Nonstatistical behavior of reactive scattering in the 18O+ 32O2 isotope exchange reaction

Annalise L. Van Wyngarden, Kathleen A. Mar, Kristie A. Boering, Jim J. Lin, Yuan T. Lee, Shi Ying Lin, Hua Guo, G. Lendvay

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The recombination of oxygen atoms with oxygen molecules to form ozone exhibits several strange chemical characteristics, including unusually large differences in formation rate coefficients when different isotopes of oxygen participate. Purely statistical chemical reaction rate theories cannot describe these isotope effects, suggesting that reaction dynamics must play an important role. We investigated the dynamics of the 18O + 32O 2 → O3* → 16O + 34O2 isotope exchange reaction (which proceeds on the same potential energy surface as ozone formation) using crossed atomic and molecular beams at a collision energy of 7.3 kcal mol-1, providing the first direct experimental evidence that the dissociation of excited ozone exhibits significant nonstatistical behavior. These results are compared with quantum statistical and quasi-classical trajectory calculations in order to gain insight into the potential energy surface and the dynamics of ozone formation.

Original languageEnglish
Pages (from-to)2866-2870
Number of pages5
JournalJournal of the American Chemical Society
Volume129
Issue number10
DOIs
Publication statusPublished - Mar 14 2007

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Ozone
Isotopes
Ion exchange
Scattering
Potential energy surfaces
Oxygen
Oxygen Isotopes
Atomic beams
Molecular beams
Genetic Recombination
Reaction rates
Chemical reactions
Trajectories
Atoms
Molecules

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Nonstatistical behavior of reactive scattering in the 18O+ 32O2 isotope exchange reaction. / Van Wyngarden, Annalise L.; Mar, Kathleen A.; Boering, Kristie A.; Lin, Jim J.; Lee, Yuan T.; Lin, Shi Ying; Guo, Hua; Lendvay, G.

In: Journal of the American Chemical Society, Vol. 129, No. 10, 14.03.2007, p. 2866-2870.

Research output: Contribution to journalArticle

Van Wyngarden, AL, Mar, KA, Boering, KA, Lin, JJ, Lee, YT, Lin, SY, Guo, H & Lendvay, G 2007, 'Nonstatistical behavior of reactive scattering in the 18O+ 32O2 isotope exchange reaction', Journal of the American Chemical Society, vol. 129, no. 10, pp. 2866-2870. https://doi.org/10.1021/ja0668163
Van Wyngarden, Annalise L. ; Mar, Kathleen A. ; Boering, Kristie A. ; Lin, Jim J. ; Lee, Yuan T. ; Lin, Shi Ying ; Guo, Hua ; Lendvay, G. / Nonstatistical behavior of reactive scattering in the 18O+ 32O2 isotope exchange reaction. In: Journal of the American Chemical Society. 2007 ; Vol. 129, No. 10. pp. 2866-2870.
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