聚[3-(6-溴己基)噻吩]的合成与表征

Preparation and characterization of poly (3-bromohexylthiophene)

以3-溴噻吩、正丁基锂和1,6-二溴己烷为原料,经过改良的Li-Br交换反应、溴化反应、GRIM法成功合成了聚[3-(6-溴己基)噻吩]。通过傅里叶变换红外光谱(FT-IR),核磁共振波谱(1 H-NMR)、GPC、紫外吸收分光光谱(UV-Vis)及荧光发射光谱(PL)对中间产物及聚合物进行了结构和性能表征。结果表明,所合成聚合物与目标产物的结构一致。聚合物的数均分子量为5725,多分散系数为1.39,在氯仿溶液中最大吸收波长在398nm,最大发射波长在553nm。

Poly （3-bromohexylthiophene） was successfully synthesized by using 3-bromothiophe,n-BuLi and 1,6-dibromohexane via the reaction of improved Li-Br exchange, bromination and Grignard reaction. The structures of intermedi-ates and polymer were characterized by FTIR,1H-NMR, GPC, UV-Vis and PL. The results showed that the structure of polymer was consistent with goal products. The number average molecular weight of polymer was 5725,and the polydisper- sity was 1.39. The maximum absorption spectrum wavelength of UV-Vis was 398nm and the maximum emission spectrum wavelength of PL was 553nm in the solution of chloroform.