Photochemical reactions of radical cations of dimethylformamide in freon matrices at 77 K

Article abstract of DOI:10.1007/BF02495920

Spectral characteristics of the radical cations (RC) of DMF (λ_max = 415 nm, ε_max = (2.6±0.8) · 10³ L mol^-1 cm^-1) stabilized in an irradiated glassy freon mixture (CFCl₃ and CF₂BrCF₂Br) at 77 K were determined. Amide type radicals and RC of the matrix were shown to be formed by irradiation (λ = 365-436 nm) of the radical cations of DMF in freon matrices using ESR and UV spectroscopy. The quantum yields of photoconversion of the DMF radical cations are independent of the wavelength of exciting light. It was found that the matrix structure affects the processes stabilizing the products of photoconversion of the DMF radical cations.