The tridentate ligand L and its complexes with transition-metal ions have been prepared and characterized. The polycondensation reactions of transition-metal complexes with different dialdehydes led to the formation of transition-metal-complex-based polyazomethines, which have been obtained by on-substrate polymerization, and their electrochemical and electrochromic performance have been investigated. The most interesting properties are exhibited by polymers of Fe(II) and Cu(II) ions obtained by the reaction of the appropriate complexes with a triphenylamine-based dialdehyde. Fe(II) polymer P1 undergoes a reversible oxidation/reduction process and a color change from orange to gray due to the oxidation of Fe(II) to Fe(III) ions concomitant with the oxidation of the triphenylamine group. Its electrochromic properties such as long-term stability, switching times, and coloration efficiencies have been investigated, providing evidence of the utility of the on-substrate polycondensation reaction in the formation of thin films of electrochromic metallopolymers.

中文翻译：

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走向电致变色金属聚合物：基于过渡金属离子配合物的聚偶氮甲碱的合成与性能

三齿配体L及其与过渡金属离子的配合物已被制备和表征。过渡金属配合物与不同二醛的缩聚反应导致形成过渡金属配合物基聚偶氮甲碱，该聚偶氮甲碱已通过基底聚合获得，并对其电化学和电致变色性能进行了研究。最有趣的特性是通过适当的配合物与基于三苯胺的二醛反应获得的 Fe(II) 和 Cu(II) 离子的聚合物。Fe(II)聚合物P1由于伴随着三苯胺基团的氧化，Fe(II) 氧化为 Fe(III) 离子，因此经历了可逆的氧化/还原过程，颜色从橙色变为灰色。已经研究了其电致变色特性，例如长期稳定性、转换时间和着色效率，提供了基材上缩聚反应在形成电致变色金属聚合物薄膜中的效用的证据。