The Reactions of Sulfuric Acid with Biogenic Criegee Intermediates or Secondary Ozonides as a Possible Source of Nucleation Precursors

  • Theo Kurtén
  • Boris Bonn
  • Hanna Vehkamäki
  • Markku Kulmala

We have studied the reactions of sulfuric acid with stabilized Criegee Intermediates (sCIs) and secondary ozonides formed in the ozonolysis of biogenic mono- and sesquiterpenes. Activation energy calculations on model species show that the reaction between sulfuric acid and sCIs is almost barrierless. If the lifetime of biogenic sCIs in the atmosphere is sufficiently long for them to undergo bimolecular reactions, then the sCI plus sulfuric acid reaction could account some part of the organically assisted new-particle formation events observed in the atmosphere. If, on the other hand, unimolecular formation of secondary ozonides is the main sink reaction of sCIs, then the reactions between sulfuric acid and the secondary ozonides could be of atmospheric importance. For the secondary ozonide formed from a-pinene, we have found a strongly exothermic reaction which results in the formation of a sulfuric acid monoester plus a water molecule. However, this reaction may have high activation energy.

Keywords Nucleation, sulfuric acid, Criegee intermediate, secondary ozonide, quantum chemistry


Sulfuric Acid Bimolecular Reaction Standard Gibbs Free Energy Sulfuric Acid Ester Activation Energy Calculation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer 2007

Authors and Affiliations

  • Theo Kurtén
    • 1
  • Boris Bonn
    • 1
  • Hanna Vehkamäki
    • 1
  • Markku Kulmala
    • 1
  1. 1.Department of Physical SciencesUniversity of HelsinkiFinland

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