New processable, electroactive, alternate copolymers consisting of dialkylbithiophene units and oligoanilinethiophene units have been prepared by post-polymerization functionalization of a specially prepared precursor polymer, namely poly[(4,4″-dioctyl-2,2′∶5′,2″-terthiophene-3′-yl)ethyl acetate], carried out via its hydrolysis and consecutive branching aniline dimer or tetramer through the amidation reaction. The precursor polymer is interesting by itself because it gives a very clear spectroelectrochemical response over a very narrow potential range. The proposed method enables the preparation of regiochemically better defined alkylthiophene-oligoanilinethiophene copolymers with higher content of oligoaniline side groups as compared to previously used methods. Cyclic voltammetry investigations combined with UV–vis–NIR, EPR and Raman spectroelectrochemistry show that both the oligoaniline side groups and poly(thienylene) main chain are electrochemically active. Significant differences for the side group electrochemistry are observed in acidified and nonacidified electrolytes making the prepared new copolymer a good candidate for electrochromic applications in diversified electrolytes.
通过对特殊制备的前体聚合物进行后聚合官能化,制备了由二烷基联
噻吩单元和低
聚苯胺噻吩单元组成的新型可加工、电活性交替共聚物,即聚[(4,4”-二辛基-2,2′∶5′,2”) -三
噻吩-3'-基)
乙酸乙酯],通过其
水解和通过酰胺化反应连续支化
苯胺二聚体或四聚体进行。前体聚合物本身就很有趣,因为它在非常窄的电位范围内给出了非常清晰的光谱电
化学响应。与以前使用的方法相比,所提出的方法能够制备区域
化学性质更好的烷基
噻吩-低
聚苯胺噻吩共聚物,其具有更高含量的低
聚苯胺侧基。循环伏安法研究与紫外-可见-近红外、EPR 和拉曼光谱电
化学相结合表明低
聚苯胺侧基和聚(
噻吩)主链均具有电
化学活性。在酸化和非酸化电解质中观察到侧基电
化学的显着差异,使得制备的新型共聚物成为多种电解质中电致变色应用的良好候选者。