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@ARTICLE{Garberoglio:24566,
author = {Garberoglio, G. and Vallauri, R. and Sutmann, G.},
title = {{I}nstantaneous normal mode analysis of correlated cluster
motions in hydrogen bonded liquids},
journal = {The journal of chemical physics},
volume = {117},
issn = {0021-9606},
address = {Melville, NY},
publisher = {American Institute of Physics},
reportid = {PreJuSER-24566},
pages = {3278 - 3288},
year = {2002},
note = {Record converted from VDB: 12.11.2012},
abstract = {We analyze the correlated motions of hydrogen bonded
clusters in liquid hydrogen fluoride, methanol, and water
using the Instantaneous Normal Mode approach. In the case of
hydrogen fluoride and methanol, which form a topologically
linear hydrogen bond network, the relevant cluster is a
triplet formed by a molecule and its two neighbors. In the
case of water, whose hydrogen bond structure has a local
tetrahedral symmetry, the basic unit considered is the
pentamer formed by a molecule and its four neighbors. For
each of these clusters we identify, using symmetry
arguments, the a priori modes describing the relative
motions of the cluster molecules and introduce suitable
projections in order to evaluate how much these modes
contribute to the actual motions at different frequencies.
In the case of hydrogen fluoride we confirm the assignment
of a 50 rad/ps peak observed in the single and collective
correlation function spectra to the stretching of the
hydrogen bonded network. In the case of methanol the
analysis of the correlated motions of the triplets shows
that in the intermediate frequency range (around 25 rad/ps)
a picture similar to what is observed in hydrogen fluoride
applies, whereas the high frequency properties of the liquid
(beyond 50 rad/ps) are mostly due to the asymmetric
stretching motion. In the case of water we demonstrate that
the a priori modes, based on the full tetrahedral symmetry
of the water pentamer, do indeed mix strongly under the
effect of the interaction with the neighbors. The results
are related to the spectroscopic measurement. (C) 2002
American Institute of Physics.},
keywords = {J (WoSType)},
cin = {ZAM},
ddc = {540},
cid = {I:(DE-Juel1)VDB62},
pnm = {Methoden und Systeme der Informationstechnik},
pid = {G:(DE-Juel1)FUEK253},
shelfmark = {Physics, Atomic, Molecular $\&$ Chemical},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000177202300034},
doi = {10.1063/1.1493775},
url = {https://juser.fz-juelich.de/record/24566},
}