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Novelli A, Vereecken L, Lelieveld J, et al. Direct observation of OH formation from stabilised Criegee intermediates. Phys Chem Chem Phys. 2014;16(37):19941-51doi: 10.1039/c4cp02719a.
Novelli, A., Vereecken, L., Lelieveld, J., & Harder, H. (2014). Direct observation of OH formation from stabilised Criegee intermediates. Physical chemistry chemical physics : PCCP, 16(37), 19941-51. https://doi.org/10.1039/c4cp02719a
Novelli, A, et al. "Direct observation of OH formation from stabilised Criegee intermediates." Physical chemistry chemical physics : PCCP vol. 16,37 (2014): 19941-51. doi: https://doi.org/10.1039/c4cp02719a
Novelli A, Vereecken L, Lelieveld J, Harder H. Direct observation of OH formation from stabilised Criegee intermediates. Phys Chem Chem Phys. 2014 Oct 07;16(37):19941-51. doi: 10.1039/c4cp02719a. PMID: 25119645.
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Phys Chem Chem Phys. 2014 Oct 07;16(37):19941-51. doi: 10.1039/c4cp02719a.

Direct observation of OH formation from stabilised Criegee intermediates.

Physical chemistry chemical physics : PCCP

A Novelli, L Vereecken, J Lelieveld, H Harder

Affiliations

  1. Atmospheric Chemistry Dept., Max Planck Institute for Chemistry, 55128 Mainz, Germany. [email protected].

PMID: 25119645 DOI: 10.1039/c4cp02719a

Abstract

The syn-CH3CHOO Criegee intermediate formed from the ozonolysis of propene and (E)-2-butene was detected via unimolecular decomposition and subsequent detection of OH radicals by a LIF-FAGE instrument. An observed time dependent OH concentration profile was analysed using a detailed model focusing on the speciated chemistry of Criegee intermediates based on the recent literature. The absolute OH concentration was found to depend on the steady state concentration of syn-CH3CHOO at the injection point while the time dependence of the OH concentration profile was influenced by the sum of the rates of unimolecular decomposition of syn-CH3CHOO and wall loss. By varying the most relevant parameters influencing the SCI chemistry in the model and based on the temporal OH concentration profile, the unimolecular decomposition rate k (293 K) of syn-CH3CHOO was shown to lie within the range 3-30 s(-1), where a value of 20 ± 10 s(-1) yields the best agreement with the CI chemistry literature.

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