Magic-angle spinning phosphorus-31 nuclear magnetic resonance of polycrystalline sodium phosphates
- 1 January 1986
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 10,p. 2247-2251
- https://doi.org/10.1039/dt9860002247
Abstract
The magic-angle spinning 31P n.m.r. spectra of a range of solid sodium ortho-, pyro-, poly-, and metaphosphates have been obtained. Counter ion, hydration state, crystalline form and inequivalence within a molecule all affect the solid-state chemical shift, which therefore deviates from the solution chemical shift. The multiplicity of 31P resonances indicates a level of structural inequivalence at least as large as that revealed by X-ray diffraction. Shielding anisotropies have also been obtained, which agree with previous studies but additionally show deviation from isotropic symmetry for some orthophosphates and deviation from axial symmetry for some terminal polyphosphate groups.Keywords
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