Authors: Böhmer, Roland
Kircher, O.
Diezemann, G.
Hinze, G.
Schug, K. U.
Sillescu, H.
Zimmermann, H.
Title: Decay of single and double quantum coherences in deuterated glassy ortho-terphenyl
Language (ISO): en
Abstract: The decay of single and double quantum coherences in amorphous ortho-terphenyl is studied by means of deuteron NMR echo experiments near and below the calorimetric glass transition temperature Tg. In perdeuterated samples a Gaussian decay for these coherences is found at low temperatures, in accord with theoretical predictions for random local dipolar fields. A method is proposed to extract information about slow motional processes from ordinary solid echo experiments below Tg. Partly deuterated ortho-terphenyl does not show a Gaussian decay. Simple model calculations show that this observation indicates the importance of correlations of the local dipolar fields in the presence of protons
Subject Headings: organic compounds
glass transition
spin echo (NMR)
URI: http://hdl.handle.net/2003/25709
http://dx.doi.org/10.17877/DE290R-3355
Issue Date: 1998-05-22
Rights: ©1998 American Institute of Physics
Publisher: American Institute of Physics
URL: http://dx.doi.org/ 10.1063/1.476284
Citation: Kircher, O.; Diezemann, G.; Böhmer, R.; Hinze, G.; Schug, K. U.; Sillescu, H.; Zimmermann, H.: Decay of single and double quantum coherences in deuterated glassy ortho-terphenyl. In: Journal of Chemical Physics Nr. 20, Jg. 108(1998), S. 8550-8556, doi: 10.1063/1.476284.
Appears in Collections:Böhmer, Roland Prof. Dr.

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