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NMR-Studies of the Diffusion of Cyclohexane in Porous Silica

Mitzithras, A., Coveney, F.M., Strange, John H. (1992) NMR-Studies of the Diffusion of Cyclohexane in Porous Silica. Molecular Motion And Structure In Disordered Condensed Matter, 54 (4). pp. 253-259. ISSN 0167-7322. (doi:10.1016/0167-7322(92)80034-F) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1016/0167-7322(92)80034-F

Abstract

Self diffusion measurements of cyclohexane adsorbed in porous silica glass with a range of pore diameters are reported. The diffusion measurements were made by Nuclear Magnetic Resonance (nmr) using the spin-echo pulsed field-gradient method (pgse). No deviation from a Gaussian diffusion process and no evidence of bounded motion was found. However, a different behaviour to that reported in the literature for similar samples which were water saturated was observed for the relative reduction of the diffusion constant, D(eff)/D(o). The relation D(eff)/D(o)=e(-b/d) was found to describe the diffusion of the cyclohexane and this supports a semi-empirical model of molecular motion in confined geometry which can be characterised by two physical parameters, namely the pore diameter, d, and the ''effective'' permeability, 1/b.

Item Type: Article
DOI/Identification number: 10.1016/0167-7322(92)80034-F
Additional information: Issue number is : 4 The event is an annual meeting.
Subjects: Q Science > QC Physics
Divisions: Faculties > Sciences > School of Physical Sciences
Depositing User: M. Nasiriavanaki
Date Deposited: 26 Aug 2009 08:24 UTC
Last Modified: 06 Jun 2019 10:27 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/22373 (The current URI for this page, for reference purposes)
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