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The effect of hydrogen bonding on torsional dynamics: A combined far-infrared jet and matrix isolation study of methanol dimer.

Kollipost, F ; Andersen, J ; Mahler, D W ; Heimdal, Jimmy LU ; Heger, M ; Suhm, M A and Wugt Larsen, R (2014) In Journal of Chemical Physics 141(17).
Abstract
The effect of strong intermolecular hydrogen bonding on torsional degrees of freedom is investigated by far-infrared absorption spectroscopy for different methanol dimer isotopologues isolated in supersonic jet expansions or embedded in inert neon matrices at low temperatures. For the vacuum-isolated and Ne-embedded methanol dimer, the hydrogen bond OH librational mode of the donor subunit is finally observed at ∼560 cm(-1), blue-shifted by more than 300 cm(-1) relative to the OH torsional fundamental of the free methanol monomer. The OH torsional mode of the acceptor embedded in neon is observed at ∼286 cm(-1). The experimental findings are held against harmonic predictions from local coupled-cluster methods with single and double... (More)
The effect of strong intermolecular hydrogen bonding on torsional degrees of freedom is investigated by far-infrared absorption spectroscopy for different methanol dimer isotopologues isolated in supersonic jet expansions or embedded in inert neon matrices at low temperatures. For the vacuum-isolated and Ne-embedded methanol dimer, the hydrogen bond OH librational mode of the donor subunit is finally observed at ∼560 cm(-1), blue-shifted by more than 300 cm(-1) relative to the OH torsional fundamental of the free methanol monomer. The OH torsional mode of the acceptor embedded in neon is observed at ∼286 cm(-1). The experimental findings are held against harmonic predictions from local coupled-cluster methods with single and double excitations and a perturbative treatment of triple excitations [LCCSD(T)] and anharmonic. VPT2 corrections at canonical MP2 and density functional theory (DFT) levels in order to quantify the contribution of vibrational anharmonicity for this important class of intermolecular hydrogen bond vibrational motion. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Chemical Physics
volume
141
issue
17
article number
174314
publisher
American Institute of Physics (AIP)
external identifiers
  • pmid:25381521
  • wos:000344782200029
  • scopus:84910088956
  • pmid:25381521
ISSN
0021-9606
DOI
10.1063/1.4900922
language
English
LU publication?
yes
id
edabca81-97a2-4bf4-92c1-4e5dd3baa483 (old id 4817110)
date added to LUP
2016-04-01 10:02:19
date last changed
2021-07-21 02:03:26
@article{edabca81-97a2-4bf4-92c1-4e5dd3baa483,
  abstract     = {The effect of strong intermolecular hydrogen bonding on torsional degrees of freedom is investigated by far-infrared absorption spectroscopy for different methanol dimer isotopologues isolated in supersonic jet expansions or embedded in inert neon matrices at low temperatures. For the vacuum-isolated and Ne-embedded methanol dimer, the hydrogen bond OH librational mode of the donor subunit is finally observed at ∼560 cm(-1), blue-shifted by more than 300 cm(-1) relative to the OH torsional fundamental of the free methanol monomer. The OH torsional mode of the acceptor embedded in neon is observed at ∼286 cm(-1). The experimental findings are held against harmonic predictions from local coupled-cluster methods with single and double excitations and a perturbative treatment of triple excitations [LCCSD(T)] and anharmonic. VPT2 corrections at canonical MP2 and density functional theory (DFT) levels in order to quantify the contribution of vibrational anharmonicity for this important class of intermolecular hydrogen bond vibrational motion.},
  author       = {Kollipost, F and Andersen, J and Mahler, D W and Heimdal, Jimmy and Heger, M and Suhm, M A and Wugt Larsen, R},
  issn         = {0021-9606},
  language     = {eng},
  number       = {17},
  publisher    = {American Institute of Physics (AIP)},
  series       = {Journal of Chemical Physics},
  title        = {The effect of hydrogen bonding on torsional dynamics: A combined far-infrared jet and matrix isolation study of methanol dimer.},
  url          = {http://dx.doi.org/10.1063/1.4900922},
  doi          = {10.1063/1.4900922},
  volume       = {141},
  year         = {2014},
}