Siloles and Acetenyl Aromatics Copolymers: Synthesis, Characterization and Photophysical Properties  

作　　者：Zhenhua He Guoqiao Lai Zhifang Li Xiao Yuan Yongjia Shen Chengyun Wang 

机构地区：[1]Key Laboratory for Advanced Materials and Institute of Fine Chemicals,East China University of Science and Technology,Shanghai 200237,China [2]Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education,Hangzhou Normal University,Hangzhou,Zhejiang 310012,China

出　　处：《Chinese Journal of Chemistry》2015年第5期550-558,共9页中国化学（英文版）

基　　金：the financial support from the National Natural Science Foundation of China(Nos.20872035,21076078),and the Hangzhou Normal University.

摘　　要：Two copolymers,poly(1,1-dimethyl-3,4-diphenylsilole-alt-N-hexyl-3,6-diethynylcarbazole)(PS-DyCz)and poly-(1,1-dimethyl-3,4-diphenylsilole-alt-2,7-diethynyl-9,9'-dihexylfluorene)(PS-DyF),were synthesized by Sonogashira coupling reaction of 2,5-dibromo-1,1-dimethyl-3,4-diphenylsilole and N-hexyl-3,6-diethynylcarbazole or 2,7-diethynyl-9,9'-dihexylfluorene,respectively.The chemical structures of the copolymers were characterized by NMR,FT-IR techniques.Their thermal and photophysical properties were evaluated by TGA,DSC,UV-Vis and fluorescence spectroscopy,respectively.The weight-averaged molecular weights(Mw)of PS-DyCz and PS-DyF are 1.20×10^(4) and 3.83×10^(4) Da,respectively.The degree of polymerization is 8 and 22 units.Theseπ-conjugated polymers exhibited lower band-gap of 2.25 and 2.70 eV due to the presence of silole rings and C≡C triple bonds in their backbone,the results were consistent with the density functional(DFT)calculations at the B3LYP/6-31G^(*)level.

关 键 词：SILOLE ACETYLENE CARBAZOLE FLUORENE conjugated polymer density functional theory 

分 类 号：O63[理学—高分子化学]