OH/OD initiated oxidation of isoprene in the presence of O-2 and NO Academic Article

abstract

• The kinetics of the isoprene-OH/OD reaction in the presence of O 2: and NO have been studied using laser photolysis/laser-induced fluorescence. We report pressure and temperature-dependent rate constants for the addition of OH/OD to isoprene are in good agreement with previous studies. On the basis of simulations to OH cycling curves, we find a value of (9.0 3.0) 10-12 molecule-1 cm3 s-1 for the overall reaction rate constant of hydroxy peroxy radical with NO at 298 K. We report a rate constant for O2 addition to the hydroxy alkyl radical of (2.3 2.0) 10-12 molecule-1 cm3 s-1 at 298 K. We find little generation of OH from the OD initiated oxidation of isoprene, and no significant differences in OH and OD cycling, suggesting that H-shift isomerization is the major pathway for -hydroxy alkoxy radicals, in agreement with theoretical predictions.

authors

• North, Simon
• Zhang, Renyi

published proceedings

• JOURNAL OF PHYSICAL CHEMISTRY A

author list (cited authors)

• Park, J., Jongsma, C. G., Zhang, R. Y., & North, S. W.

citation count

• 58

complete list of authors

• Park, J||Jongsma, CG||Zhang, RY||North, SW

publication date

• December 2004

publisher

• American Chemical Society (ACS)  Publisher

published in

• The Journal of Physical Chemistry A: Isolated Molecules, Clusters, Radicals, and Ions; Environmental Chemistry, Geochemistry, and Astrochemistry; Theory  Journal

keywords

• 34 Chemical Sciences
• 3406 Physical Chemistry
• 51 Physical Sciences
• 5102 Atomic, Molecular And Optical Physics

Digital Object Identifier (DOI)

• 10.1021/jp040421t

start page

• 10688

end page

• 10697

volume

• 108

issue

• 48

URL

• http%3A%2F%2Fdx.doi.org%2F10.1021%2Fjp040421t