Tuning the Excited-state Properties of Cyclometalated Platinum (II) Complexes of 6-Phenyl-2,2′-bipyridine by Ancillary Acetylide Ligand
✍ Scribed by Wu Zi-Xin; Wu Li-Zhu; Yang Qing-Zheng; Zhang Li-Ping; Tung Chen-Ho
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 310 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0256-7660
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✦ Synopsis
Abstract
A series of luminescent cyclometalated platinum (II) complexes, (CNN)Pt(CC̊) [HCNN = 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 (^3^MLCT) 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.