Photophysical properties of octupolar chromophore based on triazine core and fluorene divinylene conjugated bridge  

作　　者：Li Wei Jie Ping Shi Zhi Qiang Zhou Yi Ping Cui Hong Wen Hu 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》2012年第7期867-870,共4页中国化学快报（英文版）

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

摘　　要：A novel octupolar chromophore with 1,3,5-triazine as core,2,7-divinylene-9,9-dimethylfluorene as extendedπ-conjugated bridge,triarylamine as the electron-donating end-groups was successfully synthesized and characterized.Their linear photophysical and two-photon absorption（TPA） properties were investigated by UV absorption,excited fluorescence（SPEF） spectra and nonlinear transmission method,respectively.The absorption cut-off of the chromophore is below 520 nm and it has stronger fluorescence emission in a nonpolar solvent.In addition,the chromophore exhibits larger TPA cross-section（226.0 GM） in the femtosecond regime at 800 nm.A novel octupolar chromophore with 1,3,5-triazine as core,2,7-divinylene-9,9-dimethylfluorene as extendedπ-conjugated bridge,triarylamine as the electron-donating end-groups was successfully synthesized and characterized.Their linear photophysical and two-photon absorption（TPA） properties were investigated by UV absorption,excited fluorescence（SPEF） spectra and nonlinear transmission method,respectively.The absorption cut-off of the chromophore is below 520 nm and it has stronger fluorescence emission in a nonpolar solvent.In addition,the chromophore exhibits larger TPA cross-section（226.0 GM） in the femtosecond regime at 800 nm.

关 键 词：Ocmpolar molecules Synthesis Homer-Wadsworth-Emmons reaction Photophysical properties TPA cross-section 

分 类 号：O631.24[理学—高分子化学] TQ618.97[理学—化学]