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首页> 外文期刊>RSC Advances >High coloration efficiency and fast switching speed of poly(amic acid-imide)s containing triphenylamine in acidic electrolyte
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High coloration efficiency and fast switching speed of poly(amic acid-imide)s containing triphenylamine in acidic electrolyte

机译：酸性电解液中含三苯胺的聚酰胺酰胺的高着色效率和快速转换速度

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摘要

Two novel poly(amic acid-imide)s (PAA-IMs) were prepared from two electroactive diamines, 4,4'-diamino4 ''- methoxytriphenylamine and 4,4'-diamino-4 ''-phenoxytriphenylamine, and pyromellitic dianhydride (PMDA) by conventional polycondensation, followed by partial imidization at 150 degrees C. The resulting PAA-IMs had significant levels of thermal stability associated with 2% weight-loss temperatures between 195 and 370 degrees C. Flexible PAA-IM films with light color showed excellent adhesion on the surface of an indium-tin oxide (ITO)-coated glass substrate. The electrochromic properties were examined by electrochemical and spectroelectrochemical methods. Cyclic voltammograms of the PAA-IM films cast onto ITO substrate exhibited a reversible oxidation at 1.26-1.35 V vs. Ag/AgCl in acid electrolyte consisting of acetonitrile and 4-toluene sulfonic acid (MBSA), revealed excellent stability of electrochromic characteristics with a color change from neutral yellowish pale form to the green or blue oxidized form at applied potentials ranging from -0.5 to 1.8 V. The anodically electrochromic PAA-IM films not only showed excellent reversible electrochromic stability with extremely high coloration efficiency (CE = 834 and 523 cm(2) C-1) but also exhibited fast switching speed which required 1.7 to 3.8 s for color switching and 0.8 to 1.6 s for bleaching. After over 30 cyclic switches, the PAA-IMs films still exhibited stable electrochemical and electrochromic characteristics.
机译：由两种电活性二胺，4,4'-二氨基4''-甲氧基三苯胺和4,4'-二氨基-4''-苯氧基三苯胺和均苯四甲酸二酐（PAA-IMs）制备了两种新型的聚（酰胺酸-酰亚胺）（PAA-IMs）。 PMDA），然后通过常规缩聚反应，然后在150摄氏度下部分酰亚胺化。所得的PAA-IM具有显着的热稳定性，与195至370摄氏度之间的2％失重温度相关。显示出浅色的柔性PAA-IM薄膜在涂有氧化铟锡（ITO）的玻璃基板表面上具有出色的附着力。通过电化学和光谱电化学方法检查电致变色性质。在由乙腈和4-甲苯磺酸（MBSA）组成的酸性电解液中，浇铸在ITO衬底上的PAA-IM膜的循环伏安图在1.26-1.35 V相对于Ag / AgCl表现出可逆氧化，显示出优异的电致变色特性稳定性在-0.5至1.8 V的施加电压下，颜色从中性淡黄色的淡黄色变为绿色或蓝色的氧化形式。阳极电致变色PAA-IM膜不仅显示出优异的可逆电致变色稳定性，而且着色效率极高（CE = 834和523） cm（2）C-1），但显示出快速的切换速度，彩色切换需要1.7至3.8 s，漂白需要0.8至1.6 s。经过30多次循环开关后，PAA-IMs膜仍表现出稳定的电化学和电致变色特性。

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