title: Dipolar solid state NMR approaches towards medium-range structure in oxide glasses.
abstract: 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.
authors.affiliation: Institut für Physikalische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, 48149, Münster, Germany, eckerth@uni-muenster.de.
authors.forename: Hellmut
authors.initials: H
authors.lastname: Eckert
authors.forename: Stefan
authors.initials: S
authors.lastname: Elbers
authors.forename: Jan Dirk
authors.initials: JD
authors.lastname: Epping
authors.forename: Michael
authors.initials: M
authors.lastname: Janssen
authors.forename: Martin
authors.initials: M
authors.lastname: Kalwei
authors.forename: Wenzel
authors.initials: W
authors.lastname: Strojek
authors.forename: Ulrike
authors.initials: U
authors.lastname: Voigt