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Kim H, Cho D, Kim H, Kim SC, Lee JY, Kang Y. Development of Blue Phosphorescent Pt(II) Materials Using Dibenzofuranyl Imidazole Ligands and Their Application in Organic Light-Emitting Diodes. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16114159. [PMID: 37297296 DOI: 10.3390/ma16114159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 05/26/2023] [Accepted: 06/01/2023] [Indexed: 06/12/2023]
Abstract
Organic light-emitting diodes (OLEDs) are energy-efficient; however, the coordinating ligand can affect their stability. Sky-blue phosphorescent Pt(II) compounds with a C^N chelate, fluorinated-dbi (dbi = [1-(2,4-diisopropyldibenzo [b,d]furan-3-yl)-2-phenyl-1H-imidazole]), and acetylactonate (acac) (1)/picolinate (pic) (2) ancillary ligands were synthesized. The molecular structures were characterized using various spectroscopic methods. The Pt(II) Compound Two exhibited a distorted square planar geometry, with several intra- and inter-molecular interactions involving Cπ⋯H/Cπ⋯Cπ stacking. Complex One emitted bright sky-blue light (λmax = 485 nm) with a moderate photoluminescent quantum efficiency (PLQY) of 0.37 and short decay time (6.1 µs) compared to those of 2. Theoretical calculations suggested that the electronic transition of 1 arose from ligand(C^N)-centered π-π* transitions combined with metal-to-ligand charge-transfer (MLCT), whereas that of 2 arose from MLCT and ligand(C^N)-to-ligand(pic) charge-transfer (LLCT), with minimal contribution from C^N chelate to the lowest unoccupied molecular orbital (LUMO). Multi-layered phosphorescent OLEDs using One as a dopant and a mixed host, mCBP/CNmCBPCN, were successfully fabricated. At a 10% doping concentration of 1, a current efficiency of 13.6 cdA-1 and external quantum efficiency of 8.4% at 100 cdm-2 were achieved. These results show that the ancillary ligand in phosphorescent Pt(II) complexes must be considered.
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Affiliation(s)
- Hakjo Kim
- Division of Science Education, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Dain Cho
- Division of Science Education, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Haein Kim
- Division of Science Education, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Seung Chan Kim
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Jun Yeob Lee
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Youngjin Kang
- Division of Science Education, Kangwon National University, Chuncheon 24341, Republic of Korea
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2
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Takaki K, Sakuda E, Ito A, Horiuchi S, Arikawa Y, Umakoshi K. Bridging-arylene effects on spectroscopic and photophysical properties of arylborane–dipyrrinato zinc( ii) complexes. RSC Adv 2021; 11:6259-6267. [PMID: 35423129 PMCID: PMC8694852 DOI: 10.1039/d0ra09029h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 01/23/2021] [Indexed: 11/23/2022] Open
Abstract
Novel bis(dipyrrinato)zinc(ii) derivatives having 4-[bis(2,4,6-trimethylphenyl)boryl]phenyl (ZnBph) or 4-[bis(2,4,6-trimethylphenyl)boryl]-2,3,5,6-tetramethylphenyl groups (ZnBdu) at the 5-position of the dipyrrinato ligands were designed and synthesized. In ZnBph with the smaller dipyrrinate–arylene and arylene–dimesitylboryl dihedral angles, an intramolecular charge transfer arising from the presence of the vacant p orbital on the boron atom participates in the ππ* excited state in character in contrast to the pure ππ* excited state of ZnBdu. The synergistic ππ*/ILCT excited state was weakly fluorescent, and the fluorescence was enhanced upon binding of fluoride to the boron atom. Electronic interactions between a bis(dipyrrinato)zinc(ii) and arylborane moieties were successfully tuned by a structure of bridging arylene groups. The excited state of a phenylene bridged complex was best characterized by the synergistic ππ*/ILCT.![]()
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Affiliation(s)
- Koyo Takaki
- Division of Chemistry and Materials Science
- Graduate School of Engineering
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Eri Sakuda
- Division of Chemistry and Materials Science
- Graduate School of Engineering
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Akitaka Ito
- Graduate School of Engineering
- Kochi University of Technology
- Kochi 782-8502
- Japan
| | - Shinnosuke Horiuchi
- Division of Chemistry and Materials Science
