Photophysical and Electrochemical Properties of Thienylnaphthalimide Dyes with Excellent Photostability
作者:Takatoshi Inari、Minori Yamano、Ayaka Hirano、Kosuke Sugawa、Joe Otsuki
DOI:10.1021/jp502535n
日期:2014.7.17
thienylnaphthalimide derivatives with phenyl- (Ph-), 4-nitrophenyl- (NO2Ph-), and 4-(diphenylamino)phenyl (Ph2NPh-) substituents as exemplars covering electron-withdrawing to electron-donating groups. The fluorescence quantum yields of the Ph-TNI increases as the solvent polarity increases, while that of Ph2NPh-TNI showed the opposite trend. Changes in the rates of nonradiative decay were found to be a
鲁棒性染料的开发对于染料的任何应用都是非常重要的主题。在这里,我们介绍了基于噻吩基萘二甲酰亚胺单元的一组坚固的染料的光物理和电化学表征。该集合由具有苯基- (Ph -),4-硝基苯基-(NO 2 Ph-)和4-(二苯基氨基)苯基(Ph 2 NPh-)取代基的噻吩萘二甲酰亚胺衍生物组成,其示例涵盖了吸电子至电子-捐赠团体。Ph-TNI的荧光量子产率随着溶剂极性的增加而增加,而Ph 2的NPh-TNI呈现相反的趋势。发现非辐射衰变速率的变化是这些相反行为的主要因素。循环伏安法表明,取代基效应对于HOMO能量比LUMO能量更为明显。密度泛函理论计算表明,这些化合物的第一单重激发态是一个1个π,π*状态与显著电荷转移性质。Ph-TNI和Ph 2 NPh-TNI比香豆素和荧光素染料对光降解的稳定性更高。