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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 ispresented. First, the NMR relaxation rates, 1/T1, 1/T1ρ , and 1/T2 were measured for severalmolecular liquids confined to porous silica glasses with pore radii in therange from 12 Å to 100 Å as a function of temperature, pore size, andfrequency. The experimental relaxation data were interpreted in terms ofbulk, surface, and topological contributions using the followingexpression:

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

Second, the pressure effects on the dynamics of the confined liquid of acetonitrile-d3 were also investigated. Third, the naturalabundance of 13C spin lattice relaxation rates for CS2confined to porous silica glasses provided information about confinementeffects on the angular momentum behavior of this simple liquid.

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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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