Issue 48, 2014

UV absorption probing of the conformer-dependent reactivity of a Criegee intermediate CH3CHOO

Abstract

We measure the UV absorption spectrum of a Criegee intermediate acetaldehyde oxide, CH3CHOO, using time-resolved broadband cavity-enhanced spectrometry. We separate the spectra of the two possible structural isomers, syn- and anti-CH3CHOO, based on their different reactivity towards H2O and SO2. Despite significant overlap, the spectra of the two conformers are sufficiently separated to allow direct conformer-specific probing of the reactions of CH3CHOO with other important tropospheric species.

Graphical abstract: UV absorption probing of the conformer-dependent reactivity of a Criegee intermediate CH3CHOO

Supplementary files

Article information

Article type
Communication
Submitted
29 Sep 2014
Accepted
28 Oct 2014
First published
04 Nov 2014

Phys. Chem. Chem. Phys., 2014,16, 26701-26706

Author version available

UV absorption probing of the conformer-dependent reactivity of a Criegee intermediate CH3CHOO

L. Sheps, A. M. Scully and K. Au, Phys. Chem. Chem. Phys., 2014, 16, 26701 DOI: 10.1039/C4CP04408H

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