Back to Search Start Over

Ultrafast vibrational energy flow in water monomers in acetonitrile.

Authors :
Dahms, Fabian
Costard, Rene
Nibbering, Erik T.J.
Elsaesser, Thomas
Source :
Chemical Physics Letters. May2016, Vol. 652, p50-55. 6p.
Publication Year :
2016

Abstract

Vibrational relaxation of the OH stretching and bending modes of water monomers in acetonitrile is studied by two-color pump–probe experiments in a frequency range from 1400 to 3800 cm −1 . Measurements with resonant infrared excitation reveal vibrational lifetimes of 6.4 ± 1.0 ps of the OH stretching modes and 4.0 ± 0.5 ps of the OH bending mode. After OH stretching excitation, the OH bending mode shows an instantaneous response, a hallmark of the anharmonic coupling of stretching and bending modes, and a delayed population buildup by relaxation of the stretching via the bending mode. The relaxation steps are discussed within the framework of current theoretical pictures of water’s vibrational relaxation. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00092614
Volume :
652
Database :
Academic Search Index
Journal :
Chemical Physics Letters
Publication Type :
Academic Journal
Accession number :
115337732
Full Text :
https://doi.org/10.1016/j.cplett.2016.04.028