- Graduate School of Engineering
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Yasuhiro Arikawa
- Division of Chemistry and Materials Science
- Graduate School of Engineering
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Keisuke Umakoshi
- Division of Chemistry and Materials Science
- Graduate School of Engineering
- Nagasaki University
- Nagasaki 852-8521
- Japan
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Avinash I, Parveen S, Anantharaman G. Backbone Boron-Functionalized Imidazoles/Imidazolium Salts: Synthesis, Structure, Metalation Studies, and Fluoride Sensing Properties. Inorg Chem 2020; 59:5646-5661. [DOI: 10.1021/acs.inorgchem.0c00348] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Iruthayaraj Avinash
- Department of Chemistry, Indian Institute of Technology, Kanpur, Uttar Pradesh 208016, India
| | - Sabeeha Parveen
- Department of Chemistry, Indian Institute of Technology, Kanpur, Uttar Pradesh 208016, India
| | - Ganapathi Anantharaman
- Department of Chemistry, Indian Institute of Technology, Kanpur, Uttar Pradesh 208016, India
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Aradhyula BPR, Ranga Naidu Chinta RV, Dhanunjayarao K, Venkatasubbaiah K. Synthesis and characterization of poly(tetraphenylimidazole)s and their application in the detection of fluoride ions. RSC Adv 2020; 10:13149-13154. [PMID: 35492134 PMCID: PMC9051455 DOI: 10.1039/d0ra01559h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 03/24/2020] [Indexed: 11/21/2022] Open
Abstract
Here, we describe the synthesis and characterization of a silyl protected tetraphenylimidazole monomer and its homo and co-polymer. The requisite monomer was accessed by Suzuki–Miyaura cross-coupling of 2-(1-(4-bromophenyl)-4,5-diphenyl-1H-imidazol-2-yl)phenol and 4-vinylphenylboronic acid followed by protection of the phenolic group by tert-butyl(chloro)diphenylsilane. The desired polymers were readily synthesized by using free radical polymerization. Both the polymers and monomer were characterized using different analytical techniques including multinuclear NMR, GPC (for polymers), and single crystal X-ray crystallography (for the monomer). By utilizing the greater fluorophilicity of the silyl atom, the polymers were studied as probes for the detection of fluoride ions. The selectivity and sensitivity of the synthesized polymers were investigated in detail. We describe the synthesis and characterization of a silyl protected tetraphenylimidazole monomer and its polymers. The polymers were studied as probes for the detection of fluoride ions. Both the probes showed high selectivity and sensitivity over other ions tested.![]()
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Affiliation(s)
- Basava Punna Rao Aradhyula
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar-752050
- India
| | - Ramu V. Ranga Naidu Chinta
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar-752050
- India
| | - Kunchala Dhanunjayarao
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar-752050
- India
| | - Krishnan Venkatasubbaiah
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar-752050
- India
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Amarne H, Helal W, Wang S. Synthesis, structure and density functional theory calculations of a novel photoluminescent trisarylborane-bismuth(III) complex. LUMINESCENCE 2019; 34:731-738. [PMID: 31251465 DOI: 10.1002/bio.3667] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 05/12/2019] [Accepted: 05/28/2019] [Indexed: 11/09/2022]
Abstract
A novel trisarylborane-Bi(III) complex, tris(4-(dimesitylboryl)phenyl)bismuthine [Bi(PhBMes2 )3 ], in which (Ph = phenyl, and Mes = mesityl), was synthesized via the reaction of bismuth (III) chloride (BiCl3 ) with three equivalents of lithiated (4-bromophenyl)- dimesitylborane [BrPhBMes2 ]. The new trisarylbismuthine was characterized by elemental analysis, ultraviolet-visible (UV-vis) spectroscopy, and NMR (1 H and 13 C) spectroscopy. The molecular structure of Bi(PhBMes2 )3 in the solid state was determined using single-crystal X-ray diffraction analysis, which showed short intermolecular C-H···H-C contact. The complex is a fluorescent emitter (λmax = 395 nm) at room temperature and a phosphorescent emitter (λmax = 423 nm) at 77 K, which displayed a long lifetime of 495 ms. The UV-vis transitions were investigated using density function theory (DFT) and time-dependent (TD)-DFT calculations. Natural bond orbital analysis showed that the bismuth (III) center was mainly Lewis acidic in nature.
