Abstract Multicolor electrochromic polymers have attracted great attention and interest owing to their potential applications in multicolor displays, intelligent electronic devices, and smart visualized sensors. Herein, we prepared new electrochromic polysiloxanes by chemically coupling oligoaniline groups with cathodically colouring viologen and/or anodically colouring phenothiazine groups, respectively. Due to the combined effect and synergistic effect of paired anodically colouring oligoaniline and cathodically colouring viologen, the resulting polysiloxane exhibits multicolor electrochromic behavior switching from purple to transparent grey, to light green, finally to blue. As the oligoaniline units coupled with anodically colouring phenothiazine groups, the resultant polysiloxane also demonstrates multicolor electrochromic behavior changing from transparent grey to light green, to gray-blue, to brown and finally black purple. Furthermore, good switching durability has also been revealed during the electrochromic measurements, because of their robust network molecular structure and covalent bonding to the substrate.

中文翻译：

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基于低聚苯胺和紫精/吩噻嗪基团的多色电致变色聚合物的设计与合成

摘要 多色电致变色聚合物因其在多色显示器、智能电子设备和智能可视化传感器等方面的潜在应用而备受关注。在此，我们通过分别将低聚苯胺基团与阴极着色紫罗碱和/或阳极着色吩噻嗪基团化学偶联来制备新的电致变色聚硅氧烷。由于成对的阳极着色低聚苯胺和阴极着色紫罗碱的组合效应和协同效应，所得聚硅氧烷表现出多色电致变色行为，从紫色变为透明灰色，再到浅绿色，最后变为蓝色。由于低聚苯胺单元与阳极着色吩噻嗪基团偶联，所得聚硅氧烷还表现出多色电致变色行为，从透明灰色变为浅绿色，再到灰蓝色，再到棕色，最后是黑紫色。此外，由于它们坚固的网络分子结构和与基材的共价键合，在电致变色测量过程中也显示出良好的开关耐久性。