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Writing and Low-Temperature Characterization of Oxide Nanostructures
06:43

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Published on: July 18, 2014

Dipolar solid state NMR approaches towards medium-range structure in oxide glasses.

Hellmut Eckert1, Stefan Elbers, Jan Dirk Epping

  • 1Institut für Physikalische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, 48149, Münster, Germany, eckerth@uni-muenster.de.

Topics in Current Chemistry
|December 14, 2011
PubMed
Summary

Solid-state nuclear magnetic resonance (NMR) reveals medium-range order in glasses by analyzing internuclear magnetic dipole-dipole interactions. This technique provides precise distance information, elucidating network connectivities and cation distributions in oxide glasses.

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Spectroscopy

Background:

  • Understanding medium-range order in glasses is crucial for materials design.
  • Standard chemical shift spectroscopy has limitations in probing sub-nanometer structures.
  • Nuclear magnetic resonance (NMR) offers advanced capabilities for materials characterization.

Purpose of the Study:

  • To review modern solid-state NMR techniques for elucidating medium-range order in glasses.
  • To highlight the analysis of internuclear magnetic dipole-dipole interactions for distance determination.
  • To present applications in oxide-based network glasses.

Main Methods:

  • Utilizing internuclear magnetic dipole-dipole interactions for distance measurements.
  • Employing both homo- and heteronuclear spin systems.
  • Combining techniques with magic-angle sample spinning for site-resolved information.

Main Results:

  • Demonstrated the power of dipole-dipole interactions for precise distance information in glasses.
  • Showcased site-resolved dipolar coupling information using magic-angle sample spinning.
  • Successfully applied the approach to oxide-based network glasses.

Conclusions:

  • Solid-state NMR, through dipole-dipole interactions, offers powerful insights into sub-nanometer order in glasses.
  • This method enables straightforward distance determination and structural elucidation.
  • The technique is effective for analyzing network connectivities and cation distributions in oxide glasses.