Enhanced near-infrared electrochromism in triphenylamine-based aramids bearing phenothiazine redox centers
作者:Hung-Ju Yen、Guey-Sheng Liou
DOI:10.1039/c0jm01889a
日期:——
A series of organosoluble polyamides based on N-phenothiazinylphenyl redox units showing anodically electrochromic characteristics both in the near-infrared (NIR) and visible light regions were prepared from the phosphorylation polyamidation reactions of a newly synthesized diamine monomer, 4,4′-diamino-4′′-N-phenothiazinyltriphenylamine, with various dicarboxylic acids. These polymers were readily soluble in many polar solvents and showed useful levels of thermal stability associated with relatively high glass-transition temperatures (Tg) (255–277 °C) and high char yields (higher than 67% at 800 °C in nitrogen). In addition, the polymer films showed reversible electrochemical oxidation with enhanced NIR contrast, high coloration efficiency (CE), low switching time, and anodic green/purple electrochromic behaviors.
一系列基于N-苯噻嗪基苯类还原氧化单元的有机溶解聚酰胺被制备,这些聚合物在近红外(NIR)和可见光区域均表现出阳极电致变色特性。它们是通过新合成的二胺单体4,4′-二氨基-4′′-N-苯噻嗪基三苯胺与各种二羧酸的磷酸化聚酰胺化反应制得的。这些聚合物在许多极性溶剂中易溶解,并显示出良好的热稳定性,伴随有相对较高的玻璃化转变温度(Tg)(255–277 °C)和高的炭化产率(在氮气中800 °C时超过67%)。此外,聚合物薄膜表现出可逆的电化学氧化,具有增强的NIR对比度、高着色效率(CE)、短的切换时间以及阳极绿色/紫色电致变色行为。