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Affiliation(s)
- Hazem Amarne
- Department of Chemistry, The University of Jordan, Amman, Jordan
| | - Wissam Helal
- Department of Chemistry, The University of Jordan, Amman, Jordan
| | - Suning Wang
- Department of Chemistry, Queen's University, Kingston, Ontario, Canada
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Wang X, Wang S. Phosphorescent Pt(II) Emitters for OLEDs: From Triarylboron‐Functionalized Bidentate Complexes to Compounds with Macrocyclic Chelating Ligands. CHEM REC 2019; 19:1693-1709. [DOI: 10.1002/tcr.201800165] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 12/10/2018] [Indexed: 02/02/2023]
Affiliation(s)
- Xiang Wang
- Department of ChemistryQueen's University Kingston, Ontario K7L 3N6 Canada
| | - Suning Wang
- Department of ChemistryQueen's University Kingston, Ontario K7L 3N6 Canada
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Nakagawa A, Ito A, Sakuda E, Fujii S, Kitamura N. Emission Tuning of Heteroleptic Arylborane–Ruthenium(II) Complexes by Ancillary Ligands: Observation of Strickler–Berg-Type Relation. Inorg Chem 2018; 57:9055-9066. [DOI: 10.1021/acs.inorgchem.8b01058] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Akitaka Ito
- Graduate School of Engineering/School of Environmental Science and Engineering, Kochi University of Technology, 185 Miyanokuchi, Tosayamada, Kami, Kochi 782-8502, Japan
| | - Eri Sakuda
- Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University, Bunkyo-machi, Nagasaki 852-8521, Japan
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Leopold H, Strassner T. 4,5-Substituted C^C* cyclometalated thiazol-2-ylidene platinum(ii) complexes - synthesis and photophysical properties. Dalton Trans 2018; 46:7800-7812. [PMID: 28590491 DOI: 10.1039/c7dt00828g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We report the synthesis of seven novel backbone functionalized N-phenyl-1,3-thiazol-2-ylidene platinum(ii) complexes and their photophysical properties. Electronically diverse N-phenyl-1,3-thiazol-2-thiones were prepared by a reaction of aniline with carbon disulfide and different α-haloketone compounds. Oxidative desulfuration and salt metathesis yielded the desired NHC-precursors with hexafluorophosphate counterions. In addition, a new route for the synthesis of N-phenyl-1,3-benzo[d]thiazole tetrafluoroborate via N-arylation using hypervalent iodine species is presented. All complexes were prepared from the corresponding NHC precursor in a one-pot process using silver(i)oxide, transmetalation to platinum and reaction with the β-diketone acetylacetone under basic conditions. These complexes exhibit strong phosphorescence with quantum yields up to 72% in 2 wt% PMMA films with decay lifetimes of 8.8-12.3 μs. The influence of methyl- and phenyl-groups, and an ester-substituent at the 4- and/or 5-position of the 1,3-thiazole moiety, as well as the N-phenyl-1,3-benzo[d]thiazole-derived motif is discussed. The 4,5-unsubstituted-N-phenyl-1,3-thiazol-2-ylidene platinum(ii) acetylacetonato complex served as a reference in this study to evaluate the electronic effects originating from the backbone substitution. All complexes emit in a narrow range of the bluish-green spectrum of the visible light (510 ± 10 nm).
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Affiliation(s)
- Hendrik Leopold
- Physikalische Organische Chemie, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany.
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9
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Brahim H, Haddad B, Brahim S, Guendouzi A. DFT/TDDFT computational study of the structural, electronic and optical properties of rhodium (III) and iridium (III) complexes based on tris-picolinate bidentate ligands. J Mol Model 2017; 23:344. [PMID: 29147775 DOI: 10.1007/s00894-017-3517-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 11/02/2017] [Indexed: 11/30/2022]
Abstract
The electronic structures and spectroscopic properties of two complexes [M(pic)3] (M = Ir, Rh) containing picolinate as bidentate ligands have been calculated by means density functional theory (DFT) and time-dependent DFT/TD-DFT using three hybrid functionals B3LYP, PBE0 and mPW1PW91. The PBE0 and mPW1PW91 functionals, which have the same HF exchange fraction (25%), give similar results and do not differ drastically from B3LYP results. Calculated geometric parameters of the complexes are in good agreement with the available experimental data. The UV absorptions observed in acetonitrile were assigned on the basis of singlet state transitions. The most intense band observed in the UV-C region corresponds to ligand-to-ligand charge transfer states (LLCT) in both complexes. The theoretical spectrum of the rhodium complex is characterized by a large degree of mixing between metal-to-ligand-charge-transfer (MLCT), LLCT and metal centered (MC) states in the UV-A region. The presence of low-lying excited states with MC character affects the absorption spectrum under spin-orbit coupling (SOC) effects and play important roles in the photochemical properties. Graphical abstract Frontier molecular orbital diagram of mer-M(pic)3 (M=Ir, Rh).
