2-DIMENSIONAL XE-129 EXCHANGE NMR MEASUREMENTS OF XENON DYNAMICS IN NA-A ZEOLITE

Two-dimensional (2D) exchange NMR is a powerful tool for measuring the dynamics and energetics of adsorbed xenon atoms undergoing slow exchange between the alpha-cages of Na-A zeolite. In this proceedings, we present recently published results, as well as additional discussion and data obtained, using 2D Xe-129 NMR to determine rate coefficients for intercage xenon hopping and to correlate them with adsorption and activation energies. Variable-temperature experiments establish the activation energy for hopping between alpha-cages to be 60+/-10 kJ/mol. The dependence of these kinetic and thermodynamic quantities on xenon occupancy of the alpha-cages reflects the importance of intracage interactions on the behavior of the adsorbed guest molecules.


Editor(s):
Weitkamp, J and Karge, HG and Pfeifer, H and Holderich, W
Published in:
ZEOLITES AND RELATED MICROPOROUS MATERIALS: STATE OF THE ART 1994, 84, A-C, 519-526
Presented at:
ZEOLITES AND RELATED MICROPOROUS MATERIALS: STATE OF THE ART 1994, SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Year:
1994
Publisher:
ELSEVIER SCIENCE BV
ISSN:
0167-2991
ISBN:
0-444-81847-2
Note:
10th International Zeolite Conference, GARMISCH PARTENKIR, GERMANY, JUL 17-22, 1994
Laboratories:




 Record created 2015-01-08, last modified 2018-03-17


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