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Synthesis and Characterization of Hybrid Materials Obtained Through Hydrolysis of Alkoxysilanes and Vanadium Alkoxides

Published online by Cambridge University Press:  10 February 2011

B. Alonso ,
J. Maquet ,
B. Viana  and
C. Sanchez
B. Alonso
Affiliation:
Chimie de la Matière Condensée UMR CNRS 7574 - Université Pierre et Marie Curie 4 place Jussieu, 75252 Paris cedex 05, France - [email protected]
J. Maquet
Affiliation:
Chimie de la Matière Condensée UMR CNRS 7574 - Université Pierre et Marie Curie 4 place Jussieu, 75252 Paris cedex 05, France - [email protected]
B. Viana
Affiliation:
Chimie de la Matière Condensée UMR CNRS 7574 - Université Pierre et Marie Curie 4 place Jussieu, 75252 Paris cedex 05, France - [email protected]
C. Sanchez
Affiliation:
Chimie de la Matière Condensée UMR CNRS 7574 - Université Pierre et Marie Curie 4 place Jussieu, 75252 Paris cedex 05, France - [email protected]
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Abstract

New hybrid materials made of polydimethylsiloxane species (chains and cyclic species) crosslinked at the molecular level by O=V(O-)3 units with a very high degree of homogeneity and dispersion even for a V/Si ratio of 10% have been synthesized and characterized mainly by 29Si, 51V MAS NMR, DSC and DMA. The structure of these hybrids is very different from those proposed for the other dimethylsiloxane-transition metal oxide systems. These dimethylsiloxanevanadates copolymers exhibit higher glass transition temperatures than usual PDMS and a very sharp variation of the loss factor tanδ. These hybrid materials exhibit at low temperature a strong phosphorescence usually associated to a Ligand to Metal Charge Transfrer process.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 519: Symposium O – Organic/Inorganic Hybrid Materials , 1998 , 337
Copyright
Copyright © Materials Research Society 1998

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