HOx radical regeneration in the oxidation of isoprene

We propose, and quantify from first principles, two novel HO(x)-regenerating unimolecular reactions in isoprene oxidation, which are estimated to yield in pristine tropical forest conditions about 0.7 HO(2) and 0.03 OH radicals per isoprene oxidized; it is further argued that the photolabile coprodu...

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Published inPhysical chemistry chemical physics : PCCP Vol. 11; no. 28; pp. 5935 - 5939
Main Authors PEETERS, J, NGUYEN, T. L, VEREECKEN, L
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 01.01.2009
Subjects
Butadienes - chemistry
Butadienes - metabolism
Chemistry
Exact sciences and technology
General and physical chemistry
Hemiterpenes - chemistry
Hemiterpenes - metabolism
Hydroxides - chemistry
Oxidation-Reduction
Pentanes - chemistry
Pentanes - metabolism
Trees - chemistry
Water - chemistry
Regeneration
Oxidation
Isoprene
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Summary:We propose, and quantify from first principles, two novel HO(x)-regenerating unimolecular reactions in isoprene oxidation, which are estimated to yield in pristine tropical forest conditions about 0.7 HO(2) and 0.03 OH radicals per isoprene oxidized; it is further argued that the photolabile coproduct of HO(2) can be a major source of OH, with a yield of the order of 1. The newly proposed chemistry could provide a rationalization for the unexpectedly high OH concentrations often observed in forested environments, such as over the Amazon forest in the recent Gabriel campaign.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:1463-9076
1463-9084
DOI:10.1039/b908511d