PHOTOCHEMICAL DECOMPOSITION OF DIBENZOYL PEROXIDE AND PHENYL BENZOATEIN SOLID KBR MATRIX

Physical and photochemical properties of dibenzoyl peroxide (DBPO) and phenyl benzoate (PB) in a solid KBr matrix were investigated. The pho toinduced decompositions of DBPO and PB were monitored with infrared s pectroscopy and HPLC. The organic molecules at different locations in the matrix contribute to the overall IR absorption differently. Theref ore, they are affected differently during a photochemical decompositio n. The bromide ions in the matrix intercept some of the radical interm ediates in the decomposition of DBPO but have no influence on the radi cal pair in the rearrangement of phenyl benzoate.