Solid-State27Al and 29Si Magic-Angle Spinning NMR of Aluminosilicate Gels |
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| Authors: | Sridhar Komarneni Rustum Roy Colin A. Fyee Gordon J. Kennedy Harold Strobl |
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| Affiliation: | Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802;Department of Chemistry, University of Guelph, Guelph, Ontario, Canada N1G 2W1 |
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| Abstract: | The environment of the Al and Si atoms of diphasic and single-phase aluminosilicate gels was determined by solid-state 27Al and 29Si magic-angle spinning nuclear magnetic resonance (MASNMR) spectroscopy, The tetrahedral coordination of Al increased with decreasing Al/Si ratio in single-phase gels but not in diphasic gels. The results showed that ultrahomogeneous mixing on a next-nearest-neighbor level is achieved in single-phase aluminosilicate gels, while in diphasic gels this has successfully been avoided . |
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