A three new triphenylamine-containing aromatic diacid monomers, 4,4-dicarboxy-4-phenoxy-triphenylamine (Ma), 4,4-dicarboxy-4-(N-pyrrolyl)triphenylamine (Mb), 4,4,4,4-(1,4-phenylenebis(azanetriyl))tetrabenzoic acid (Mc) were successfully synthesized via the aromatic nucleophilic flouro-displacement reaction of 4-fluorobenzonitrile with aniline-derivatives, respectively using sodium hydride as the base, followed by alkaline hydrolysis of the dinitrile intermediate (Ia),(Ib), (Ic). A series of poly(amine-amide)s were prepared by the direct phosphorylation polycondensation from the newly synthesized diacid monomer with various aromatic diamines. FTIR, 1H and 13C NMR spectroscopic techniques were used to identify the chemical structures of the intermediate dicyano, carboxylic acid monomer and resultant poly(amine-amide)s. These aromatic poly(amine-amide)s were found to be easily soluble in a variety of organic solvents and could afford strong and hard films via solution casting. They exhibited excellent thermal stability associated with high glass transition temperatures (Tg = 246.28-292.62 °C) and 10 % weight loss temperatures in excess of 578 °C in nitrogen. In dilute NMP solution, these polymers exhibited a medium to strong photoluminescence in the blue region at 423-488 nm. Cyclic voltammetry of the poly(amine-amide)s films cast onto an indium tin oxide-coated glass substrate in dry acetonitrile containing 0.1 M of tetrabutylammonium perchlorate (TBAP) as an electrolyte exhibited one oxidation redox couples (Eonset) at (1.32-1.38) V vs Ag/AgCl and revealed electrochromic characteristics with a colour change from pale yellow to blue at applied potentials switched between 0.0 and 1.7 V.
通过芳香族亲核
氟置换反应,成功合成了三种新的含
三苯胺的芳香族二元酸单体:4,4-二羧基-4-苯氧基
三苯胺(Ma)、4,4-二羧基-4-(N-
吡咯基)
三苯胺(Mb)、4,4,4,4-(1、以氢化
钠为碱,分别通过 4-
氟苯腈与
苯胺衍
生物的芳香族亲核
芴置换反应,再通过二腈中间体 (Ia)、(Ib) 和 (Ic) 的碱性
水解,成功合成了 4,4,4,4-(1,4-苯基双(偶氮三酰基))四
苯甲酸 (Mc)。新合成的二元酸单体与各种芳香族二胺通过直接
磷酸化缩聚反应制备了一系列聚(胺)酰胺。利用傅立叶变换红外光谱、1H 和 13C NMR 光谱技术,确定了中间二
氰基、
羧酸单体和生成的聚(胺酰胺)的
化学结构。研究发现,这些芳香族聚(胺-酰胺)很容易溶于各种有机溶剂,并能通过溶液浇铸形成坚固的薄膜。它们具有出色的热稳定性,
玻璃化转变温度高(Tg = 246.28-292.62 ℃),在氮气中的 10 % 失重温度超过 578 ℃。在稀
NMP 溶液中,这些聚合物在 423-488 纳米波长的蓝色区域显示出中等到较强的光致发光。在含有 0.1 M
四丁基高氯酸铵(T
BAP)作为电解质的干燥
乙腈中,浇铸在涂有氧化
铟锡的
玻璃基底上的聚胺酰胺薄膜在 (1.32-1.38) V 对 Ag/AgCl 的循环伏安法中显示出一种氧化还原偶(Eonset),并显示出电致变色特性,在 0.0 至 1.7 V 的应用电位转换时,颜色从淡黄色变为蓝色。