Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5376061 | Chemical Physics | 2008 | 9 Pages |
Abstract
First overtone (2νOH) transitions of the two OH-stretching modes in isolated 2,2,2-trifluoroethanol dimers are observed for the first time. Their relative intensities provide quantitative evidence for the pronounced IR intensity suppression of two-quantum hydrogen-bonded OH-stretching excitations relative to fundamental transitions by up to three orders of magnitude. The OH anharmonicity is shown to increase by 15% upon hydrogen bonding to another oxygen, whereas it remains constant upon hydrogen bonding to a fluorine atom. The experimental results are supported by reduced-dimensionality anharmonic calculations in up to three dimensions.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Tina Scharge, David Luckhaus, Martin A. Suhm,