KY16 9ST, United Kingdom
| | - Denis Jacquemin
- UMR CNRS 6230, Université de Nantes,
CEISAM, 2 rue de la Houssinière, 44322 Nantes Cedex 3, France
- Institut Universitaire de France, 1, Rue Descartes, 75005 Paris Cedex 5, France
| | - Véronique Guerchais
- Institut des Sciences
Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Eli Zysman-Colman
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St. Andrews, St. Andrews, Fife, KY16 9ST, United Kingdom
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41
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Cho YJ, Kim SY, Choi CM, Kim NJ, Kim CH, Cho DW, Son HJ, Pac C, Kang SO. Photophysics and Excited-State Properties of Cyclometalated Iridium(III)–Platinum(II) and Iridium(III)–Iridium(III) Bimetallic Complexes Bridged by Dipyridylpyrazine. Inorg Chem 2017; 56:5305-5315. [DOI: 10.1021/acs.inorgchem.7b00384] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yang-Jin Cho
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - So-Yoen Kim
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Chang Min Choi
- Department of Chemistry, Chungbuk National University, Chungbuk 28644, Korea
| | - Nam Joon Kim
- Department of Chemistry, Chungbuk National University, Chungbuk 28644, Korea
| | - Chul Hoon Kim
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Dae Won Cho
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Ho-Jin Son
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Chyongjin Pac
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
| | - Sang Ook Kang
- Department of Advanced Materials Chemistry, Korea University, Sejong 30019, Korea
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42
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Phosphorescent Neutral Iridium (III) Complexes for Organic Light-Emitting Diodes. Top Curr Chem (Cham) 2017; 375:39. [DOI: 10.1007/s41061-017-0126-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 02/22/2017] [Indexed: 11/26/2022]
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43
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Toda T, Saitoh K, Yoshinari A, Ikariya T, Kuwata S. Synthesis and Structures of NCN Pincer-Type Ruthenium and Iridium Complexes Bearing Protic Pyrazole Arms. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00065] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tatsuro Toda
- School
of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Koki Saitoh
- School
of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Akihiro Yoshinari
- School
of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Takao Ikariya
- School
of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Shigeki Kuwata
- School
of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
- PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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44
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Baiju TV, Namboothiri INN. Synthesis of Functionalized Pyrazoles via 1,3-Dipolar Cycloaddition of α-Diazo-β-ketophosphonates, Sufones and Esters with Electron-Deficient Alkenes. CHEM REC 2017; 17:939-955. [PMID: 28266174 DOI: 10.1002/tcr.201600141] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2016] [Indexed: 12/14/2022]
Abstract
1,3-Dipolar cycloaddition of diazo compounds with olefinic substrates is a promising atom-economic strategy for the construction of functionalized pyrazoles. Over the last few years, our group has been engaged in the synthesis of phosphonyl/sulfonylpyrazoles and pyrazole esters by employing Bestmann-Ohira Reagent (BOR) and its sulfur and ester analogs as 1,3-dipole precursors with various dipolarophiles. This account describes the novel synthetic methods developed in our laboratory, in the perspective of closely related work by others, for the synthesis of phosphonyl/sulfonylpyrazoles, pyrazole esters and the total synthesis of Withasomnine, a natural product, by using 1,3-dipolar cycloaddition as the key step.
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Affiliation(s)
- T V Baiju
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
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45
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Oshiyama T, Yasukawa N, Kita H, Matsui T, Sumita M, Morihashi K. A Theoretical Guideline for Designing Effective Host Materials Based on 4,4′-Bis(9-carbazolyl)-1,1′-biphenyl Derivatives for Blue Phosphorescent Devices. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20160345] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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46
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Govdi AI, Kulyashova AE, Vasilevsky SF, Balova IA. Functionalized buta-1,3-diynyl- N -methylpyrazoles by sequential “diacetylene zipper” and Sonogashira coupling reactions. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.01.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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47
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Zhang BH, Lei LS, Liu SZ, Mou XQ, Liu WT, Wang SH, Wang J, Bao W, Zhang K. Zinc-promoted cyclization of tosylhydrazones and 2-(dimethylamino)malononitrile: an efficient strategy for the synthesis of substituted 1-tosyl-1H-pyrazoles. Chem Commun (Camb) 2017; 53:8545-8548. [DOI: 10.1039/c7cc04610c] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient strategy for the synthesis of substituted 1-tosyl-1H-pyrazoles has been developed through a cyclization reaction of tosylhydrazones with 2-(dimethylamino)malononitrile.
