Liquid 1-propanol studied by neutron scattering, near-infrared, and dielectric spectroscopy
Journal article, 2014

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.

Author

Per Sillrén

Chalmers, Applied Physics, Condensed Matter Physics

Aleksandar Matic

Chalmers, Applied Physics, Condensed Matter Physics

Maths Karlsson

Chalmers, Applied Physics, Condensed Matter Physics

M. Koza

Institut Laue-Langevin

M. Maccarini

Institut Laue-Langevin

P. Fouquet

Institut Laue-Langevin

M. Goetz

University of Augsburg

T. Bauer

University of Augsburg

R. Gulich

University of Augsburg

P. Lunkenheimer

University of Augsburg

A. Loidl

University of Augsburg

J. Mattsson

University of Leeds

C. Gainaru

Technische Universität Dortmund

E. Vynokur

Technische Universität Dortmund

S. Schildmann

Technische Universität Dortmund

S. Bauer

Technische Universität Dortmund

R. Bohmer

Technische Universität Dortmund

Journal of Chemical Physics

0021-9606 (ISSN) 1089-7690 (eISSN)

Vol. 140 12 124501

Subject Categories

Condensed Matter Physics

DOI

10.1063/1.4868556

More information

Latest update

6/12/2018