Tropospheric and stratospheric sinks for halocarbons: Photooxidation, O(1 D) atom, and OH radical reactions
作者： R. Atkinson , G. M. Breuer , J. N. Pitts , H. L. Sandoval
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摘要: The photooxidation products of CCl4, CFCl3, CF2Cl2, and CHF2Cl at 184.9 nm have been determined to be COCl2, COFCl, COF2, respectively, with quantum yields near unity measured for CF2Cl2. same are observed the reaction Of O(1D) atoms these halocarbons. Rate constants CHF2Cl, CF2ClCF2Cl, CF2ClCFCl2, CF4, relative rate constant N2O, 1.6, 2.4, 2.65, 1.5, 2.5, 0.29, 2.8, <0.1, ≥3, except CF4 approach collision frequency. significance reactions OH radical attack as halocarbon loss processes in both troposphere stratosphere is discussed. Thus atom and/or shown major stratospheric weakly absorbing species such CHF2Cl.
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