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Vibrational predissociation in hydrogen-bonded OH…O complexes via OH stretch-OO stretch energy transfer

✍ Scribed by Arnulf Staib; James T. Hynes

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 817 KB
Volume: 204
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(93)85627-z

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✦ Synopsis

A theory for vibrational predissociation of hydrogen-bonded OH...0 complexes via OH stretch-00 stretch energy transfer is constructed, motivated by a recent experiment on vibrational predissociation of hydrogen-bonded ethanol dimer in solution. The theory employs a vibrationally adiabatic perspective, exploiting the frequency separation between the OH and 00 stretches. The nonadiabatic coupling responsible for the hydrogen bond rupture subsequent to OH stretch excitation is found analytically. A lifetime for ethanol dimer of % 10 ps is estimated, which is within a factor of two of the experimental result. General trends are predicted and discussed for other OH...0 complexes.

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