Journal Article

PreJuSER-34287

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Methyl group dynamics in glassy toluene : a neutron scattering study

Moreno, A. J. ; Alegria, A. ; Colmenero, J. ; Prager, M.FZJ* ; Grimm, H.FZJ* ; Frick, K. H.

2001
American Institute of Physics Melville, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/1298  doi:10.1063/1.1413742

Abstract: We present a neutron scattering study on methyl group dynamics in glassy toluene. The spectra in the whole temperature range, covering the transition from quantum rotational tunneling to classical hopping, have been successfully analyzed in terms of a potential barrier distribution model. The average barrier in the glass is found to be notably higher than the unique barrier of the crystalline beta -phase, whose short-range structure is known to be similar to that of the glass. Due to the mainly intermolecular origin of the interactions on the methyl groups in toluene, it is concluded that the rotational potentials are strongly affected by structural disorder. (C) 2001 American Institute of Physics.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Neutronenstreuung (IFF-NST)

Research Program(s):

1. Polymere, Membranen und komplexe Flüssigkeiten (23.30.0)

Appears in the scientific report 2001
Notes: This version is available at the following Publisher URL: http://jcp.aip.org

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