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Affiliation(s)
- Houari Brahim
- Department of Chemistry, Dr Moulay Tahar University of Saida, 20000, Saida, Algeria.
| | - Boumediene Haddad
- Department of Chemistry, Dr Moulay Tahar University of Saida, 20000, Saida, Algeria
| | - Sefia Brahim
- Department of Chemistry, Dr Moulay Tahar University of Saida, 20000, Saida, Algeria
| | - Abdelkrim Guendouzi
- Department of Chemistry, Dr Moulay Tahar University of Saida, 20000, Saida, Algeria
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Nghia NV, Oh J, Jung J, Lee MH. Deboronation-Induced Turn-on Phosphorescent Sensing of Fluorides by Iridium(III) Cyclometalates with o-Carborane. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00139] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nguyen Van Nghia
- Department of Chemistry and
EHSRC, University of Ulsan, Ulsan 44610, Republic of Korea
| | - Jihun Oh
- Department of Chemistry and
EHSRC, University of Ulsan, Ulsan 44610, Republic of Korea
| | - Jaehoon Jung
- Department of Chemistry and
EHSRC, University of Ulsan, Ulsan 44610, Republic of Korea
| | - Min Hyung Lee
- Department of Chemistry and
EHSRC, University of Ulsan, Ulsan 44610, Republic of Korea
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11
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Fan HW, Bai FQ, Zhang ZX, Wang Y, Qu ZX, Zhong RL, Zhang HX. Theoretical investigation on the effect of ancillary ligand modification for highly efficient phosphorescent platinum(ii) complex design. RSC Adv 2017. [DOI: 10.1039/c7ra00705a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Reasonable modification of ancillary ligands for Pt(ii) complexes can effectively improve the quantum efficiency and strengthen the rigidity of luminescent materials in organic light-emitting diodes.
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Affiliation(s)
- Hong-Wei Fan
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry
- Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
| | - Fu-Quan Bai
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry
- Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
| | - Zhi-Xiang Zhang
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry
- Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
| | - Yu Wang
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry
- Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
| | - Ze-Xing Qu
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry
- Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
| | - Rong-Lin Zhong
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry
- Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
| | - Hong-Xing Zhang
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry
- Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun 130023
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12
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The influence of ancillary ligands on the antitumoral activity of new cyclometallated Pt(II) complexes derived from an ferrocene-pyrazole hybrid. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.11.031] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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13
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Leopold H, Heinemeyer U, Wagenblast G, Münster I, Strassner T. Changing the Emission Properties of Phosphorescent C^C*-Cyclometalated Thiazol-2-ylidene Platinum(II) Complexes by Variation of the β-Diketonate Ligands. Chemistry 2016; 23:1118-1128. [PMID: 27859741 DOI: 10.1002/chem.201604456] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Indexed: 11/08/2022]
Abstract
Cyclometalated thiazol-2-ylidene platinum(II) complexes based on the N-phenyl-4,5-dimethyl-1,3-thiazol-2-ylidene N-heterocyclic carbene (NHC) ligand and seven different β-diketonate ligands have been synthesised and investigated for their structural and photophysical properties. The complexes were synthesised in a one-pot procedure starting with the in situ formation of the corresponding silver(I) carbene and transmetalation to platinum, followed by the reaction with the respective β-diketonate under basic conditions. All the compounds were fully characterised by standard techniques, including 195 Pt NMR spectroscopy. Three solid-state structures revealed quite different aggregation behaviour depending on the β-diketonate architecture. The reported complexes showed strong phosphorescence at room temperature in amorphous poly(methyl methacrylate) films. The emission wavelengths (ca. 510 nm) were found to be independent of the β-diketonate ligand, but the electronically diverse β-diketonates strongly influence the observed quantum yields (QY) and decay lifetimes. The results of theoretical studies employing density functional theory (DFT) methods support the conclusion of a metal-to-ligand charge transfer (3 MLCT) as the main emission process, in accordance with the reported photophysical properties. Standard organic light-emitting diodes (OLEDs) prepared with unoptimised matrix materials using one of the complexes showed values of 12.3 % external quantum yield, 24.0 lm W-1 luminous efficacy and 37.8 cd A-1 current efficiency at 300 cd m-2 .
