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Controlling Materials Architecture on the Nanometer-Scale: PPV Nanocomposites Via Polymerizable Lyotropic Liquid Crystals

Published online by Cambridge University Press:  10 February 2011

Ryan C. Smith ,
Hai Deng ,
Walter M. Fischer  and
Douglas L. Gin
Ryan C. Smith
Affiliation:
Department of Chemistry, University of California, Berkeley, CA 94720-1460
Hai Deng
Affiliation:
Department of Chemistry, University of California, Berkeley, CA 94720-1460
Walter M. Fischer
Affiliation:
Department of Chemistry, University of California, Berkeley, CA 94720-1460
Douglas L. Gin
Affiliation:
Department of Chemistry, University of California, Berkeley, CA 94720-1460
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Abstract

We have developed a general strategy for the construction of ordered nanocomposites with hexagonal symmetry, using polymerizable lyotropic (i.e., amphiphilic) liquid crystals. In this approach, self-organizing lyotropic liquid-crystalline monomers are used to form an ordered template matrix in the presence of a reactive hydrophilic solution. Subsequent photopolymerization to lock-in the matrix architecture, followed by initiation of chemistry within the ordered hydrophilic domains to afford solid-state fillers, yields the anisotropic nanocomposites. Composites have been synthesized that have a regular hexagonal arrangement of extended poly(p-phenylenevinylene) (PPV) domains, with a regular interchannel spacing of 4 nm. The photoluminescence of these materials is significantly altered from that of bulk PPV. The dimensions of these nanocomposites can be tuned by varying the size of the hydrophobic tails and/or the nature of the counterion associated with the hydrophilic headgroup of the monomer.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 488: Symposium J – Electrical, Optical & Magnetic Properties of Organic IV , 1997 , 419
Copyright
Copyright © Materials Research Society 1998

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