Hostname: page-component-6bf8c574d5-vmclg Total loading time: 0 Render date: 2025-02-22T08:10:48.396Z Has data issue: false hasContentIssue false
  • English
  • Français

NMR Relaxation of quadrupolar Nuclei as a Probe of the Motion of Guest Species in Sodalite Cavities

Published online by Cambridge University Press:  15 February 2011

R. Jelinek  and
G. A. Ozin
R. Jelinek
Affiliation:
Materials Science Division, Lawrence Berkeley Laboratories, and Department of Chemistry, University of California, Berkeley, CA 94720
G. A. Ozin
Affiliation:
Advanced Zeolite Materials Science Group, Lash Miller Chemical Laboratories, University of Toronto, Toronto, Ontario M5S-1A1, Canada
Get access

Abstract

Useful information on interactions and motion of guest molecules in sodalite cavities is obtained by estimating the spin-lattice and spin-echo decay rates of encapsulated Br− ions. An extremely fast spin-lattice relaxation rate is observed for 81Br nuclei, adjacent to Br−-empty cages which contain rapidly tumbling water molecules. We detect a further significant different T1 of the 81Br in Na8Br2- sodalite and AgsBr2-sodalite, respectively, which probably indicates a less restricted motion within the cavities of the Ag+-exchanged material. Spin-echo decay experiments additionally indicate a difference between the dynamic properties of the Br− anion in the encapsulated Na4Br and Ag4Br clusters, respectively.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 290: Symposium N – Dynamics in Small Confining Systems , 1992 , 113
Copyright
Copyright © Materials Research Society 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Breck, D.W., Zeolite Molecular Sieves, (R.E. Kieger Publishing Company, Malabar, 1984).Google Scholar
2. Ozin, G.A., Kuperman, A., Stein, A., Angew. Chem., 101, 359 (1989).Google Scholar
3. Abargam, A., Principles of Nuclear Magnetism (Oxford University Press, Oxford, 1961).Google Scholar
4. Haase, J., Park, K.D., Guo, K., Timken, H.K.C., Oldfield, E., J. Phys. Chem., 95, 6996 (1991).Google Scholar
5. Haase, J., Oldfield, E., Schmitt, K., Chem. Phys. Lett., 193, 274 (1992).Google Scholar
6. Stein, A., Ozin, G.A., Macdonald, G.M., Stucky, G.D., Jelinek, R., J. Am. Chem. Soc., 114, 5171 (1992).Google Scholar
7. Fenzke, D., Freude, D., Frohlich, T., Haase, J., Chem. Phys. Lett., 111, 171 (1984).Google Scholar
8. Jelinek, R., Chmelka, B.F., Stein, A., Ozin, G.A., J. Phys. Chem., 96, 6744 (1992).Google Scholar
9. Hubbard, P.S., J. Chem. Phys., 53, 985 (1970).Google Scholar
10. Jelinek, R., Ozin, G.A., unpublished results.Google Scholar