Synthesis and Luminescent Properties of Platinum-Containing Polyynes with Tetraacetylenic 9,9-Dihexylfluorene Units  

作　　者：柳利 陈祖兴 柳士忠 黄维扬 

机构地区：[1]Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Faculty of Chemistry and Chemical Engineering, Hubei University, Wuhan, Hubei 430062, China [2]Department of Chemistry and Centre for Advanced Luminescence Materials, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, China

出　　处：《Chinese Journal of Chemistry》2006年第8期1020-1025,共6页中国化学（英文版）

摘　　要：Soluble platinum（Ⅱ） polyyne polymers trans-{Pt-[P（C4H8N）3]2（C≡C）2R（C≡C）2-}n and trans-{Pt-[P（C4H3O）3]2（C ≡C）2R（C ≡ C）2- }n （R = 9,9-dihexylfluorene-2,7-diyl） have been prepared in good yields by CuI-catalyzed polymerization involving the dehydrohalogenating coupling of trans-{PtCl2[P（C4H8N）3]2} and trans-{PtC12[P （C4H3O）312} with H（C≡C）2R（C≡C）2H, respectively. We report the optical spectroscopy of these polyplatinaynes. The influence of the heavy metal atom in these metal alkynyl systems on the intersystem crossing rate and the spatial extent of lowest singlet and triplet excitons was systematically characterized. Our investigations indicate that the organic triplet emissions can be harvested by the heavy-atom effect which enables efficient intersystem crossing from the S1 singlet excited state to the T1 triplet excited state.Soluble platinum（Ⅱ） polyyne polymers trans-{Pt-[P（C4H8N）3]2（C≡C）2R（C≡C）2-}n and trans-{Pt-[P（C4H3O）3]2（C ≡C）2R（C ≡ C）2- }n （R = 9,9-dihexylfluorene-2,7-diyl） have been prepared in good yields by CuI-catalyzed polymerization involving the dehydrohalogenating coupling of trans-{PtCl2[P（C4H8N）3]2} and trans-{PtC12[P （C4H3O）312} with H（C≡C）2R（C≡C）2H, respectively. We report the optical spectroscopy of these polyplatinaynes. The influence of the heavy metal atom in these metal alkynyl systems on the intersystem crossing rate and the spatial extent of lowest singlet and triplet excitons was systematically characterized. Our investigations indicate that the organic triplet emissions can be harvested by the heavy-atom effect which enables efficient intersystem crossing from the S1 singlet excited state to the T1 triplet excited state.

关 键 词：PLATINUM ACETYLIDE BUTADIYNE FLUORENE triplet emission 

分 类 号：O625.153[理学—有机化学]