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Rotational Diffusion of Microconfined Liquids

Published online by Cambridge University Press:  10 February 2011

Brian J. Loughnane ,
Richard A. Farrer  and
John T. Fourkas
Brian J. Loughnane
Affiliation:
Eugene F.Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467
Richard A. Farrer
Affiliation:
Eugene F.Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467
John T. Fourkas
Affiliation:
Eugene F.Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467
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Abstract

The orientational behavior of liquids confined in nanoporous glasses has been studied using ultrafast Optical Kerr Effect spectroscopy. We discuss the detailed microscopic behavior of a weakly wetting liquid (methyl iodide) and a strongly wetting liquid (acetonitrile) confined in these glasses. We demonstrate that the behavior of methyl iodide is dominated by geometrical effects while the behavior of acetonitrile is dominated by surface interactions. We provide evidence that molecular exchange into the bulk is an important channel for the reorientation of strongly wetting liquids at interfaces.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 543: Symposium W – Dynamics in Small Confining Systems IV , 1998 , 33
Copyright
Copyright © Materials Research Society 1999

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