Abstract A 2,5-di(thienyl)pyrrole derivative bearing a dansyl substituent (SNSD) was prepared by a simple synthetic route and its copolymerization with 3,4-ethylenedioxythiophene (EDOT) was successfully performed electrochemically in acetonitrile (CH3CN) containing tetrabutylammonium tetrafluoroborate ((C4H9)4NBF4). The electrochromic properties of the P(SNSD-co-EDOT) films were investigated by spectroelectrochemical techniques and, besides high absorption in the near infrared region, such films presented multielectrochromism with rainbow-like colors depending on the applied potential, as can be seen in the track of the CIE 1931 xy chromaticity coordinates. P(SNSD-co-EDOT) films deposited on ITO with 1:5 feed ratio presented chromatic contrast (Δ%T) at 560 and 990 nm of 25.1 and 35.3, respectively, coloration efficiency (η) in the range of 110 – 180 cm2 C−1, fast switching time (

中文翻译：

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基于带有丹酰基取代基的 2,5-二（噻吩基）吡咯衍生物和 3,4-亚乙基二氧噻吩的彩虹多电致变色共聚物

摘要 采用简单的合成路线制备了带有丹酰基取代基的 2,5-二(噻吩基)吡咯衍生物 (SNSD) 并在含有四氟硼酸四丁基铵的乙腈 (CH3CN) 中成功地与 3,4-乙撑二氧噻吩 (EDOT) 共聚。 ((C4H9)4NBF4)。通过光谱电化学技术研究了 P(SNSD-co-EDOT) 薄膜的电致变色性能，除了在近红外区域具有高吸收外，这种薄膜还呈现出多电致变色，取决于施加的电位，具有彩虹般的颜色，如在CIE 1931 xy 色度坐标的轨迹。P(SNSD-co-EDOT) 薄膜沉积在 ITO 上，进料比为 1:5，在 560 和 990 nm 处的色差 (Δ%T) 分别为 25.1 和 35.3，