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Cation Effects on 31 P MAS NMR Chemical Shifts of Metaphosphate Glasses
Author(s) -
Brow Richard K.,
Phifer Carol C.,
Turner Gary L.,
Kirkpatrick R. James
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb04099.x
Subject(s) - metaphosphate , chemical shift , magic angle spinning , ionic bonding , chemistry , magic angle , nuclear magnetic resonance spectroscopy , nuclear magnetic resonance , counterion , anisotropy , analytical chemistry (journal) , inorganic chemistry , ion , stereochemistry , physics , organic chemistry , phosphate , quantum mechanics
We have examined a series of metaphosphate glasses with 31 P magic angle spinning nuclear magnetic resonance (MAS NMR) spectroscopy. Increasing the ionic potential ( Z/a ) of the modifying cation from sodium to magnesium causes a systematic change to more shielded isotropic chemical shifts with a concomitant increase in the peak FWHM. These spectral trends are consistent with counterion‐induced modifications to the ionic character of the P–O bond. Such modifications do not produce significant changes in either the chemical shift anisotropy or the asymmetry parameter.