{sup 23}Na synchronized double-rotation NMR study of Cs{sup +}, Ca{sup 2+}, and La{sup 3+} cation-exchanged sodium zeolite Y

Journal Article · Thu Jun 01 04:00:00 EDT 1995 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100022a042· OSTI ID:68004

Jelinck, R ^[1]; Malek, A; Ozin, G A ^[2]

---

1. Lawrence Berkeley Lab., CA (United States)
2. Univ. of Toronto (Canada)

High-resolution, {sup 23}Na synchronized double-rotation NMR (DOR) experiments provide site-specific information on cation-exchange processes in sodium zeolite Y. The {sup 23}Na NMR spectra of Na{sub 56}Y, progressively exchanged with Cs{sup +}, Ca{sup 2+}, and La{sup 3+} cations, respectively, indicate significantly different cation distributions in the exchanged materials. Cs{sup +} cations preferably deplete Na{sup +} cations from the supercage, while Ca{sup 2+} cations initially replace Na{sup +} cations in the hexagonal prisms. La{sup 3+} cation-exchange, by contrast, is least disturbing to the relative distribution of the Na{sup +} cations. {sup 133}Cs magic angle spinning (MAS) experiments provide additional information on the cation distributions in the Cs{sup +} cation-exchanged sodium zeolite Y. Interestingly, the positions of the {sup 133}Cs resonance exhibit a significant sensitivity with respect to coexisting extraframework cations in the zeolite. 30 refs., 5 figs.

• Sponsoring Organization: USDOE
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 68004
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 22 Vol. 99; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
CALCIUM IONS
CESIUM IONS
ION EXCHANGE
LANTHANUM IONS
NMR SPECTRA
SODIUM COMPOUNDS
STRUCTURAL CHEMICAL ANALYSIS
ZEOLITES