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Lone-pair effects and structural trends in xSNO·(1-x)P2O5 glasses deduced from 31P and 119Sn nuclear magnetic resonance

Holland, D. and Howes, A.P. and Smith, M.E. and Hannon, A.C. (2002) Lone-pair effects and structural trends in xSNO·(1-x)P2O5 glasses deduced from 31P and 119Sn nuclear magnetic resonance. Journal of Physics Condensed Matter, 14 (49). pp. 13609-13621. ISSN 0953-8984

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Abstract

Tin phosphate glasses, of general formula xSnO·(1 - x)P2O5(0.3 < x < 0.8), have been prepared by conventional melt-quench techniques and their structures studied using 31P and 119Sn nuclear magnetic resonance. The distribution of [PO4] Qn species changes with composition in accordance with the simple binary model, and the changes in chemical shift can be explained by the redistribution of electron charge from the P=O double bond. Sn(II) is found to occupy a highly asymmetric site, typical of a sterically active lone pair of electrons. The 119Sn parameters of the chemical shift tensor change systematically with x, reflecting the change in local environment from one where the next nearest neighbours are predominantly Q2 phosphorus to one where they are predominantly Q0 phosphorus.

Item Type: Journal Article
Journal or Publication Title: Journal of Physics Condensed Matter
Subjects: ?? CHEMICAL BONDSCOMPOSITIONELECTRONSNUCLEAR MAGNETIC RESONANCE SPECTROSCOPYPHOSPHORUSTIN COMPOUNDSCHEMICAL SHIFT TENSORCONVENTIONAL MELT-QUENCH TECHNIQUESELECTRON CHARGELONE-PAIR EFFECTSTIN PHOSPHATE GLASSESGLASS ??
Departments: VC's Office
ID Code: 130330
Deposited By: ep_importer_pure
Deposited On: 04 Jan 2019 11:05
Refereed?: Yes
Published?: Published
Last Modified: 26 Mar 2019 02:30
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/130330

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