Nowacki Marcin, Hoffmann Marcin, Wałęsa-Chorab Monika
Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland.
Int J Mol Sci. 2025 May 17;26(10):4807. doi: 10.3390/ijms26104807.
The electrochromic naphthalenediimide (NDI) based monomer containing styrene pedant groups, which are capable of polymerization, was prepared, and the formation of its polymer via a photopolymerization reaction was described. Both the monomer and polymer exhibited a color change in the visible range from transparent or slightly yellow, respectively, followed by brown-red to green. This was the result of a two-step reduction reaction of NDI core to radical anion and dianion, respectively. The device constructed using the polymer as an active material was found to exhibit good electrochromic stability over 500 redox cycles. The switching times were calculated to be 18 s and 6 s for the coloration and bleaching steps, respectively. The presented results showed the usability of the photopolymerization of styrene-based monomers in the generation of the stable electrochromic layers of polymers.
制备了一种含苯乙烯侧基且能够聚合的基于电致变色萘二亚胺（NDI）的单体，并描述了其通过光聚合反应形成聚合物的过程。单体和聚合物在可见光范围内均呈现颜色变化，分别从透明或略带黄色开始，随后变为棕红色至绿色。这是NDI核心分别两步还原为自由基阴离子和二价阴离子的结果。发现使用该聚合物作为活性材料构建的器件在500次氧化还原循环中表现出良好的电致变色稳定性。计算得出着色和漂白步骤的切换时间分别为18秒和6秒。所呈现的结果表明基于苯乙烯的单体光聚合在生成稳定的聚合物电致变色层方面具有实用性。
