On the application of sup 129 Xe NMR to the study of microporous solids

Journal Article · Thu Sep 20 00:00:00 EDT 1990 · Journal of Physical Chemistry; (USA)

DOI:https://doi.org/10.1021/j100382a061· OSTI ID:6334435

Ripmeester, J A; Ratcliffe, C I ^[1]

---

1. National Research Council of Canada, Ottawa, Ontario (Canada)

Examination of {sup 129}Xe NMR chemical shift data for Xe trapped in clathrates and zeolites shows that a single, simple correlation with void space does not exist for all sorption site sizes. Simple model calculations show that such a correlation is indeed not expected, as in small trapping sites Xe has solidlike character whereas in larger sites it is more gaslike. It is also shown that, within the realm of weak van der Waals sites, the strongest sites are those which are closely matched in size to the Xe van der Waals radius and that both tighter and looser sites must be regarded as weaker sites. With model calculations and experimental data it is shown that it is essential to check the temperature dependence of the Xe chemical shift to determine the significance of the chemical shift measured at arbitrary temperature. Finally, it is shown for a two-site model that the chemical shift vs xenon content plot can take on a variety of shapes in the fast-exchange limit.

• OSTI ID: 6334435
• Journal Information: Journal of Physical Chemistry; (USA), Journal Name: Journal of Physical Chemistry; (USA) Vol. 94:19; ISSN 0022-3654; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
CALCULATION METHODS
CLATHRATES
DAYS LIVING RADIOISOTOPES
EVEN-ODD NUCLEI
INORGANIC ION EXCHANGERS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ION EXCHANGE MATERIALS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MAGNETIC RESONANCE
MATERIALS
MINERALS
NUCLEAR MAGNETIC RESONANCE
NUCLEI
RADIOISOTOPES
RESONANCE
SORPTIVE PROPERTIES
STABLE ISOTOPES
STRUCTURAL CHEMICAL ANALYSIS
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
XENON 129
XENON ISOTOPES
ZEOLITES