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The Formation of Molecular Composites by a Modified Solgel Process

Published online by Cambridge University Press:  21 February 2011

Ronald B. Lessard,
Mary M. Wallacet,
W. Anthony Oertling,
Chi K. Chang,
Kris A. Berglund and
Daniel G. Nocera
Ronald B. Lessard
Affiliation:
Departments of Chemistry, and the Center for Fundamental Materials Research at Michigan State University, East Lansing, MI 48824
Mary M. Wallacet
Affiliation:
Department of Chemical Engineering, and the Center for Fundamental Materials Research at Michigan State University, East Lansing, MI 48824
W. Anthony Oertling
Affiliation:
Departments of Chemistry, and the Center for Fundamental Materials Research at Michigan State University, East Lansing, MI 48824
Chi K. Chang
Affiliation:
Departments of Chemistry, and the Center for Fundamental Materials Research at Michigan State University, East Lansing, MI 48824
Kris A. Berglund
Affiliation:
Department of Chemical Engineering, and the Center for Fundamental Materials Research at Michigan State University, East Lansing, MI 48824Department of Agricultural Engineering, and the Center for Fundamental Materials Research at Michigan State University, East Lansing, MI 48824
Daniel G. Nocera
Affiliation:
Departments of Chemistry, and the Center for Fundamental Materials Research at Michigan State University, East Lansing, MI 48824
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Abstract

Standard sol-gel procedures have been modified to permit sol-gel synthesis to be performed at varying hydrogen ion concentrations and in a variety of organic solvents. These modifications greatly expand the variety of guest molecules that can be incorporated into nondense glassy environments. Processing conditions can be controlled such that the guest compounds generally retain their solution properties thereby allowing new molecular composites to be formed. Reported herein is the incorporation of both porphyrins and metalloporphyrins into silica matrices. Electronic absorption, vibrational, and excited state luminescence properties of the resulting composites clearly demonstrate that the molecular and electronic structure of the porphyrins and metalloporphyrins are preserved during sol-gel processing and in the ceramic matrices. This retention of properties has been shown for guest molecules doped into monoliths as well as films.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 155: Symposium L – Processing Science of Advanced Ceramics , 1989, 109
Copyright
Copyright © Materials Research Society 1989

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References

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