可溶性聚苯胺衍生物的紫外可见光谱研究

研究了POT、PDMAn、PmClAn、PAn几种聚苯胺及其衍生物的电子光谱，讨论了环取代基和掺杂对紫外可见光谱吸收峰的影响，并从高分子链结构的变化及轨道能级进行解释。研究结果表明环取代基的体积加大，数量增加，电负性增强将使有效共轭长度变短，紫外光谱中吸收峰蓝移.而质子酸掺杂后分子链中形成半醌式自由基阳离子，电活性大大提高，紫外可见光谱吸收峰也将发生变化。

Studies on UV-Vis Spectra of Soluble Polyaniline and its Derivative

By comparing the absorption band and its displacement in UV Vis spectra of polyaniliines such as POT, PDMAn, PmClAm and PAn, it was found that the ring substituted groups and proton doping have great influence on the elect r ical properties of the polymers. The influences are explained in terms of the ch anges of macromolecular chain structure and orbital energy. The results show tha t an increase in the bulk or number of subtituted groups, or electron don ating and withdrawing toning up, would bring about shortening in the effective c onjugate length. And after protondoping, the macromolecular chain formed semiqui noid free radical cations, hence the electroactivity of polymers increased evide ntly, and the absorption wavelength displaced in UV Vis spectra.