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Affiliation(s)
- Hendrik Leopold
- Physikalische Organische Chemie, Technische Universität Dresden, 01069, Dresden, Germany
| | | | | | | | - Thomas Strassner
- Physikalische Organische Chemie, Technische Universität Dresden, 01069, Dresden, Germany
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Du J, Luo Y, Xie X, Hu W, Shen W. Tuning the electronic and photophysical properties of platinum(II) complexes through ancillary ligand modification: a theoretical study. MOLECULAR SIMULATION 2016. [DOI: 10.1080/08927022.2016.1168523] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Junhong Du
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, P.R. China
| | - Yafei Luo
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, P.R. China
| | - Xiaohua Xie
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, P.R. China
| | - Wuhong Hu
- School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing, P.R. China
| | - Wei Shen
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing, P.R. China
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15
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Omae I. Application of the five-membered ring blue light-emitting iridium products of cyclometalation reactions as OLEDs. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.08.009] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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16
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Kumar GR, Sarkar SK, Thilagar P. Triarylborane conjugated dicyanovinyl chromophores: intriguing optical properties and colorimetric anion discrimination. Phys Chem Chem Phys 2015; 17:30424-32. [PMID: 26509424 DOI: 10.1039/c5cp05378a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Three new triarylborane conjugated dicyanovinyl chromophores (Mes2B-π-donor-DCV); donor: N-methyldiphenylamine () and triphenylamine ( and [with two BMes2 substitutions]) of type A-D-A (acceptor-donor-acceptor) are reported. Compounds exhibit intense charge transfer (CT) absorption bands in the visible region. These absorption peaks are combination CT bands of the amine donor to both the BMes2 and DCV units. This inference was supported by theoretical studies. Compound shows weak fluorescence compared to and . The discrimination of fluoride and cyanide ions is essential in the case of triarylborane (TAB) based anion sensors as a similar response is given towards both the anions. Anion binding studies of , and showed that fluoride ions bind selectively to the boron centre and block the corresponding CT transition (donor to BMes2) leaving the other CT transition to be red shifted. On the other hand, cyanide ions bind with both the receptor sites and stop both the CT transition processes and hence a different colorimetric response was noted. The binding of F(-)/CN(-) induces colour changes in the visible region of the electronic spectra of and , which allows for the naked-eye detection of F(-) and CN(-) ions. The anion binding mechanisms are established using NMR titration experiments.
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Affiliation(s)
- George Rajendra Kumar
- Inorganic and Physical Chemistry Department, Indian Institute of Science, Bangalore-560012, India.
| | - Samir Kumar Sarkar
- Inorganic and Physical Chemistry Department, Indian Institute of Science, Bangalore-560012, India.
| | - Pakkirisamy Thilagar
- Inorganic and Physical Chemistry Department, Indian Institute of Science, Bangalore-560012, India.
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17
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Moussa J, Freeman GR, Williams JAG, Chamoreau LM, Herson P, Amouri H. Synthesis and Luminescence Properties of Cycloplatinated Complexes with a Chelating N∧C Pyridine-Derived N-Heterocyclic Carbene - Influence of 2,4,6-Triphenylphosphinine versus Triphenylphosphine. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500879] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Kwak J, Nghia NV, Lee J, Kim H, Park MH, Lee MH. Lewis acidity enhancement of triarylborane by appended phosphine oxide groups. Dalton Trans 2015; 44:4765-72. [PMID: 25668014 DOI: 10.1039/c5dt00042d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of mono-, di-, and tri-phosphine oxide substituted triarylboranes, Mes2BAr (1), MesBAr2 (2), and BAr3 (3) (Ar = 4-(Ph2PO)-2,6-Me2-C6H2) were prepared to investigate the effect of a phosphine oxide group (Ph2PO) on Lewis acidity enhancement of triarylboranes. The X-ray crystal structure of 3 revealed peripheral decoration of Ph2PO groups with a C3-axis perpendicular to the trigonal boron center. UV/Vis absorption and PL spectra indicated a significant contribution of π(Mes or phenylene) → pπ(B) charge transfer in the lower-energy electronic transition. The reduction potential measured by cyclic voltammetry showed apparent LUMO stabilization by introduction of phosphine oxide groups, the extent of which gradually increased with the increasing number of phosphine oxide groups. Lewis acidity enhancement was also supported by the gradual increase in fluoride ion affinity in the order 3 > 2 > 1. Theoretical calculations suggest that introduction of a Ph2PO group into a triarylborane significantly enhances the Lewis acidity of the boron center via an inductive electron-withdrawing effect and this effect is additive for multiple phosphine oxide groups.
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Affiliation(s)
- Jaewoo Kwak
- Department of Chemistry Education, Chungbuk National University, Cheongju 361-763, Republic of Korea.
