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Evidence for formation of OH radicals from the reaction of O 3 with alkenes in the gas phase
Author(s) -
Paulson Suzanne E.,
Sen Atish D.,
Liu Ping,
Fenske Jill D.,
Fox Matthew J.
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl03163
Subject(s) - tracer , alkene , radical , chemistry , reaction rate constant , gas phase , fraction (chemistry) , phase (matter) , chemical reaction , organic chemistry , kinetics , nuclear physics , catalysis , physics , quantum mechanics
A series of experiments investigating the formation of OH radicals from O 3 ‐alkene reactions are described. Pairs of OH tracer compounds—aromatic and aliphatic hydrocarbons—were added to O 3 ‐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 O 3 reaction with alkenes.
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