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Sol-Gel Chemistry of Hydrogenosiliconates: The Role of Hypervalent Silicon Species

Published online by Cambridge University Press:  28 February 2011

V. Belot ,
R. Corriu ,
C. Guerin ,
B. Henner ,
D. Leclercq ,
H. Mutin ,
A. Vioux  and
Q. Wang
V. Belot
Affiliation:
Unité Mixte CNRS, Rhône Poulenc, USTL n° 44 Université de Montpellier II Place E. Bataillon 34095 Montpellier Cedex 05
R. Corriu
Affiliation:
Unité Mixte CNRS, Rhône Poulenc, USTL n° 44 Université de Montpellier II Place E. Bataillon 34095 Montpellier Cedex 05
C. Guerin
Affiliation:
Unité Mixte CNRS, Rhône Poulenc, USTL n° 44 Université de Montpellier II Place E. Bataillon 34095 Montpellier Cedex 05
B. Henner
Affiliation:
Unité Mixte CNRS, Rhône Poulenc, USTL n° 44 Université de Montpellier II Place E. Bataillon 34095 Montpellier Cedex 05
D. Leclercq
Affiliation:
Unité Mixte CNRS, Rhône Poulenc, USTL n° 44 Université de Montpellier II Place E. Bataillon 34095 Montpellier Cedex 05
H. Mutin
Affiliation:
Unité Mixte CNRS, Rhône Poulenc, USTL n° 44 Université de Montpellier II Place E. Bataillon 34095 Montpellier Cedex 05
A. Vioux
Affiliation:
Unité Mixte CNRS, Rhône Poulenc, USTL n° 44 Université de Montpellier II Place E. Bataillon 34095 Montpellier Cedex 05
Q. Wang
Affiliation:
Unité Mixte CNRS, Rhône Poulenc, USTL n° 44 Université de Montpellier II Place E. Bataillon 34095 Montpellier Cedex 05
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Abstract

The hydrolysis of organic silicates ( mainly Si(OEt)4: [TEOS] and Si(OMe)4: [TMOS]) is the key reaction in sol gel process for preparation of silica. The mechanism of this reaction is not well known because of the competition taking place between hydrolysis itself and condensation reactions (homo or heterocondensations) but also because of redistribution reactions which take place competitively. Furthermore the competition between these steps depends also on the catalysis (acid,basic or nucleophilic) [1, 3].

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 180: Symposium A – Better Ceramics Through Chemistry IV , 1990 , 3
Copyright
Copyright © Materials Research Society 1990

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References

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