取代苯基重氮盐的直接光解和敏化光解的研究

本工作合成了一系列带取代基的苯基重氨盐化合物。对它们的直接光解研究表明:带推电子基的重氮盐化合物具有较高的光解反应速度,但在敏化光解研究中发现:带有拉电子基的重氟盐化合物,不论是它的敏化光解或是猝灭敏化剂荧光的能力都较带推电子基的重氮盐为强,这清晰地表明,此敏化过程是通过电子转移反应而实现的。工作中还发现,在基态条件下,重氮盐和N,N-二甲基苯胺间可生成电荷转移络合物(CTC),经Benesi-Hildebrand公式处理表明:可形成1:1的CTC。

STUDY ON THE DIRECT PHOTOLYSIS AND SENSITIZED PHOTOLYSIS OF SUBSTITUTED PHENYL DIAZONIUM SALTS

In this work, a series of substituted phenyl diazonium salts have been synthesized. Results in the direct photolysis indicated that the diazonium salt with electron-repulsive group possesses higher rate of photolysis reaction. But in the sensitized photolysis it was found that the diazonium salts which contain electron-withdrawing group possess stronger abilities than that with electron-repulsive group either in the sensitized photolysis or in the process of fluorescence quenching of sensitizers. It indicated evidently that the process of sensitization was realized by the reaction of electron transfer. It was also found it this work that the charge transfer complex (CTC) between diazonium salts and N,N-dimethyl aniline can be formed in the ground state. According to the results obtained from the Benesi-Hildebrand equation, the formed complex was the 1:1 charge transfer complex.