Photo-Tautomerization of Acetaldehyde to Vinyl Alcohol: A Potential Route to Tropospheric Acids
作者： S. H. Kable , D. U. Andrews , B. R. Heazlewood , A. T. Maccarone , T. Conroy
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摘要: Current atmospheric models underestimate the production of organic acids in troposphere. We report a detailed kinetic model photochemistry acetaldehyde (ethanal) under tropospheric conditions. The rate constants are benchmarked to collision-free experiments, where extensive photo-isomerization is observed upon irradiation with actinic ultraviolet radiation (310 330 nanometers). quantitatively reproduces experiments and shows unequivocally that keto-enol photo-tautomerization, forming vinyl alcohol (ethenol), crucial first step. When collisions at pressure included, previously reported quantum yields for photodissociation all pressures wavelengths. also predicts 21 ± 4% initially excited forms stable alcohol, known precursor acid formation, which may help account
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