Rapid, homogeneous vibrational dephasing in ethanol at low temperatures determined by Raman echo measurements

Raman echo and Raman free-induction decay experiments on the broad Raman transition of the sym-methyl stretch ofethanol-1,1- d 2 were performed in the room-temperature liquid, just below the glass transition (80 K) and in the low-temperature glass (12 K). Contrary to standard theories, the dephasing...

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Bibliographic Details
Published in:Chemical physics letters 1994-10, Vol.229 (1), p.87-92
Main Authors: Bout, David Vanden, Freitas, John E., Berg, Mark
Format: Article
Language:English
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Summary:Raman echo and Raman free-induction decay experiments on the broad Raman transition of the sym-methyl stretch ofethanol-1,1- d 2 were performed in the room-temperature liquid, just below the glass transition (80 K) and in the low-temperature glass (12 K). Contrary to standard theories, the dephasing remains both rapid and homogeneous at low temperatures. We suggest that the dephasing is caused by very rapid (225–365 fs), solvent-assisted intramolecular vibrational redistribution.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(94)01013-7