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

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. Des...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2014-12, Vol.16 (48), p.26701-26706
Main Authors: Sheps, Leonid, Scully, Ashley M, Au, Kendrew
Format: Article
Language:English
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Summary: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.
ISSN:1463-9076
1463-9084
DOI:10.1039/c4cp04408h