Synthesis, characterization, effect of triaryl ring Substituents groups on thermal and spectral properties of New soluble triphenylamine-based aromatic polyamides

FTIR, 1H and 13C NMR spectroscopic techniques were used to identify the chemical structures of the dicyano intermediates, the carboxylic acid monomer and the resultant poly(amine-amide)s. These aromatic poly(amine-amide)s were found to be readily soluble in a variety of organic solvents and could afford strong and tough films via solution casting. They exhibited excellent thermal stability associated with high glass transition temperatures (Tg＝248.32-290.46℃) and 10 % weight loss temperatures in excess of 522℃ in nitrogen. In dilute NMP solution, these polymers exhibited a medium to strong photoluminescence in the blue region at (425-443) nm. Cyclic voltammetry of the poly(amine-amide)s films cast onto an ITO-coated glass substrate in dry acetonitrile containing 0.1 M of Tetrabutylammonium perchlorate(TBAP) as an electrolyte exhibited one oxidation redox couples (Eonset) at (1.30-1.37) V vs Ag/AgCl , and revealed electrochromic characteristics with a color change from pale yellow to blue at applied potentials switched between 0.0 and 1.6 V.

利用傅里叶变换红外光谱（FTIR）、1H 和 13C 核磁共振光谱技术，对二氰基中间体、羧酸单体以及生成的聚（胺-酰胺）进行了化学结构鉴定。研究发现，这些具有芳香性的聚（胺-酰胺）在多种有机溶剂中均具有良好的溶解性，并通过溶液浇铸方法可形成强度高且韧性好薄膜。该聚合物系列表现出卓越的热稳定性，与其高玻璃化转变温度（Tg＝248.32-290.46℃）和氮气环境下超过522℃的10%重量损失温度密切相关。在稀释的NMP溶液中，这些聚合物在蓝光区域（425-443）nm范围内呈现出中等至强烈的荧光。将聚（胺-酰胺）薄膜涂覆于ITO涂层玻璃基板上，并在干燥的氰化乙腈溶液中，加入0.1 M的四丁基铵高氯酸盐（TBAP）作为电解质，进行循环伏安法测试，结果显示在（1.30-1.37）V相对于Ag/AgCl的氧化还原电位下出现一个氧化还原对（Eonset），并展现出电致变色特性，在施加的电位在0.0至1.6 V之间切换时，颜色从浅黄变为蓝色。