Tuning the Excited-state Properties of Cyclometalated Platinum(II) Complexes of 6-Phenyl-2,2′-bipyridine by Ancillary Acetylide Ligand  

作　　者：吴梓新 吴骊珠 杨清正 张丽萍 佟振合 

机构地区：[1]Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, China

出　　处：《Chinese Journal of Chemistry》2003年第2期196-199,共4页中国化学（英文版）

基　　金：ProjectsupportedbytheMinistryofScienceandTechnologyofChina (Nos .G2 0 0 0 0 7810 4andG2 0 0 0 0 775 0 2 )andtheNationalNaturalScienceFoundationofChina (Nos .2 9992 5 3 3 ;2 983 2 0 40and 2 0 0 72 0 3 8)

摘　　要：A series of luminescent cyclometalated platinum(II) complexes, (C^N^N)Pt(C≡CR) [HC^N^N=4 (4 tolyl) 6 phenyl 2,2′ bipyridine; R=4 chlorophenyl (1), phenyl (2) and 4 tolyl (3)], were synthesized, and their spectroscopic properties have been examined. These complexes are brightly emissive both in fluid solution and in the solid state, attributed to triplet metal to ligand charge transfer ( 3MLCT) state. The excited state energy can be tuned by ancillary acetylide ligands. The emission lifetimes in dichloro^methane solution at room temperature were up to 1 64 μs and the emission quantum yields were in the range of 0 03-0 15.A series of luminescent cyclometalated platinum(II) complexes, (C^N^N)Pt(C≡CR) [HC^N^N=4 (4 tolyl) 6 phenyl 2,2′ bipyridine; R=4 chlorophenyl (1), phenyl (2) and 4 tolyl (3)], were synthesized, and their spectroscopic properties have been examined. These complexes are brightly emissive both in fluid solution and in the solid state, attributed to triplet metal to ligand charge transfer ( 3MLCT) state. The excited state energy can be tuned by ancillary acetylide ligands. The emission lifetimes in dichloro^methane solution at room temperature were up to 1 64 μs and the emission quantum yields were in the range of 0 03-0 15.

关 键 词：cyclometalated platinum(II) complex ACETYLIDE luminescence MLCT (metal  to  ligand change transfer) 

分 类 号：O641.4[理学—物理化学]