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Structural transformations in bulk and matrix-isolated methanol from measured and computed infrared spectroscopy
Stockholm University, Faculty of Science, Department of Physics.
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Number of Authors: 11
2016 (English)In: Journal of Molecular Liquids, ISSN 0167-7322, E-ISSN 1873-3166, Vol. 216, 53-58 p.Article in journal (Refereed) Published
Abstract [en]

FTIR spectra of methanol trapped in an Ar matrix were registered during gradual heating of the sample. The spectral changes observed in these experiments indicate a transformation from isolated methanol monomers to small hydrogen-bonded clusters, allowing us to consider such experiments as an experimental model of the gas-liquid phase transition. The liquid-solid phase transition for methanol was investigated by analysing the temperature dependence of the registered FTIR spectra of methanol during cooling from 70 degrees C to 115 degrees C. Comparing the experimental spectra in the C-O stretching region with results of quantum-chemical calculations using the method of principal component analysis we draw conclusions about the size and structure of the methanol clusters formed in the sample at different temperatures.

Place, publisher, year, edition, pages
2016. Vol. 216, 53-58 p.
Keyword [en]
Methanol, Phase transition, Matrix isolation, Cluster, Hydrogen bond, PCA
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-130189DOI: 10.1016/j.molliq.2015.12.099ISI: 000374073900008OAI: oai:DiVA.org:su-130189DiVA: diva2:926983
Available from: 2016-05-10 Created: 2016-05-09 Last updated: 2016-05-10Bibliographically approved

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Pettersson, Lars G. M.
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