Evidence for formation of OH radicals from the reaction of O3 with alkenes in the gas phase

Details Evidence for formation of OH radicals from the reaction of O3 with alkenes in the gas phase Evidence for formation of OH radicals from the reaction of O3 with alkenes in the gas phase

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.3193p&link_type=abstract

Geophysical Research Letters, Volume 24, Issue 24, p. 3193-3196

Physics

17

Atmospheric Composition And Structure: Troposphere-Composition And Chemistry, Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties, Atmospheric Composition And Structure: Pollution-Urban And Regional

Scientific paper

A series of experiments investigating the formation of OH radicals from O3-alkene reactions are described. Pairs of OH tracer compounds-aromatic and aliphatic hydrocarbons-were added to O3-alkene mixtures in small quantities. Under these conditions, a large fraction of the tracer is consumed, resulting in a much larger signal than in experiments using excess tracer. The average decay ratios of tracer pairs in 30 experiments were within 7% of those predicted by literature rate constants for tracer-OH reactions, strongly supporting the hypothesis that OH is formed directly from O3 reaction with alkenes.

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