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通过Heck偶联法制备了一种新型聚噻吩衍生物——2,5-二乙烯基-3,4-二辛基噻吩-共-2,5-二苯基-1,3,4-二噁唑(PO2TV-OXD),用核磁共振氢谱(1H NMR)及凝胶色谱(GPC)对其结构进行分析和表征。用紫外-可见光谱(UV-Vis)、荧光光谱(PL)及电化学分析研究其光学和电化学性能,并与3,4-二辛基噻吩均聚物(PO2T)进行了对比研究。研究表明:主链上引入吸电子能力较强的1,3,4-二噁唑基团,明显增加了聚合物的能隙,提高了聚合物的荧光量子效率。
A novel polythiophene derivative 2,5-divinyl-3,4-dioctylthiophene-co-2,5-diphenyl-1,3,4-bis (PO2TV-OXD). Its structure was analyzed and characterized by 1H-NMR and GPC. The optical and electrochemical properties of 3,4-dioctylthiophene homopolymer (PO2T) were investigated by UV-Vis, PL and electrochemical analyzes. The results showed that the 1,3,4-oxadiazole group with strong electron-withdrawing ability was introduced into the main chain, which significantly increased the energy gap of the polymer and enhanced the fluorescence quantum efficiency of the polymer.