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 under go 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 of title compounds are 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.

Key words: PHOTOSENSITIZATION, BENZENECARBOTHIOIC ACID P, PHOTOLYSIS, PHOTOINDUCED, PHENYL ESTER