Synthesis and Luminescent Properties of Iridium Complexes with Reduced Concentration Quenching Effect  

作　　者：ZHANG Ll-ying L1 Bin WANG Jian-xing 

机构地区：[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

出　　处：《Chemical Research in Chinese Universities》2013年第4期686-689,共4页高等学校化学研究（英文版）

基　　金：Supported by the Basic Research Foundation of Henan University of Technology, China（No.llJCYJ17） and the Science Foundation of Henan University of Technology, China（No.2009BS036）.

摘　　要：Three novel cyclometalated ligands 1-benzyl-2-phenyl-lH-benzoimidazole（BPBM）, 1-（4-methoxy- benzyl）-2-（4-methoxy-phenyl）-lH-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.Three novel cyclometalated ligands 1-benzyl-2-phenyl-lH-benzoimidazole（BPBM）, 1-（4-methoxy- benzyl）-2-（4-methoxy-phenyl）-lH-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.

关 键 词：Green-emitting Iridium complex Bulky non-planarity substituent 

分 类 号：O625.34[理学—有机化学] TN104.3[理学—化学]