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Issue 18, 2012
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Ultrafast vibrational energy relaxation of the water bridge

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Abstract

We report the energy relaxation of the OH stretch vibration of HDO molecules contained in an HDO:D2O water bridge using femtosecond mid-infrared pump–probe spectroscopy. We found that the vibrational lifetime is shorter (∼630 ± 50 fs) than for HDO molecules in bulk HDO:D2O (∼740 ± 40 fs). In contrast, the thermalization dynamics following the vibrational relaxation are much slower (∼1.5 ± 0.4 ps) than in bulk HDO:D2O (∼250 ± 90 fs). These differences in energy relaxation dynamics strongly indicate that the water bridge and bulk water differ on a molecular scale.

Graphical abstract: Ultrafast vibrational energy relaxation of the water bridge

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Article information


Submitted
20 Jul 2011
Accepted
16 Sep 2011
First published
13 Oct 2011

Phys. Chem. Chem. Phys., 2012,14, 6160-6164
Article type
Paper

Ultrafast vibrational energy relaxation of the water bridge

L. Piatkowski, A. D. Wexler, E. C. Fuchs, H. Schoenmaker and H. J. Bakker, Phys. Chem. Chem. Phys., 2012, 14, 6160
DOI: 10.1039/C1CP22358E

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