Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 5.414
IF5.414
IF 5-year value: 5.958
IF 5-year
5.958
CiteScore value: 9.7
CiteScore
9.7
SNIP value: 1.517
SNIP1.517
IPP value: 5.61
IPP5.61
SJR value: 2.601
SJR2.601
Scimago H <br class='widget-line-break'>index value: 191
Scimago H
index
191
h5-index value: 89
h5-index89
Volume 9, issue 14
Atmos. Chem. Phys., 9, 4945–4956, 2009
https://doi.org/10.5194/acp-9-4945-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
Atmos. Chem. Phys., 9, 4945–4956, 2009
https://doi.org/10.5194/acp-9-4945-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  24 Jul 2009

24 Jul 2009

A product study of the isoprene+NO3 reaction

A. E. Perring1,*, A. Wisthaler2,*, M. Graus2, P. J. Wooldridge1, A. L. Lockwood4, L. H. Mielke4, P. B. Shepson3,4, A. Hansel2, and R. C. Cohen1,5 A. E. Perring et al.
  • 1Department of Chemistry, University of California Berkeley, Berkeley, CA, USA
  • 2Institut fuer Ionenphysik und Angewandte Physik, University of Innsbruck, Innsbruck, Austria
  • 3Purdue Climate Change Research Center, Purdue University, West Lafayette, IN, USA
  • 4Department of Chemistry, Purdue University, West Lafayette, IN, USA
  • 5Department of Earth and Planetary Sciences, University of California Berkeley, Berkeley, CA, USA
  • *equally contributing first authors

Abstract. Oxidation of isoprene through reaction with NO3 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 NOx sink in the nocturnal boundary layer and they likely play an important role in formation of secondary organic aerosol. Products of the isoprene+NO3 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 NOx. Product formation in the isoprene + NO3 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.

Publications Copernicus
Download
Citation
Altmetrics
Final-revised paper
Preprint