suggested a negligible contribution of charge transfer to the optical properties and more planar excited states. The pyrene containing imidazoles showed higher decomposition temperature when compared to the analogous compounds bearing anthracene. Electrochemical data revealed that the pyrene based imidazoles are electron rich than the corresponding anthracene analogs as indicated by their facile oxidation
合成了一系列含
蒽和pyr的
咪唑衍
生物,并通过光谱进行了表征。在不同极性的不同溶剂中检查了
咪唑衍
生物的光吸收和发射性质。随着溶剂极性的增加,吸收曲线保持不变,而发射最大值逐渐红移。发射光谱的溶剂变色位移与E T相关(30),取向极化率和Kamlet-Taft。Kamlet-Taft治疗获得更好的相关性,表明在激发态中涉及非特异性相互作用。TDDFT计算结果表明电荷转移对光学特性和更多平面激发态的贡献可忽略不计。与带有
蒽的类似化合物相比,含pyr的
咪唑显示出更高的分解温度。电
化学数据表明,based基
咪唑比相应的
蒽类似物富电子,如其容易氧化所示。