Synthesis and Luminescent Properties of Iridium Complexes with Reduced Concentration Quenching Effect |
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| Authors: | ZHANG Li-ying LI Bin WANG Jian-xing |
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| Affiliation: | 1. College of Science, Henan University of Technology, Zhengzhou 450001, P. R. China;
2. Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, P. R. China |
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| Abstract: | Three novel cyclometalated ligands 1-benzyl-2-phenyl-1H-benzoimidazole(BPBM), 1-(4-methoxy-benzyl)-2-(4-methoxy-phenyl)-1H-benzoimidazole(MBMPB) and 4-[2-(4-dimethylamino-phenyl)-benzoinidazol-1-ylmethyl]-phenyl-dimethyl-amine(DBPA) were designed and synthesized, and the corresponding highly efficiency green-emitting phosphorescent iridium complexes Ir(BPBM)2(acac)(1), Ir(MBMPB)2(acac)(2) and Ir(DPBA)2(acac) (3) with acetylacetone(acac) as auxiliary ligand were also synthesized. The ligands are functionalized by bulky non-planarity substituents, thus the phosphorescent concentration quenching is substantially suppressed, and all the complexes exhibit bright photoluminescence(PL) in solid state. The photo-physical properties of the three iridium complexes were researched in detail. The results indicate that they have potential application in fabricating non-doped electrophosphorescence device. |
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| Keywords: | Green-emitting Iridium complex Bulky non-planarity substituent |
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