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]-...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.展开更多
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）.
文摘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.
