Regensburg 2010 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 24: Glasses and Glass Transition I (jointly with DY and DF)

CPP 24.9: Talk

Wednesday, March 24, 2010, 16:45–17:00, H48

Quantitative Lineshape Analysis for 1D- and 2D-Spectra of Amorphous Materials — •Jörn Schmedt auf der Günne, Sabarinathan Venkatachalam, Johannes Weber, and Yamini Avadhut — Department of Chemistry, Munich University (LMU), Germany

NMR is quantitative, is an often stated feature in magnetic resonance. In ¹H solid-state NMR the results from simple MAS experiments can be disappointing though. We present a model study [1] which identifies and quantifies different sources of errors and a new strategy which gives reliable results even under low resolution conditions.

A second aspect will be 2D deconvolution of the lineshapes of amorphous/glassy materials. We analyze the unexpected splittings in the 2D lineshape of many typical glasses with a new analytical fitting function. Based on these findings we suggest a structural model based on different subunits, which should also find their imprint in bulk properties.

[1] Y.S.Avadhut, D.Schneider, J.Schmedt auf der Günne, J. Magn. Reson. 201 (2009) 1-6.