Abstract A novel conjugated copolymer, namely poly(3,4-ethylenedioxythiophene-co-1-(3,5-bis(trifluoromethyl)phenyl)-2,5-di(thiophen-2-yl)-1H-pyrrole) (P(EDOT-co-1)) was synthesized via electropolymerization method from a mixture of 3,4-ethylenedioxythiophene and 1-(3,5-bis(trifluoromethyl)phenyl)-2,5-di(thiophen-2-yl)-1H-pyrrole comonomers. The corresponding copolymer has an optical band gap of 1.7 eV and 41% optical contrast at 525 nm with a coloration efficiency of 258 cm2/C and 1.4 s switching time. The copolymer has a multielectrochromic behavior: It has dark purple, purple, gray, green and cyan colors at different oxidation states. Electrochemical stability of P(EDOT-co-1) copolymer was also investigated and it was observed that the copolymer retained 86% of its stability under ambient conditions in the presence of oxygen (without purging the electrolyte solution with any inert gas) according to the current density and 83% according to the deposited charge even after 1000 redox cycles.

中文翻译：

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基于 3,4-亚乙基二氧噻吩和功能化二噻吩基吡咯衍生物的多电致变色共聚物的电化学和光学表征

摘要 一种新型共轭共聚物，即聚(3,4-乙撑二氧噻吩-co-1-(3,5-双(三氟甲基)苯基)-2,5-二(噻吩-2-基)-1H-吡咯)(P (EDOT-co-1)) 由 3,4-亚乙基二氧噻吩和 1-(3,5-双(三氟甲基)苯基)-2,5-二(噻吩-2-基)-的混合物通过电聚合方法合成1H-吡咯共聚单体。相应的共聚物在 525 nm 处具有 1.7 eV 的光学带隙和 41% 的光学对比度，着色效率为 258 cm2/C，转换时间为 1.4 秒。该共聚物具有多电致变色行为：在不同氧化态下具有深紫色、紫色、灰色、绿色和青色。