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17O MQMAS NMR studies of Na-A and Ca-A
Jennifer E Readman1, Namjun Kim, Martine Ziliox
1Department of Chemistry, State University of New York at Stony Brook, Stony Brook, NY 11794-3400, USA.
Chemical Communications (Cambridge, England)
|December 14, 2002
Abstract:
We report, for the first time, 17O MQMAS and 17O/23Na double resonance NMR studies on calcium-exchanged zeolite sodium-A; the results show that the isotropic shifts of the framework sites are strongly affected by factors including the hydration level and nature of the charge-balancing cations.