以3,4-二溴噻吩(DBrT)为原料,通过亲核取代和醚交换反应制备了带有羟基的双烷氧基取代噻吩,再采用开环-取代反应引入磺酸官能团,得到新型取代噻吩单体EDOT-S.采用红外光谱、紫外光谱和核磁共振氢谱、碳谱对此单体进行了表征.采用循环伏安法进行电化学聚合制得PEDOT-S,该聚合物的氧化电位和还原电位分别为442 mV和371 mY(vs.SCE).PEDOT-S膜具有可逆的电致变色性能,在氧化态呈蓝绿色,还原态呈紫红色.
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