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Affiliation(s)
- Bang-Hong Zhang
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Lin-Sheng Lei
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Si-Zhan Liu
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Xue-Qing Mou
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Wei-Ting Liu
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Shao-Hua Wang
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
- School of Chemical and Environmental Engineering
| | - Jie Wang
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Wen Bao
- School of Pharmacy
- Lanzhou University
- Lanzhou 730000
- P. R. China
| | - Kun Zhang
- School of Chemical and Environmental Engineering
- Wuyi University
- Jiangmen 529020
- P. R. China
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48
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Hisamatsu Y, Kumar S, Aoki S. Design and Synthesis of Tris-Heteroleptic Cyclometalated Iridium(III) Complexes Consisting of Three Different Nonsymmetric Ligands Based on Ligand-Selective Electrophilic Reactions via Interligand HOMO Hopping Phenomena. Inorg Chem 2016; 56:886-899. [DOI: 10.1021/acs.inorgchem.6b02519] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Yosuke Hisamatsu
- Faculty
of Pharmaceutical Sciences, ‡Division of Medical Science-Engineering
Cooperation, Research Institute for Science and Technology, and §Imaging Frontier
Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Sarvendra Kumar
- Faculty
of Pharmaceutical Sciences, ‡Division of Medical Science-Engineering
Cooperation, Research Institute for Science and Technology, and §Imaging Frontier
Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Shin Aoki
- Faculty
of Pharmaceutical Sciences, ‡Division of Medical Science-Engineering
Cooperation, Research Institute for Science and Technology, and §Imaging Frontier
Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
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49
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Axtell JC, Kirlikovali KO, Djurovich PI, Jung D, Nguyen VT, Munekiyo B, Royappa AT, Rheingold AL, Spokoyny AM. Blue Phosphorescent Zwitterionic Iridium(III) Complexes Featuring Weakly Coordinating nido-Carborane-Based Ligands. J Am Chem Soc 2016; 138:15758-15765. [PMID: 27934013 DOI: 10.1021/jacs.6b10232] [Citation(s) in RCA: 137] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We report the development of a new class of phosphorescent zwitterionic bis(heteroleptic) Ir(III) compounds containing pyridyl ligands with weakly coordinating nido-carboranyl substituents. Treatment of phenylpyridine-based Ir(III) precursors with C-substituted ortho-carboranylpyridines in 2-ethoxyethanol results in a facile carborane deboronation and the formation of robust and highly luminescent metal complexes. The resulting nido-carboranyl fragments associate with the cationic Ir(III) center through primarily electrostatic interactions. These compounds phosphoresce at blue wavelengths (450-470 nm) both in a poly(methyl methacrylate) (PMMA) matrix and in solution at 77 K. These complexes display structural stability at temperatures beyond 300 °C and quantum yields greater than 40%. Importantly, the observed quantum yields correspond to a dramatic 10-fold enhancement over the previously reported Ir(III) congeners featuring carboranyl-containing ligands in which the boron cluster is covalently attached to the metal. Ultimately, this work suggests that the use of a ligand framework containing a weakly coordinating anionic component can provide a new avenue for designing efficient Ir(III)-based phosphorescent emitters.
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Affiliation(s)
- Jonathan C Axtell
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Kent O Kirlikovali
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Peter I Djurovich
- Department of Chemistry, University of Southern California , Los Angeles, California 90089, United States
| | - Dahee Jung
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Vinh T Nguyen
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Brian Munekiyo
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - A Timothy Royappa
- Department of Chemistry, University of California, San Diego , 9500 Gilman Drive, La Jolla, California 92093, United States.,Department of Chemistry, University of West Florida , 11000 University Parkway, Pensacola, Florida 32514, United States
| | - Arnold L Rheingold
- Department of Chemistry, University of California, San Diego , 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Alexander M Spokoyny
- Department of Chemistry and Biochemistry, University of California, Los Angeles , 607 Charles E. Young Drive East, Los Angeles, California 90095, United States.,California NanoSystems Institute (CNSI), University of California, Los Angeles , 570 Westwood Plaza, Los Angeles, California 90095, United States
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50
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Kimoto K, Satoh T, Iwamura M, Nozaki K, Horikoshi T, Suzuki S, Kozaki M, Okada K. Very Long-Lived Photoinduced Charge-Separated States of Triphenylamine–Naphthalenediimide Dyads in Polymer Matrices. J Phys Chem A 2016; 120:8093-8103. [DOI: 10.1021/acs.jpca.6b07705] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kenshi Kimoto
- Department
of Chemistry, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Tsubasa Satoh
- Department
of Chemistry, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Munetaka Iwamura
- Department
of Chemistry, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Koichi Nozaki
- Department
of Chemistry, Graduate School of Science and Engineering, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Takafumi Horikoshi
- Department
of Chemistry, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Shuichi Suzuki
- Department
of Chemistry, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Masatoshi Kozaki
- Department
of Chemistry, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Keiji Okada
- Department
of Chemistry, Graduate School of Science, Osaka City University, Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
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