ABSTRACT

A series of redox-active, fluorescent neat polyimides and copolyimides bearing unsymmetrical and noncoplanar carbazole-TPA units have been synthesized via thermal imidization methods. The copolyimides were prepared by using methylene dianiline (MDA) and carbazole-TPA-based diamine in equimolar ratios and reacted with different dianhydrides. The structures of the prepared monomer and polyimides were thoroughly characterized and their thermal, optical, fluorescence and electrochemical properties were measured using DSC, TGA, UV-Vis spectroscopy, photoluminescence spectroscopy, and cyclic voltammetry, which revealed the presence of high lying HOMO levels, blue light emission, and stable electrochemical properties.

摘要

通过热酰亚胺化方法合成了一系列带有不对称和非共平面咔唑-TPA单元的氧化还原活性，荧光纯聚酰亚胺和共聚酰亚胺。共聚酰亚胺是通过使用亚甲基二苯胺（MDA）和基于咔唑-TPA的二胺等摩尔比制备的，并与不同的二酐反应。对制备的单体和聚酰亚胺的结构进行了彻底的表征，并使用DSC，TGA，UV-Vis光谱，光致发光光谱和循环伏安法测量了它们的热，光学，荧光和电化学性质，结果表明存在高水平的HOMO，发出蓝色光，电化学性能稳定。