Issue |
Europhys. Lett.
Volume 55, Number 3, August 2001
|
|
---|---|---|
Page(s) | 341 - 347 | |
Section | Condensed matter: structure, mechanical and thermal properties | |
DOI | https://doi.org/10.1209/epl/i2001-00421-1 | |
Published online | 01 December 2003 |
Temperature dependence of structural quantum effects in liquid methanol
1
Department of Physics, University of Guelph - Guelph,
Ontario, Canada N1G 2W1
2
IPNS Division, Argonne National Laboratory 9700
S. Cass Ave., Argonne, IL 60439, USA
3
ISIS Facility, CLRC Rutherford Appleton
Laboratory Chilton, Oxon OX11 OXQ, UK
4
Hamburger Synchrotronstrahlungslaboratorium HASYLAB
at Deutsches Elektronen Synchrtron DESY - Notkestr.
85, 22603 Hamburg, Germany
5
European Synchrotron Radiation Facility BP 220,
F-38043 Grenoble Cedex, France
Received:
4
January
2001
Accepted:
28
May
2001
High-energy electromagnetic radiation scattering techniques have
been used to measure the structural differences between liquids
composed of four different isotopes of methanol ( and
) at temperatures of
and
. We measured the
magnitude of the isotopic effect, which increases with decreasing
temperature and comprises of both intramolecular and
intermolecular effects. Intramolecularly, the C-O, O-H, and
to a lesser extent the C-H bond lengths, shorten upon
deuteration. Intermolecularly, the winding hydrogen bonded chain
structure is affected significantly. The results show that
hydrogenated simple alcohols are more disordered liquids than
deuterated alcohols at the same temperature. Substitution at the
methyl site is compared to substitution at the hydroxyl site and
the effect is shown to increase more rapidly as temperature is
decreased.
PACS: 61.20.-p – Structure of liquids / 61.25.Em – Molecular liquids / 61.10.-i – X-ray diffraction and scattering
© EDP Sciences, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.