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Conformational dependence of intramolecular vibrational redistribution in methanol

J. Chem. Phys. 126, 044311 (2007); doi:10.1063/1.2431367

Published 26 January 2007

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Pavel Maksyutenko, Oleg V. Boyarkin, and Thomas R. Rizzo
Laboratoire de Chimie Physique Moléculaire, Ecole Polytechnique Fédérale de Lausanne, Station 6, CH-1015 Lausanne, Switzerland

David S. Perry
Department of Chemistry, The University of Akron, Akron, Ohio 44325-3601
Previous state-selected spectra of methanol in the 5nu1 OH stretch overtone region [O. V. Boyarkin, T. R. Rizzo, and D. S. Perry, J. Chem. Phys. 110, 11346 (1999)] revealed a structure indicating an intramolecular vibrational redistribution on three time scales. Whereas in that work, methanol in the 5nu1 bright state was prepared close to the staggered conformation, methanol in the “partially eclipsed” conformation is prepared here by double resonance excitation through a torsionally excited intermediate state. The excited molecules are detected by infrared laser assisted photofragment spectroscopy. In partially eclipsed methanol, the strong coupling of the nu1 OH stretch to the nu2 CH stretch becomes weaker, but the coupling responsible for the widths of the narrowest features becomes stronger. ©2007 American Institute of Physics
History: Received 13 November 2006; accepted 11 December 2006; published 26 January 2007
Permalink: http://link.aip.org/link/?JCPSA6/126/044311/1
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KEYWORDS and PACS

Keywords
PACS
  • 33.80.Gj
    Diffuse molecular spectra; predissociation, photodissociation
  • 33.15.Bh
    General molecular conformation and symmetry; stereochemistry
  • 33.15.Mt
    Molecular rotation, vibration, and vibration-rotation constants
  • 33.20.Ea
    Infrared molecular spectra
  • YEAR: 2007

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PUBLICATION DATA

ISSN:
0021-9606 (print)   1089-7690 (online)
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REFERENCES (27)
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