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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; These complexes are brightly emissive both in fluid solution and in the solid state, attributed to triplet metal to ligand charge transfer (3M LCT 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.