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Hydrolysis and Condensation of Modified TIN (IV) Alkoxide Compounds to form Controlled Porosity Materials

Published online by Cambridge University Press:  25 February 2011

Christophe Roger ,
M. J. Hampden Smith  and
C. J. Brinker
Christophe Roger
Affiliation:
University of New Mexico, Department of Chemistry and Center for Micro-Engineered Ceramics, Albuquerque, NM 87131
M. J. Hampden Smith
Affiliation:
University of New Mexico, Department of Chemistry and Center for Micro-Engineered Ceramics, Albuquerque, NM 87131
C. J. Brinker
Affiliation:
Sandia National Laboratories, P.O. BOX 5800, Albuquerque, NM 87185
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Abstract

Sol-gel type hydrolysis and condensation has been studied extensively as a method for the control of evolution of microstructure in the formation of inorganic silicates. However, in non silicate systems, the same level of control of microstructural evolution has yet to be demonstrated. In this work, we report the synthesis of mixed ligand tin (IV) alkoxide complexes specifically designed to undergo sequential hydrolysis reactions, where, as a result, control over porosity of the final metal oxide network is expected. A series of tin (IV) alkoxide compounds modified with difunctional carboxylate ligands as templates has been prepared with internuclear tin separations that are determined by the length of the bridging carboxylate group. The first hydrolysis step consists of the removal of the alkoxide ligands to create a three-dimensional network of oxo-bridged tin carboxylate species. In the second step, the bridging groups are removed by acid hydrolysis to leave pores without creating new Sn-O-Sn bonds. The synthesis and characterization of these species and the connection between pore structure (i.e. micro- vs. meso- porosity) as a function of the dimensions of the bridging ligands will be reported.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 271: Symposium N – Better Ceramics Through Chemistry V , 1992 , 51
Copyright
Copyright © Materials Research Society 1992

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References

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