Synthesis,Structures and Photophysical Properties of Cationic Cyclometalated Iridium(III) Complexes Bearing N-Phenylcarbazole Group |
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| Authors: | Chen Xu Hong-Mei Li Zhi-Qiang Wang Xin Han Wei-Jun Fu Xin-Qi Hao |
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| Affiliation: | 1. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, 212003 Zhenjiang, Jiangsu, P. R. China;2. College of Chemistry and Chemical Engineering, Luoyang Normal University, 471022 Luoyang, Henan, P. R. China;3. College of Chemistry and Molecular Engineering, Zhengzhou University, 450001 Zhengzhou, Henan, P. R. China |
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| Abstract: | Four cationic cyclometalated IrIII complexes [(MeOPCz)2Ir(bpy)]PF6 ( 3 ), [(MeOPCz)2Ir(dtb-bpy)]PF6 ( 4 ), [(TFPCz)2Ir(bpy)]PF6 ( 5 ), and [(TFPCz)2Ir(dtb-bpy)]PF6 ( 6 ) were successfully synthesized using two new cyclometalated ligands 9-phenyl-3-(4-methoxypyridin-2-yl)-9H-carbazole (MeOPCz) 1 and 9-phenyl-3-(4-trifluoromethylpyridin-2-yl)-9H-carbazole (TFPCz) 2 in combination with 2,2'-bipyridine (bpy) and 4,4'-di-tert-butyl-2,2'-bipyridine (dtb-bpy) as ancillary ligands. These complexes adopt the distorted octahedral configuration, and the complexes 5 and 6 crystallize in the centrosymmetric space group C2/c. Emission wavelength of these complexes can be tuned from 583 nm to 628 nm by the substituents (methoxy, trifluoromethyl and tert-butyl groups) in ligands. All of these complexes show relatively high emission efficiencies (0.28–0.41) and short lifetimes (0.242–0.461 μs). |
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| Keywords: | Cationic cyclometalated IrIII complexes Iridium Structure elucidation Cationic cyclometalated IrIII complexes Iridium Structure elucidation Phosphorescence Electroluminescence |
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