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Vibrationally mediated photodissociation of nitrous acid

Holland, S. M., Stickland, R. J., Ashfold, M. N. R., Newnham, D. A. and Mills, I. (1991) Vibrationally mediated photodissociation of nitrous acid. Journal of the Chemical Society, Faraday Transactions, 87 (21). pp. 3461-3471. ISSN 0956-5000

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To link to this item DOI: 10.1039/FT9918703461


Hitherto unobserved overtone and combination bands of nitrous acid have been investigated by Fourier-transform infrared absorption spectroscopy and through the resonance enhancements they provide in the two-photon excition spectrum for forming OH(X) photofragments. Analysis of the band profiles associated with the second and third O—H stretching overtones of trans-HONO, and of the energy disposal into the OH(X) fragments resulting from two-photon dissociation mediated by these overtone levels, provide some clues as to the mechanism for intramolecular vibrational energy redistribution (IVR) within these vibrationally excited molecules. The work serves to highlight further the extreme sensitivity of vibrationally mediated photodissociation (VMP) as a means of revealing weak O—H stretching overtones, even in situations (as here) where the species of interest is but a minor constituent of an equilibrium mixture.

Item Type:Article
Divisions:Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:7437
Publisher:The Royal Society of Chemistry

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