侧链含偶氮苯发色团的聚噻吩衍生物的制备及性能

Preparation and Properties of Polythiophene Derivatives Containing Azobenzene Chromophore in Side Chain

以4-(4′-硝基偶氮苯)-1-萘酚、4-氯正丁醇和3-噻吩乙酸为原料,通过脱氯化氢反应、酯化反应和化学氧化聚合反应,制备了具有推拉电子结构的侧链含偶氮苯发色团的聚噻吩衍生物(PATh4)。采用红外光谱(FT-IR)、紫外光谱(UV-Vis)、凝胶渗透色谱和核磁共振(1H-NMR)对PATh4的结构进行了表征。研究表明,PATh4的热稳定性较好,起始分解温度约为204℃,玻璃化转变温度约为75℃;其X射线衍射(XRD)曲线呈现宽的漫反射峰,说明PATh4是非晶态结构;PATh4具有良好的光致发光性能,在二甲基亚砜中其荧光光谱呈现两个明显的发射峰,分别位于540 nm和698 nm,对应的荧光寿命分别为9.5×10-10s和5.7×10-9s。

Polythiophene derivative（PATh4） containing azobenzene chromophore in side chain which has push-pull electronic structure was synthesized through dehydrochlorination,esterification and chemical-oxidative polymerization reactions,using 4-（4′-nitrophenylazo）-1-naphthol,4-chloro-1-butanol and 3-thenylacetic acid as raw materials.The structure of PATh4 was characterized by FT-IR,UVVis,gel permeation chromatography and 1H-NMR.The results indicate that PATh4 has good thermal stability,the initial decomposition temperature of PATh4 is about 204 ℃ and its glass transition temperature is about 75 ℃;The XRD pattern of PATh4 presents a broad diffusing reflection peak,showing that it is amorphous.The photoluminescence spectrum shows that PATh4 is a good photoluminescence polymer.The fluorescence spectrum presents two obvious emitting peaks that located at 540 and 698nm in dimethyl sulfoxide,the corresponding fluorescence lifetime is 9.5×10-10 and 5.7×10-9 s,respectively.