Schug, K. U.
|Title:||Decay of single and double quantum coherences in deuterated glassy ortho-terphenyl|
|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|
spin echo (NMR)
|Provenance:||American Institute of Physics|
|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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