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Dynamics of Liquids in Confined Geometries

Published online by Cambridge University Press:  21 February 2011

Shu Xu ,
J.-P. Korb  and
J. Jonas
Shu Xu
Affiliation:
Department of Chemistry, School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801
J.-P. Korb
Affiliation:
Laboratoire de Physique de la Matière Condensée, Ecole Polytechnique, CNRS 91128, Palaiseau, France.
J. Jonas
Affiliation:
Department of Chemistry, School of Chemical Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801
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Abstract

An overview of several NMR studies of liquids in confined geometries is presented. First, the NMR relaxation rates, 1/T1, 1/T1ρ , and 1/T2 were measured for several molecular liquids confined to porous silica glasses with pore radii in the range from 12 Å to 100 Å as a function of temperature, pore size, and frequency. The experimental relaxation data were interpreted in terms of bulk, surface, and topological contributions using the following expression:

where 1/Tib and 1/Tis are the bulk and the surface layer relaxation rates, ε is the thickness of the surface layer, R is the pore radius, and Ai(ω) represents the pure topological effect.

Second, the pressure effects on the dynamics of the confined liquid of acetonitrile-d3 were also investigated. Third, the natural abundance of 13C spin lattice relaxation rates for CS2 confined to porous silica glasses provided information about confinement effects on the angular momentum behavior of this simple liquid.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 346: Symposium N – Better Ceramics Through Chemistry VI , 1994 , 925
Copyright
Copyright © Materials Research Society 1998

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References

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