以3,4-乙烯二氧噻吩(EDOT)和吡咯-3-甲酸(P3C)为共聚单体,EDOT和P3C分别按物质的量比1∶1,3∶1,5∶1,10∶1配比,通过电化学聚合制得了4种聚(3,4-乙烯二氧噻吩-吡咯-3-甲酸)薄膜,并依次命名为P(EDOT∶P3C)-1,P(EDOT∶P3C)-3,P(EDOT∶P3C)-5和P(EDOT∶P3C)-10.光谱电化学测试结果表明,4种共聚物薄膜都具有优良的电致变色性能,同时具有较好的电化学活性和较高的光学对比度.与聚3,4-乙烯二氧噻吩(PEDOT)相比,P(EDOT∶P3C)能展示更丰富的颜色变化,如P(EDOT∶P3C)-1薄膜随着电压的变化,可呈现从暗红色、浅褐色、灰蓝色到蓝色的变化.此外,基于EDOT和P3C以及钛氧簇[Ti_7(OEt)_(19)O_5(CoBr)],我们还设计合成了含钛共聚物薄膜P(EDOT∶P3C)-1-Ti,该薄膜不仅具有电致变色性能,而且还具有电催化氧化水的活性.
Four new copolymers P ( EDOT : P3C ) -1, P ( EDOT : P3C ) -3, P ( EDOT : P3C) -5, P ( EDOT : P3C)-10 were prepared via electrochemical co-polymerization using different molar ratios( 1 : 1, 3 : 1, 5 : 1, 10 : 1 ) of 3,4-ethylenedioxythiophene(EDOT) and pyrrole-3-carboxylic acid(P3C). The prepared four copol- ymers have good electrochromic properties, high electrochemical activity and good transmittance. Compared with poly (3,4-ethylenedioxythiophene) (PEDOT), the prepared eopolymers have more abundant color change. P( EDOT: P3C)-1 has mainly four colors under different potentials, namely, dark red, pale brown, grey blue and blue. P(EDOT: P3C)-3 and P (EDOT: P3C)-5 possess the color change of purple, light pur- ple and blue. P( EDOT: P3C)-10 can be dark purple, light purple and blue under different potentials. In ad- dition, we also prepared a copolymer P(EDOT: P3C)-I-Ti based on EDOT, P3C and polyoxotitanate cluster [ TiT(OEt) 1905(CoBr) ]. This film not only exhibits typical eleetrochromie properties but also has the ability of electric-catalytic oxidation of water.