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Liquid 1-propanol studied by neutron scattering, near-infrared, and dielectric spectroscopy

Sillrén, Per, 1982 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Matic, Aleksandar, 1968 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Karlsson, Maths, 1978 (author)
Chalmers tekniska högskola,Chalmers University of Technology
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Koza, M. (author)
Institut Laue-Langevin
Maccarini, M. (author)
Institut Laue-Langevin
Fouquet, P. (author)
Institut Laue-Langevin
Goetz, M. (author)
Universität Augsburg,University of Augsburg
Bauer, T. (author)
Universität Augsburg,University of Augsburg
Gulich, R. (author)
Universität Augsburg,University of Augsburg
Lunkenheimer, P. (author)
Universität Augsburg,University of Augsburg
Loidl, A. (author)
Universität Augsburg,University of Augsburg
Mattsson, J. (author)
University of Leeds
Gainaru, C. (author)
Technische Universität Dortmund
Vynokur, E. (author)
Technische Universität Dortmund
Schildmann, S. (author)
Technische Universität Dortmund
Bauer, S. (author)
Technische Universität Dortmund
Bohmer, R. (author)
Technische Universität Dortmund
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 (creator_code:org_t)
AIP Publishing, 2014
2014
English.
In: Journal of Chemical Physics. - : AIP Publishing. - 1089-7690 .- 0021-9606. ; 140:12
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Liquid monohydroxy alcohols exhibit unusual dynamics related to their hydrogen bonding induced structures. The connection between structure and dynamics is studied for liquid 1-propanol using quasi-elastic neutron scattering, combining time-of-flight and neutron spin-echo techniques, with a focus on the dynamics at length scales corresponding to the main peak and the pre-peak of the structure factor. At the main peak, the structural relaxation times are probed. These correspond well to mechanical relaxation times calculated from literature data. At the pre-peak, corresponding to length scales related to H-bonded structures, the relaxation times are almost an order of magnitude longer. According to previous work [C. Gainaru, R. Meier, S. Schildmann, C. Lederle, W. Hiller, E. Rössler, and R. Böhmer, Phys. Rev. Lett.105, 258303 (2010)] this time scale difference is connected to the average size of H-bonded clusters. The relation between the relaxation times from neutron scattering and those determined from dielectric spectroscopy is discussed on the basis of broad-band permittivity data of 1-propanol. Moreover, in 1-propanol the dielectric relaxation strength as well as the near-infrared absorbance reveal anomalous behavior below ambient temperature. A corresponding feature could not be found in the polyalcohols propylene glycol and glycerol.

Subject headings

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

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