Kinetics and Mechanism of the Photodecomposition
of Trifluorobromomethane and Tetrafluorodibromoethane
under
the Action of Light with a Wavelength of 253.7 nm

I. K. Larin, T. I. Belyakova, N. A. Messineva, A. I. Spasskii, and E. M. Trofimova

Institute of Energy Problems of Chemical Physics, Moscow, 117829 Russia

e-mail: iklarin@yandex.ru, messineva@chph.ras.ru

Received May 31, 2010

Abstract—The kinetics of photodecomposition of Halons CF₃Br and C₂F₄Br₂ was studied at different times of
the irradiation of a mixture of these substances with oxygen at the wavelength = 253.7 nm. Kinetic data were
obtained from changes in the absorption spectra in the region of Halon absorption and at a wavelength of 416
nm, which corresponds to the absorption maximum of molecular bromine. Kinetic schemes were proposed for
the photodecomposition of CF₃Br and C₂F₄Br₂ at = 253.7 nm, and the quantum yields of their photodecom-
position at this wavelength were determined.

DOI: 10.1134/S0023158411040070

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