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Solid-State NMR Investigation Of Mixed-Alkali Distribution In Phosphate Glasses

Published online by Cambridge University Press:  18 March 2011

S. Prabakar  and
K.T. Mueller
S. Prabakar
Affiliation:
Department of Chemistry, The Pennsylvania State University152 Davey Laboratory, University Park, PA 16802
K.T. Mueller
Affiliation:
Department of Chemistry, The Pennsylvania State University152 Davey Laboratory, University Park, PA 16802
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Abstract

The correlation between 31P and 23Na (or 133Cs) nuclei in a mixed-alkali phosphate glass has been investigated by TRAnsfer of Populations by DOuble Resonance (TRAPDOR) NMR spectroscopy. The variation in spatial proximity between 31P nuclei in phosphate tetrahedra and sodium (or cesium) modifier ions has been demonstrated in a phosphate glass with molar composition 25 Cs2O: 31 Na2O: 44P2O5. Interactions between 31P and 23Na (or 133Cs) nuclei are shown to exist even at low dephasing times indicating the short-range nature of these couplings. The ratios of resonance intensities from Q1 and Q2 phosphate units show different trends depending on whether couplings to 23Na or 133Cs are investigated, demonstrating the differing structural roles of the modifier alkali cations within the glass.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 658: Symposium GG – Solid-State Chemistry of Inorganic Materials III , 2000 , GG3.20
Copyright
Copyright © Materials Research Society 2001

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References

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