Solid state NMR study of phosphosilicate gels

Clayden, N. J., Aronne, A., Esposito, S. and Pernice, P. (2004) Solid state NMR study of phosphosilicate gels. Journal of Non-Crystalline Solids, 345. pp. 601-604. ISSN 0022-3093

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Solid state Si-29, P-31 and H-1 MAS-NMR were used to investigate structural aspects of gel-derived glasses of molar composition 10P(2)O(5).90SiO(2) (10P) and 30P(2)O(5) . 70SiO(2) (30P). P-31 MAS-NMR spectra of the 10P and 30P gels dried at 100degreesC show resonances characteristic of orthophosphoric and pyrophosphoric acid. No evidence for cross-linking with silicate matrix was found by 29Si NMR at this temperature while H-1 MAS-NMR experiments suggest that the chemical environment of OH groups is very similar in these samples. In spite of this initial similarity further heating causes markedly different structural rearrangements of the 10P and 30P gel matrix. (C) 2004 Elsevier B.V. All rights reserved.

Item Type: Article
Faculty \ School: Faculty of Science > School of Chemistry
Depositing User: Rachel Smith
Date Deposited: 15 Jun 2011 11:11
Last Modified: 21 Apr 2020 20:16
DOI: 10.1016/j.jnoncrysol.2004.08.105

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