Kinetic origin of the ozone isotope effect: a critical analysis of enrichments and rate coefficients - Sorbonne Université
Journal Articles Physical Chemistry Chemical Physics Year : 2001

Kinetic origin of the ozone isotope effect: a critical analysis of enrichments and rate coefficients

Jürgen Guenther
  • Function : Author
Konrad Mauersberger
  • Function : Author
Dieter Krankowsky
  • Function : Author

Abstract

The oxygen isotope anomaly in ozone was Ðrst identiÐed in isotopomers and with enrichments of 49O 3 50O 3 over 10%. Recent rate coefficient measurements imply a new interpretation of the anomaly. The large variability of the rate coefficients of ozone formation of about 50% characterizes the ozone O ] O 2 ] O 3 isotope e †ect and demonstrates its kinetic origin. Surprisingly, the rate coefficients correlate with the zero-point energy change of the oxygen molecules participating in the isotope exchange reactions but not with the mass of the ozone molecules. Rate coefficients of symmetric molecules depart from this linear relationship by about 20%.

Dates and versions

hal-03606344 , version 1 (16-02-2023)

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Jürgen Guenther, Konrad Mauersberger, Dieter Krankowsky, Christof Janssen. Kinetic origin of the ozone isotope effect: a critical analysis of enrichments and rate coefficients. Physical Chemistry Chemical Physics, 2001, 3, pp.4718 - 4721. ⟨10.1039/b107171h⟩. ⟨hal-03606344⟩
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