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Tian L, Luo Y, Zhang L, Li M, He R, Shen W. Theoretical Insight Into the Role of Triarylboron Substituents in Tetradentate Dianionic Bis(N‐heterocyclic carbene) Platinum(II) Chelates – Improving the Performance of Blue Light Emission. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201403092] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Li Tian
- School of Chemistry and Chemical Engineering, Southwest University, No. 2 Tiansheng Road, BeiBei District, Chongqing 400715,P.R.China, http://chemistry.swu.edu.cn/
| | - Yafei Luo
- School of Chemistry and Chemical Engineering, Southwest University, No. 2 Tiansheng Road, BeiBei District, Chongqing 400715,P.R.China, http://chemistry.swu.edu.cn/
| | - Luqiong Zhang
- School of Chemistry and Chemical Engineering, Southwest University, No. 2 Tiansheng Road, BeiBei District, Chongqing 400715,P.R.China, http://chemistry.swu.edu.cn/
| | - Ming Li
- School of Chemistry and Chemical Engineering, Southwest University, No. 2 Tiansheng Road, BeiBei District, Chongqing 400715,P.R.China, http://chemistry.swu.edu.cn/
| | - Rongxing He
- School of Chemistry and Chemical Engineering, Southwest University, No. 2 Tiansheng Road, BeiBei District, Chongqing 400715,P.R.China, http://chemistry.swu.edu.cn/
| | - Wei Shen
- School of Chemistry and Chemical Engineering, Southwest University, No. 2 Tiansheng Road, BeiBei District, Chongqing 400715,P.R.China, http://chemistry.swu.edu.cn/
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20
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Triarylboron-Functionalized Metal Complexes for OLEDs. GREEN CHEMISTRY AND SUSTAINABLE TECHNOLOGY 2015. [DOI: 10.1007/978-3-662-46054-2_8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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21
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Ko SB, Park HJ, Gong S, Wang X, Lu ZH, Wang S. Blue phosphorescent N-heterocyclic carbene chelated Pt(ii) complexes with an α-duryl-β-diketonato ancillary ligand. Dalton Trans 2015; 44:8433-43. [DOI: 10.1039/c4dt03085k] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Blue phosphorescent Pt(ii) complexes that display bright blue emission in the solid state have been obtained employing NHC-based C∧C*-chelate ligands and an α-duryl-β-diketonato ancillary ligand that provides steric blocking to minimize intermolecular interactions.
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Affiliation(s)
- Soo-Byung Ko
- Department of Chemistry
- Queen's University
- Kingston
- Canada
| | - Hee-Jun Park
- Department of Chemistry
- Queen's University
- Kingston
- Canada
| | - Shaolong Gong
- Department of Materials Science and Engineering
- University of Toronto
- Toronto
- Canada
| | - Xiang Wang
- Department of Chemistry
- Queen's University
- Kingston
- Canada
| | - Zheng-Hong Lu
- Department of Materials Science and Engineering
- University of Toronto
- Toronto
- Canada
| | - Suning Wang
- Department of Chemistry
- Queen's University
- Kingston
- Canada
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22
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Sung WY, Lee J, Lee MH. Triarylborane Lewis acids with indole or phenol group: B/H hybrid receptors for fluoride. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Zhang Z, Edkins RM, Nitsch J, Fucke K, Eichhorn A, Steffen A, Wang Y, Marder TB. D-π-A triarylboron compounds with tunable push-pull character achieved by modification of both the donor and acceptor moieties. Chemistry 2014; 21:177-90. [PMID: 25413782 DOI: 10.1002/chem.201405621] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Indexed: 11/07/2022]
Abstract
The push-pull character of a series of donor-bithienyl-acceptor compounds has been tuned by adopting triphenylamine or 1,1,7,7-tetramethyljulolidine as a donor and B(2,6-Me2 -4-RC6 H2)2 (R=Me, C6 F5 or 3,5-(CF3)2 C6 H3) or B[2,4,6-(CF3 )3 C6 H2]2 as an acceptor. Ir-catalyzed C-H borylation was utilized in the derivatization of the boryl acceptors and the tetramethyljulolidine donor. The donor and acceptor strengths were evaluated by electrochemical and photophysical measurements. In solution, the compound with the strongest acceptor, B[2,4,6-(CF3)3 C6 H2]2 ((FMes)2 B), has strongly quenched emission, while all other compounds show efficient green to red (ΦF =0.80-1.00) or near-IR (NIR; ΦF =0.27-0.48) emission, depending on solvent. Notably, this study presents the first examples of efficient NIR emission from three-coordinate boron compounds. Efficient solid-state red emission was observed for some derivatives, and interesting aggregation-induced emission of the (FMes)2 B-containing compound was studied. Moreover, each compound showed a strong and clearly visible response to fluoride addition, with either a large emission-color change or turn-on fluorescence.
