Characterization of guest molecules adsorbed on zeolites of known structure. Part III - Localization of the p-XYLI and p-XYLII species sorbed in a high coverage B. ZSM-5/p-XYLENE complex
By combining full profile X-ray powder diffraction structure refinements, extraction of the integrated intensities and difference-Fourier synthesis, it has been possible to characterize and localize the two XYL I and XYL II species of p-xylene organic guest molecules adsorbed in a high coverage B.ZSM-5/p-xylene complex. The investigations have been performed on the calcined H/sub 1.40/AI/sub 0.02/B/sub 1.38/Si/sub 94.60/O/sub 192/ boralite phase which has been saturated with liquid p-xylene at room temperature. Interpretation of a difference-Fourier map reveals the presence of fixed sites at the channel intersections and in the sinusoidal channels. These sites correspond respectively to the XYL I and XYL II species. Most suprisingly, the distribution of these two species in the zeolitic framework corresponds to relatively high xylene/xylene or xylene/framework interactions in the high-coverage B.ZSM-5/nXYL complex (n up to approx. =8 p-xylene molecules/unit-cell).
- Research Organization:
- Laboratoire de Physico-Chimie Minerale IA, UA 116 du CNRS, Universite Claude-Bernard, LYON I 43, Bd du 11 Novembre 1918, F-69622 Villeurbanne Cedex (FR)
- OSTI ID:
- 7007988
- Journal Information:
- Mater. Res. Bull.; (United States), Vol. 23:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
MOLECULES
ADSORPTION
XYLENES
PHASE TRANSFORMATIONS
ZEOLITES
X-RAY DIFFRACTION
ALUMINIUM
BORON
FOURIER TRANSFORMATION
HYDROGEN
INTERACTIONS
MOLECULAR STRUCTURE
SILICON
ALKYLATED AROMATICS
AROMATICS
COHERENT SCATTERING
DIFFRACTION
ELEMENTS
HYDROCARBONS
INORGANIC ION EXCHANGERS
INTEGRAL TRANSFORMATIONS
ION EXCHANGE MATERIALS
MATERIALS
METALS
MINERALS
NONMETALS
ORGANIC COMPOUNDS
SCATTERING
SEMIMETALS
SORPTION
TRANSFORMATIONS
360602* - Other Materials- Structure & Phase Studies
400101 - Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
400201 - Chemical & Physicochemical Properties