Photochemistry and absorption cross-sections temperature dependence of trifluoromethoxycarbonyl peroxy nitrate (CF3OC(O)O2NO2).

F. E. MALANCA*, M. D. MANETTI, M. S. CHIAPPERO, P. GALLAY AND G. A. ARGÜELLO

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

ELSEVIER SCIENCE SA

Año: 2009 vol. 205 p. 44 - 50

1010-6030

The photochemical rupture of CF3OC(O)OONO2 at 254 nm leads to the formation of NO2 +CF3OC(O)OO,andNO3 +CF3OC(O)O radicals. The study carried out at 297, 273 and 253K leads to a quantum yield NO3=0.18 ± 0.03, and NO2+ NO3= 1.01 ± 0.09. To minimize the errors in both the determination of quantumyields and the analysis of atmospheric photochemical lifetimes, the study of the absorption cross-sectionsdependence with temperature between 297 and 245K was undertaken. There is a clear increase of thecross-sections with temperature. The atmospheric photochemical lifetime of CF3OC(O)OONO2 and itscomparison with thermal decomposition are presented.