The adsorption isotherms and lz9Xe NMR chemical shifts of xenon in the voids of zeolite Y with O%, 53%, 75%, and 95% exchange of copper (II) for sodium ions were determined. With increasing copper content the shifts go uptield. The local chemical shifts of xenon at a crystallographic SII site with a
129Xe NMR of xenon adsorbed on zeolites: Relationship between the chemical shift and the void space
β Scribed by J. Demarquay; J. Fraissard
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 428 KB
- Volume
- 136
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
experiments we have determined values of the mean free path 1 of xenon adsorbed on various zeolites. We deduce from them the dependence of the chemical shift S on 1. It is now possible to determine the dimensions of any cavity in which xenon can be adsorbed.
π SIMILAR VOLUMES
The dependence of the 129Xe NMR chemical shift value of XeF2 on temperature and concentration was determined in a variety of prototypic media: in acidic (anhydrous HF, aHF), nonprotic but polar (dichloromethane), and basic (CD3CN-EtCN, 1:3 v/v) solvents. The 129Xe NMR spectra of a representative ser
## Abstract An approach for the automatic assignment of ^13^C spectra, based on the chemical shift/charge density relationship, is suggested. All permutations of spectral signals are computerβgenerated, and for every permutation a least squares adjustment is carried out. The permutation presenting