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Affiliation(s)
- Zuolun Zhang
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg (Germany)
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24
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Zhang Z, Edkins RM, Nitsch J, Fucke K, Steffen A, Longobardi LE, Stephan DW, Lambert C, Marder TB. Optical and electronic properties of air-stable organoboron compounds with strongly electron-accepting bis(fluoromesityl)boryl groups. Chem Sci 2014; 6:308-321. [PMID: 28966759 PMCID: PMC5586071 DOI: 10.1039/c4sc02410a] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 10/01/2014] [Indexed: 12/21/2022] Open
Abstract
R–Ph–B(FMes)2 compounds exhibit low reduction potentials, bright emission, a TICT state and unusual long-lived phosphorescence at low temperature.
Three compounds with phenyl (1), 4-tert-butylphenyl (2) and 4-N,N-diphenylaminophenyl (3) groups attached to bis(fluoromesityl)boryl ((FMes)2B) through B–C bonds have been prepared. The restricted rotation about the B–C bonds of boron-bonded aryl rings in solution has been studied by variable-temperature 19F NMR spectroscopy, and through-space F–F coupling has been observed for 3 at low temperature. Steric congestion inhibits binding of 1 by Lewis bases DABCO and tBu3P and the activation of H2 in their presence. Photophysical and electrochemical studies have been carried out on 2, 3, and an analogue of 3 containing a bis(mesityl)boryl ((Mes)2B) group, namely 4. Both 2 and 3 show bright emission in nonpolar solvents and in the solid-state, very strong electron-accepting ability as measured by cyclic voltammetry, and good air-stability. In addition, 2 displayed unusually long-lived emission (τ = 2.47 s) in 2-MeTHF at 77 K. The much stronger acceptor strength of (FMes)2B than (Mes)2B leads to significantly red-shifted emission in solution and the solid state, stronger emission solvatochromism, and significantly lower reduction potentials. Theoretical calculations confirm that 2 and 3 tend to form highly twisted excited states with good conjugation between one FMes group and the boron atom, which correlate well with their blue-shifted solid-state emissions and low kr values in solution.
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Affiliation(s)
- Zuolun Zhang
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Robert M Edkins
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Jörn Nitsch
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Katharina Fucke
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany . .,School of Medicine , Pharmacy and Health , Durham University , University Boulevard , Stockton-on-Tees , TS17 6BH , UK
| | - Andreas Steffen
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
| | - Lauren E Longobardi
- Department of Chemistry , University of Toronto , 80 St. George St. , Toronto , Ontario M5S 3H6 , Canada
| | - Douglas W Stephan
- Department of Chemistry , University of Toronto , 80 St. George St. , Toronto , Ontario M5S 3H6 , Canada
| | - Christoph Lambert
- Institut für Organische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany
| | - Todd B Marder
- Institut für Anorganische Chemie , Julius-Maximilians-Universität Würzburg , Am Hubland , 97074 Würzburg , Germany .
