Jump to main content
Jump to site search

Volume 130, 2005
Previous Article Next Article

Kinetic and mechanistic studies of the recombination of OH with NO2: Vibrational deactivation, isotopic scrambling and product isomer branching ratios

Author affiliations

Abstract

The kinetics and mechanism of the three-body recombination of OH with NO2 were studied using a pulsed laser photolysis – pulsed laser induced fluorescence technique. The rate coefficients for deactivation of vibrationally excited OH (v = 1–5) by NO2 were found to be independent of vibrational level with a value of (6.4 ± 0.3) × 10−11 cm3 molecule−1 s−1 at 298 K. The rate coefficient for reaction of 18OH with NO2 was measured and found to be much faster than for unlabeled OH with a “zero pressure” rate of 1 × 10−11 cm3 molecule−1 s−1 at 298 K and 273 K. Observation of temporal profiles of 16OH and 18OH suggest that isotopic scrambling in the initially formed [H18ON16O2] complex is complete on the microsecond time scale of our experiments. The rate coefficient for reaction of unlabeled OH with NO2 was measured at 413 K in 400 Torr of He. Biexponential temporal profiles were obtained and are consistent with a 10 ± 3% yield of the weakly bound HOONO isomer.

Back to tab navigation

Publication details

The article was received on 16 Nov 2004, accepted on 17 Jan 2005 and first published on 12 May 2005


Article type: Paper
DOI: 10.1039/B417458P
Citation: Faraday Discuss., 2005,130, 111-123
  •   Request permissions

    Kinetic and mechanistic studies of the recombination of OH with NO2: Vibrational deactivation, isotopic scrambling and product isomer branching ratios

    L. D’Ottone, D. Bauer, P. Campuzano-Jost, M. Fardy and A. J. Hynes, Faraday Discuss., 2005, 130, 111
    DOI: 10.1039/B417458P

Search articles by author

Spotlight

Advertisements