NMR study of Rb clusters in zeolite LTA

• Published in: Physica. B, Condensed matter Vol. 327; no. 1; pp. 72 - 78
• Main Authors: Igarashi, M., Kodaira, T., Ikeda, T., Itoh, M., Shimizu, T., Goto, A., Nozue, Y.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-03-2003; Elsevier
• Subjects: [formula omitted] NMR; Chemical and knight shifts; Chemistry; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; General and physical chemistry; Ion-exchange; LTA; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Nuclear magnetic resonance and relaxation; Physics; Potassium; Rubidium; Surface physical chemistry; Zeolite; Zeolites: preparations and properties; 75.30.−g; 87 Rb NMR; LTA; 75.25.+z; Zeolite; 27 Al NMR; 76.60.Cq; Rubidium; 76.60.−k; Potassium; Temperature dependence; Frequency dependence; Inorganic compounds; Cluster; Experimental study; Spectral line shift; Zeolites; 75.30.-g; 76.60.Cq Zeolite; Electron interaction; 87Rb NMR; Nuclear magnetic resonance; 76.60.-k; 27Al NMR
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/S0921-4526(02)01704-0

The features of
27
Al
and
87
Rb
NMR in Rb-loaded LTA-type zeolite are discussed in comparison with K-loaded one. Broadening of
27
Al
spectrum by magnetic origin is observed and the difference from the K case is pointed out for the shape of spectrum. These facts suggest that the configurations of electrons are not identical in the cases of Rb and K. For
87
Rb
the mass center of the spectrum shifts clearly to higher frequency side below
10
K
. The existence of Fermi contact interaction between s electron and Rb nuclei is suggested.