Abstract Carbazole derivatives are a class of nitrogen-containing aromatic heterocyclic compounds and they not only have various biological activities but also exhibit useful properties as organic materials due to their special structures. In this study, the compounds based on carbazole derivatives (N-positions were occupied by methanol, carboxylic acid, and cyanoethyl) were synthesized via a simple method. The electrochemistry and electropolymerization of these three monomers were investigated and compared with those of different N-substituted with groups attaching on the active sites of the carbazole units. The polymeric films were prepared on ITO/glass substrate by repetitive cyclic voltammetry (CV) scanning of the monomer solutions containing NaClO4-LiClO4 electrolyte dissolved in acetonitrile. The structures of the monomers and polymers were characterized by 1H-NMR, 13C-NMR, and FTIR. The electro-generated polycarbazole films exhibited redox-activity and multichromic properties with increasing potential. The remarkable electrochromic behavior of the films was explained in detail with the help of spectroelectrochemical studies. Photoluminescence spectra and quantum yields were given of polycarbazole samples in solution. In addition, solubility, molecular weight, and conductivity properties of polymers containing N-substituted groups have been discussed further.

中文翻译：

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基于N-取代咔唑衍生物的电致变色和可溶性聚合物薄膜的电合成和表征

摘要 咔唑衍生物是一类含氮芳香杂环化合物，不仅具有多种生物活性，而且由于其特殊的结构，还表现出作为有机材料的有用性质。在这项研究中，基于咔唑衍生物（N-位被甲醇、羧酸和氰乙基占据）的化合物通过简单的方法合成。研究了这三种单体的电化学和电聚合，并与不同的 N-取代基团连接在咔唑单元的活性位点上进行了比较。通过对含有溶解在乙腈中的 NaClO4-LiClO4 电解质的单体溶液进行重复循环伏安法 (CV) 扫描，在 ITO/玻璃基板上制备聚合物薄膜。单体和聚合物的结构通过1H-NMR、13C-NMR和FTIR表征。电生成的聚咔唑薄膜表现出氧化还原活性和多色性，随着电位的增加。在光谱电化学研究的帮助下，详细解释了薄膜显着的电致变色行为。给出了溶液中聚咔唑样品的光致发光光谱和量子产率。此外，还进一步讨论了含有 N-取代基团的聚合物的溶解度、分子量和导电性能。在光谱电化学研究的帮助下，详细解释了薄膜显着的电致变色行为。给出了溶液中聚咔唑样品的光致发光光谱和量子产率。此外，还进一步讨论了含有 N-取代基团的聚合物的溶解度、分子量和导电性能。在光谱电化学研究的帮助下，详细解释了薄膜显着的电致变色行为。给出了溶液中聚咔唑样品的光致发光光谱和量子产率。此外，还进一步讨论了含有 N-取代基团的聚合物的溶解度、分子量和导电性能。