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Synthesis and luminescent properties of iridium complexes with reduced concentration quenching effect

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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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Authors and Affiliations

  1. College of Science, Henan University of Technology, Zhengzhou, 450001, P. R. China

    Li-ying Zhang & Jian-xing Wang

  2. Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, P. R. China

    Bin Li

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  1. Li-ying Zhang
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  2. Bin Li
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Correspondence to Li-ying Zhang.

Additional information

Supported by the Basic Research Foundation of Henan University of Technology, China(No.11JCYJ17) and the Science Foundation of Henan University of Technology, China(No.2009BS036).

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Zhang, Ly., Li, B. & Wang, Jx. Synthesis and luminescent properties of iridium complexes with reduced concentration quenching effect. Chem. Res. Chin. Univ. 29, 686–689 (2013). https://doi.org/10.1007/s40242-013-3005-y

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  • DOI: https://doi.org/10.1007/s40242-013-3005-y

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