A product study of the isoprene+NO3 reaction
Item
Title (Dublin Core)
A product study of the isoprene+NO3 reaction
Description (Dublin Core)
Oxidation of isoprene through reaction with NO<sub>3</sub> radicals is a significant sink for isoprene that persists after dark. The main products of the reaction are multifunctional nitrates. These nitrates constitute a significant NO<sub>x</sub> sink in the nocturnal boundary layer and they likely play an important role in formation of secondary organic aerosol. Products of the isoprene+NO<sub>3</sub> reaction will, in many locations, be abundant enough to affect nighttime radical chemistry and to persist into daytime where they may represent a source of NO<sub>x</sub>. Product formation in the isoprene + NO<sub>3</sub> reaction was studied in a smog chamber at Purdue University. Isoprene nitrates and other hydrocarbon products were observed using Proton Transfer Reaction-Mass Spectrometry (PTR-MS) and reactive nitrogen products were observed using Thermal Dissociation–Laser Induced Fluorescence (TD-LIF). The organic nitrate yield is found to be 65±12% of which the majority was nitrooxy carbonyls and the combined yield of methacrolein and methyl vinyl ketone (MACR+MVK) is found to be ∼10%. PTR-MS measurements of nitrooxy carbonyls and TD-LIF measurements of total organic nitrates agreed well. The PTR-MS also observed a series of minor oxidation products which were tentatively identified and their yields quantified These other oxidation products are used as additional constraints on the reaction mechanism.
Creator (Dublin Core)
Perring, A. E.
Wisthaler, A.
Graus, M.
Wooldridge, P. J.
Lockwood, A. L.
Mielke, L. H.
Shepson, P. B.
Hansel, A.
Cohen, R. C.
Date (Dublin Core)
2018-01-15
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-9-4945-2009
https://acp.copernicus.org/articles/9/4945/2009/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
