PHOTOCHEMICAL-REACTIONS OF RADICAL CATIONS OF DIMETHYLFORMAMIDE IN FREON MATRICES AT 77 K

Spectral characteristics of the radical cations (RC) of DMF (lambda(ma x) = 415 nm, epsilon(max) = (2.6+/-0.8).10(3) L mol(-1) cm(-1)) stabil ized in an irradiated glassy freon mixture (CFCl3 and CF2BrCF2Br) at 7 7 K were determined. Amide type radicals and RC of the matrix were sho wn to be formed by irradiation (lambda = 365-436 nm) of the radical ca tions of DMF in freon matrices using ESR and UV spectroscopy. The quan tum yields of photoconversion of the DMF radical cations are independe nt of the wavelength of exciting light. It was found that the matrix s tructure affects the processes stabilizing the products of photoconver sion of the DMF radical cations.