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Distribution of hexamethylbenzene in a zeolite studied by xenon-129 and multiple-quantum NMR

Journal Article · · J. Phys. Chem.; (United States)
DOI:https://doi.org/10.1021/j100311a003· OSTI ID:5249554

The distribution of hexamethylbenzene (HMB) molecules among the cavities of a Na-Y zeolite has been investigated by both xenon-129 and multiple-quantum NMR. For samples prepared at 523 K, xenon NMR shows that HMB molecules are dispersed nonuniformly, entering and remaining in the first available zeolite cavities. After further heat treatment at 573 K, the xenon spectrum collapses to one single line characteristic of a macroscopically uniform molecular distribution; multiple-quantum NMR counting indicates spin cluster of about 16 hydrogens, consistent with one HMB (18 hydrogens) per cavity.

Research Organization:
Univ. of California, Berkeley (USA)
DOE Contract Number:
AC03-76SF00098
OSTI ID:
5249554
Journal Information:
J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 91:27; ISSN JPCHA
Country of Publication:
United States
Language:
English