TERAHERTZ VIBRATION-ROTATION-TUNNELING SPECTROSCOPY OF WATER CLUSTERS IN THE TRANSLATIONAL BAND REGION

We report the first direct observation of the hydrogen-bond stretching vibration for a water cluster. A perpendicular band of $(D 2 O) 3$ was measured by terahertz laser vibration- rotation-tunneling spectroscopy at $142.8 c m −1$ in the ``translational band'' region of the liquid corresponding to the hindered translational motions of water molecules. We have tentatively assigned the spectrum to transitions from the vibrational ground state to the degenerate hydrogen-bond stretch or a combination or mixed state of the degenerate stretch and a torsional $v i b r a t i o n . a$ Comparison with theoretical results shows that calculated frequencies are much too high, presumably because they do not include coupling between the torsional and stretching vibrations.

Description

$a$ F. N. Keutsch, M. G. Brown, P. B. Petersen, and R. J. Saykally, M. Geleijns, and A. van der Avoird J. Chem. Phys. 114 (9), 3994 February (2001).

Author Institution: Harvard University; Department of Chemistry, University of Oregon; Department of Chemistry, University of California; Department of Chemistry, University of California; Department of Chemistry, University of Nijmegen; Institute of Theoretical Chemistry, NSR-Center, University of Nijmegen

URI

http://hdl.handle.net/1811/20017

Collections

Abstracts of OSU International Symposium on Molecular Spectroscopy 2000-2009

Full item page

Knowledge Bank