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25
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Sharma S, Kim H, Lee YH, Kim T, Lee YS, Lee MH. Heteroleptic Cyclometalated Iridium(III) Complexes Supported by Triarylborylpicolinate Ligand: Ratiometric Turn-On Phosphorescence Response upon Fluoride Binding. Inorg Chem 2014; 53:8672-80. [DOI: 10.1021/ic501286m] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Sanjeev Sharma
- Department of Chemistry
and EHSRC, University of Ulsan, Ulsan 680-749, Republic of Korea
| | - Hyungjun Kim
- Department of Chemistry, KAIST, Daejeon 305-701, Republic of Korea
| | - Young Hoon Lee
- Department of Chemistry
and EHSRC, University of Ulsan, Ulsan 680-749, Republic of Korea
| | - Taewon Kim
- Department of Chemistry
and EHSRC, University of Ulsan, Ulsan 680-749, Republic of Korea
| | - Yoon Sup Lee
- Department of Chemistry, KAIST, Daejeon 305-701, Republic of Korea
| | - Min Hyung Lee
- Department of Chemistry
and EHSRC, University of Ulsan, Ulsan 680-749, Republic of Korea
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26
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Lee YH, Nghia NV, Go MJ, Lee J, Lee SU, Lee MH. Terpyridine–Triarylborane Conjugates for the Dual Complexation of Zinc(II) Cation and Fluoride Anion. Organometallics 2014. [DOI: 10.1021/om401151p] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Young Hoon Lee
- Department of Chemistry and EHSRC, University of Ulsan, Ulsan 680-749, Republic of Korea
| | - Nguyen Van Nghia
- Department of Chemistry and EHSRC, University of Ulsan, Ulsan 680-749, Republic of Korea
| | - Min Jeong Go
- Department of Chemistry, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Junseong Lee
- Department of Chemistry, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Sang Uck Lee
- Department of Chemistry and EHSRC, University of Ulsan, Ulsan 680-749, Republic of Korea
| | - Min Hyung Lee
- Department of Chemistry and EHSRC, University of Ulsan, Ulsan 680-749, Republic of Korea
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27
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Zhang L, Tian L, Li M, He R, Shen W. A theoretical study on tuning the electronic structures and photophysical properties of newly designed platinum(ii) complexes by adding substituents on functionalized ligands as highly efficient OLED emitters. Dalton Trans 2014; 43:6500-12. [DOI: 10.1039/c3dt53209g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Adding strong π-accepting and electron-donating groups could stabilize MLCT and improve the photophysical properties in platinum(ii) complexes.
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Affiliation(s)
- Luqiong Zhang
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing, China
| | - Li Tian
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing, China
| | - Ming Li
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing, China
| | - Rongxing He
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing, China
| | - Wei Shen
- School of Chemistry and Chemical Engineering
- Southwest University
- Chongqing, China
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28
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Moussa J, Cheminel T, Freeman GR, Chamoreau LM, Williams JAG, Amouri H. An unprecedented cyclometallated platinum(ii) complex incorporating a phosphinine co-ligand: synthesis and photoluminescence behaviour. Dalton Trans 2014; 43:8162-5. [DOI: 10.1039/c4dt00589a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first luminescent platinum(ii) complex bearing phosphinine co-ligands with a long-lived emission from a phosphinine-localised triplet excited state is reported.
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Affiliation(s)
- Jamal Moussa
- UPMC Université Paris 06
- Institut Parisien de Chimie Moléculaire (UMR 8232)
- 75252 Paris Cedex 05, France
| | - Thomas Cheminel
- UPMC Université Paris 06
- Institut Parisien de Chimie Moléculaire (UMR 8232)
- 75252 Paris Cedex 05, France
| | | | - Lise-Marie Chamoreau
- UPMC Université Paris 06
- Institut Parisien de Chimie Moléculaire (UMR 8232)
- 75252 Paris Cedex 05, France
| | | | - Hani Amouri
- UPMC Université Paris 06
- Institut Parisien de Chimie Moléculaire (UMR 8232)
- 75252 Paris Cedex 05, France
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29
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Abstract
Metal-chelation and internal H bonds have been found to greatly enhance the photoelimination quantum efficiency of B,N-heterocycles by 2 orders of magnitude. Green phosphorescent Pt(II)-functionalized 1,2-azaborines have been achieved via photoelimination. A mechanistic pathway for the PE reaction has been established.
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Affiliation(s)
- Soo-Byung Ko
- Department of Chemistry, Queen's University , Kingston, Ontario K7L 3N6, Canada
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30
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Raoof F, Esmaeilbeig AR, Nabavizadeh SM, Niroomand Hosseini F, Kubicki M. Bridging and Chelating Roles of Bis(2-(diphenylphosphino)ethyl)phenylphosphine in Stabilizing Binuclear Platinum(II) Complexes. Organometallics 2013. [DOI: 10.1021/om400322s] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Fatemeh Raoof
- Department of Chemistry, College
of Sciences, Shiraz University, Shiraz
71467-13565, Iran
| | - Ahmad R. Esmaeilbeig
- Department of Chemistry, College
of Sciences, Shiraz University, Shiraz
71467-13565, Iran
| | - S. Masoud Nabavizadeh
- Department of Chemistry, College
of Sciences, Shiraz University, Shiraz
71467-13565, Iran
| | | | - Maciej Kubicki
- Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89b, 61-614
Poznan, Poland
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31
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Blight BA, Ko SB, Lu JS, Smith LF, Wang S. Triarylboryl-functionalized dibenzoylmethane and its phosphorescent platinum(ii) complexes. Dalton Trans 2013; 42:10089-92. [DOI: 10.1039/c3dt51276b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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