苯甲酰基硫代苯甲酸-S-苯酯的双重磷光研究

DUAL PHOSPHORESCENCE OF BENZOYL SPHENYL THIOBENZOATES

在对不同取代的苯甲酰基硫代苯甲酸－Ｓ－苯酯的光物理性质进行研究时，发现其苯甲酰基在邻位时可观测到双磷光现象，本工作对这种现象的机理进行了研究，确定这种现象是由于溶剂的作用，使溶液中具有多种不同的构象体，不同异构体的磷光发射不同，其激发波长也不同，改变激发波长可观察到双重磷光现象．

he photophysical behavior of Sphenyl thiobenzoates with different substituents has been studied at 77 K and different results were observed. It was found that the only 2benzoyl derivative can emit dual phosphorescence. This phenomenon was caused by solvent effect. There are at least two conformational isomers existed in polar solution for 2benzoyl derivative. The peak wavelength in phosphorescence spectrum depends evidently on the excited wavelength used. 