Study on the synthesis and structure-effect relationship of multi-aryl imidazoles with their fluorescence properties
作者:Mi Tian、Chao Wang、LiGong Wang、Kai Luo、An Zhao、CanCheng Guo
DOI:10.1002/bio.2580
日期:2014.8
In this paper, 23 multi-aryl imidazole derivatives were synthesized and identified by nuclear magnetic resonance, ultraviolet-visible and elemental analysis. At the same time, their ultraviolet-visible maximum absorption (λabmax), fluorescence emission maximum (λemmax) and quantum yields (Фf) were measured. The relationships between the optical behaviors and structures for these compounds were assessed. The results show that the λmaxab and λmaxem are red-shifted and the fluorescence Фf are increased by the introduction of electron-withdrawing substituents and the increase in the planarity of multi-aryl imidazole molecules. The results also showed that the fluorescence quantum yields of the compounds containing two imidazole nuclei are double the corresponding mono-imidazole nucleus compounds. Copyright © 2013 John Wiley & Sons, Ltd.
在本论文中,合成了23种多芳基咪唑衍生物并通过核磁共振、紫外-可见光谱和元素分析进行了鉴定。同时,测量了它们的紫外-可见最大吸收(λabmax)、荧光发射最大值(λemmax)和量子产率(Фf)。评估了这些化合物的光学行为与结构之间的关系。结果表明,通过引入吸电子取代基和增加多芳基咪唑分子的平面性,λmaxab和λmaxem发生红移,荧光Фf增加。结果还显示,含有两个咪唑核的化合物的荧光量子产率是对应的单咪唑核化合物的两倍。版权所有 © 2013 John Wiley & Sons, Ltd。