| Autor: |
Eckert H; Institut für Physikalische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, 48149, Münster, Germany, eckerth@uni-muenster.de., Elbers S, Epping JD, Janssen M, Kalwei M, Strojek W, Voigt U |
| Jazyk: |
angličtina |
| Zdroj: |
Topics in current chemistry [Top Curr Chem] 2005; Vol. 246, pp. 195-233. |
| DOI: |
10.1007/b98651 |
| Abstrakt: |
Modern solid state nuclear magnetic resonance presents new powerful opportunities for the elucidation of medium range order in glasses in the sub-nanometer region. In contrast to standard chemical shift spectroscopy, the strategy presented here is based on the precise measurement and quantitative analysis of internuclear magnetic dipole-dipole interactions, which can be related to distance information in a straightforward manner. The review discusses the most commonly employed experimental techniques, producing dipolar coupling information in both homo- and heteronuclear spin systems. The approach is particularly powerful in combination with magic-angle sample spinning, producing site-resolved dipolar coupling information. We present new applications to oxide-based network glasses, permitting network connectivities and spatial cation distributions to be elucidated. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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