Synthesis and properties of tribranched chromophores with triazine and fluorene units  

作　　者：Li Liu Zhi Qiang Zhou Jie Ping Shi Chang Gui Lu Yi Ping Cui Guo Yuan Lu 

机构地区：[1]Department of Chemistry, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, China [2]Advanced Photonics Center, Southeast University, Nanjing 210096, China

出　　处：《Chinese Chemical Letters》2011年第10期1147-1150,共4页中国化学快报（英文版）

基　　金：supported financially by National Natural Science Foundation of China(Nos.20774039 and 20872061);the National Basic Research(No.2007CB925103)

摘　　要：Two tribranched chromophores,1,3,5-triazine as electron deficient core,9,9-dimethylfluorene asπ-conjugated bridge, diphenylamino（4a） and naphthylamino（4b） as electron-donating end-groups,were successfully prepared via Buchwald-Hartwig coupling reaction.Their linear photophysical and two-photon absorption（TPA） properties were investigated by absorption, fluorescence and nonlinear transmission method,respectively.The absorption cut-offs of the chromophores are below 550 nm and both chromophores have strong fluorescence emission.The compound 4a（206.3 GM） exhibits larger TPA cross-section than 4b （57.8 GM） in the femtosecond regime at 800 nm.Two tribranched chromophores,1,3,5-triazine as electron deficient core,9,9-dimethylfluorene asπ-conjugated bridge, diphenylamino（4a） and naphthylamino（4b） as electron-donating end-groups,were successfully prepared via Buchwald-Hartwig coupling reaction.Their linear photophysical and two-photon absorption（TPA） properties were investigated by absorption, fluorescence and nonlinear transmission method,respectively.The absorption cut-offs of the chromophores are below 550 nm and both chromophores have strong fluorescence emission.The compound 4a（206.3 GM） exhibits larger TPA cross-section than 4b （57.8 GM） in the femtosecond regime at 800 nm.

关 键 词：Octupolar molecules Buchwald-Hartwig cross-coupling Photophysical properties TPA cross-section 

分 类 号：O631.24[理学—高分子化学] S482.4[理学—化学]