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Formation of Highly Dispersed Metals on Functionalized Silica Supports

Published online by Cambridge University Press:  25 February 2011

Francois Rousseau ,
Z. Duan ,
M. J. Hampden-Smtth  and
A. Datye
Francois Rousseau
Affiliation:
Department of Chemistry, University of New Mexico, Albuquerque NM 87131
Z. Duan
Affiliation:
Department of Chemistry, University of New Mexico, Albuquerque NM 87131
M. J. Hampden-Smtth
Affiliation:
Department of Chemistry, University of New Mexico, Albuquerque NM 87131
A. Datye
Affiliation:
Department of Chemical Engineering, University of New Mexico, Albuquerque NM 87131 Center for Micro-Engineered Ceramics, University of New Mexico, Albuquerque NM 87131
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Abstract

The hydrolysis of H2N(CH2)2NH(CH2)3Si(oMe)3 with a stoichiometric amount of water results in loss of the -OMe groups after two days and formation of a mixture of species mainly with empirical formula, [H2N(CH2)2NH(CH2)3Si(O)3]. The reaction of representative examples of metal salts, e.g. Cu(NO1.5)2, and metal-organic compounds, [(NBD)RhCl]2, with the amino-group of the amine functionalized polysiloxanes [H2N(CH2)2NH(CH2)3Si(O)1.5] has been demonstrated. These species undergo thermal decomposition in air, typically at 200°C, with complete loss of the organic supporting ligands. On heating to 450°C in O2, sintering occurs to form large, ∼1μm, sized silica particles which contain highly dispersed, ∼4nm sized metal-containing particles. The surface areas range from 228 to 583 m2/g. After reduction, the rhodium species is active towards catalytic hydrogenation of pyrene.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 271: Symposium N – Better Ceramics Through Chemistry V , 1992 , 633
Copyright
Copyright © Materials Research Society 1992

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References

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