Solution-processable, high-T<sub>g</sub>, ambipolar polyimide electrochromics bearing pyrenylamine units
作者:Yi-Chun Kung、Sheng-Huei Hsiao
DOI:10.1039/c0jm02642e
日期:——
Two new pyrenylamine-based polyimides were prepared from the polycondensation reaction of N,N-di(4-aminophenyl)-1-aminopyrene with pyromellitic dianhydride (PMDA) or 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTDA). The polyimide derived from PMDA is soluble in hot N-methyl-2-pyrrolidone and can be solution-cast into a flexible and strong film. The polyimides showed high glass transition temperatures (Tg > 364 °C) and high thermal stability. Cyclic voltammetry studies revealed that these two polyimides were ambipolar; they showed well-defined and reversible redox couples during both p- and n-doping processes, together with multi-electrochromic behaviors. The polymer films also exhibited high coloration efficiency, high redox stability, and fast response time.
通过 N,N-二(4-氨基苯基)-1-氨基吡芘与苯并吡喃二酸酐(PMDA)或 1,4,5,8-萘四羧酸二酸酐(NTDA)的缩聚反应,制备了两种新的芘胺基聚酰亚胺。由 PMDA 衍生的聚酰亚胺可溶于热的 N-甲基-2-吡咯烷酮,并可溶液浇铸成柔韧而坚固的薄膜。聚酰亚胺显示出较高的玻璃化转变温度(Tg > 364 ℃)和较高的热稳定性。循环伏安法研究表明,这两种聚酰亚胺具有伏极性;它们在 p 掺杂和 n 掺杂过程中都表现出明确的可逆氧化还原偶联,并具有多重电致变色行为。聚合物薄膜还表现出高着色效率、高氧化还原稳定性和快速响应时间。