A new fluorine‐containing monomer 3‐(N‐trifluoroacetamido)thiophene (F‐TH ) was synthesized and characterized for the first time. Its molecular structure was determined through a single‐crystal X‐ray study. F‐TH functions as a building block in electropolymerization with 3,4‐ethylenedioxythiophene (EDOT ) and subsequently gives a novel conjugated copolymer P (F‐TH : EDOT ). Compared with the parent homopolymer poly(3,4‐ethylenedioxythiophene) (PEDOT ) film, the sponge‐like nanoporous P (F‐TH : EDOT ) film has a slightly larger band gap with a reduced hydrophilic and increased oleophilic surface. Spectroelectrochemical analysis results reveal that P (F‐TH : EDOT ) exhibits excellent electrochromic performances with a higher optical contrast (55 %) and much shorter coloring time (0.70 s) than that of PEDOT (43 %, 1.54 s). The coloration efficiency value of P (F‐TH : EDOT ) achieves up to 167.9 cm²/C, 55 % higher than that of PEDOT ( 108.1 cm²/C) . These improved electrochromic properties of P (F‐TH : EDOT ) are probably related with the enhanced wettability to electrolyte solution.

中文翻译：

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基于3-（N-三氟乙酰氨基）噻吩和3,4-乙烯二氧噻吩（EDOT）的氟化亲油电致变色共聚物

首次合成并表征了一种新的含氟单体3-（N-三氟乙酰氨基）噻吩（F-TH）。它的分子结构是通过单晶X射线研究确定的。F-TH在与3,4-亚乙基二氧噻吩（EDOT）进行电聚合反应中起着基础性作用，随后产生了一种新型的共轭共聚物P（F-TH：EDOT）。与母体均聚物聚（3,4-乙烯二氧噻吩）（PEDOT）薄膜相比，海绵状纳米多孔P（F‐TH：EDOT）膜的带隙稍大，亲水性降低，亲油性增加。光谱电化学分析结果表明，P（F-TH：EDOT）与PEDOT（43％，1.54 s）相比，具有出色的电致变色性能，具有更高的光学对比度（55％）和更短的着色时间（0.70 s）。P（F-TH：EDOT）的着色效率值达到167.9 cm ² / C，比PEDOT（ 108.1 cm ² / C ）高55％。这些改善了P（F‐TH：EDOT的电致变色特性）可能与电解液的润湿性增强有关。