Novel triphenylamine-based polyamides: Efficient preparation via benzoxazine-isocyanide-chemistry at room temperature and electrochromic properties investigation
作者:Chang Yang、Wei Shi、Xin Chen、Kesong Zhang、Xinyu Zhou、Xu Sun、Sheng Ding、Sai Liu、Zhengfeng Xie
DOI:10.1016/j.dyepig.2020.108206
日期:2020.5
solution coating (using DMSO as solvent), and electrochemical properties of P1–P3 were investigated by cyclic voltammetry (CV). P1–P3 exhibited single-step highly reversible oxidation process, reflecting their good electrochemical activity. Electrochromic properties of polymers were further analyzed by spectroelectrochemical techniques. New absorption bands at ∼750 nm appeared in UV–vis spectra of P1–P3
通过霍夫曼对其伯胺前体进行处理,成功合成了一种新型的基于三苯胺(TPA)的二异氰酸酯衍生物-4-异氰基-N-(4-异氰基苯基)-N-(4-甲氧基苯基)苯胺(M1)(2)。在室温下,以M1和双官能苯并恶嗪为起始单体,通过有效的苯并恶嗪-异氰化物化学(BIC)成功地合成了一系列在主链中包含TPA单元的聚酰胺(P1-P3)。P1–P3的化学结构已通过FT-IR验证,11 H NMR和凝胶渗透色谱法(GPC)分析。通过溶液涂布(使用DMSO作为溶剂)制备聚合物薄膜,并通过循环伏安法(CV)研究P1-P3的电化学性能。P1-P3表现出单步高度可逆的氧化过程,反映出它们良好的电化学活性。聚合物的电致变色性质通过光谱电化学技术进一步分析。当施加的电压达到〜0.65 V时,P1-P3的UV-vis光谱在〜750 nm处出现新的吸收带,并伴随着明显的视觉颜色变化(从无色变为蓝绿色)。P1-P3的响应时间和显