硫代苯甲酸-S-苯酯敏化光解的研究

A Study on the Sensitized Photolysis of S-Phenyl Thiobenzoates

本文对硫代苯甲酸-S-苯酯类化合物的敏化光解反应进行了研究,以图扩大其光谱响应范围.工作表明硫代苯甲酸-S-苯酯能与芘、(艹北)等敏化剂发生电子转移反应,并进而促使硫代苯甲酸-S-苯酯分子裂解,产生各种分解产物;气相色谱-质谱联用仪分析结果表明,敏化光解产物主要为苯甲醛和二苯基二疏醚,在此基础上对标题化合物敏化光解的机制提出了看法.此外,从该光敏体系能引发甲基丙烯酸甲酯聚合进一步表明,硫代苯甲酸-S-苯酯能与适宜的电子给体组成光敏引发体系,使该体系的光敏引发可用波长扩展到400nm以上.

The sensitized photofragmentation reaction of S-phenyl thiobenzoates was studied in this paper in order to extend the range of spectral response. The results showed that S-phenyl thiobenzoates were able to undergo photoinduced electron transfer reaction with different sensitizers such as pyrene, perylene etc., leading to cleavage of S-phenyl thiobenzoates as well as production of various fragmental products. The results from GC-MS indicated that the main products obtained from photolysis were benzaldehyde and diphenyl disulfide. On the basis of these results, the mechanism of sensitized photolysis of title compounds was proposed; Moreover, the fact that this system is capable of initiating the polymerization of methyl methacrylate confirmed that S-phenyl thiobenzoates were able to form the photo-sensitization system with proper electron donation compounds which enables the extension of the availabe wavelength beyond 400nm.