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Covalent Grafting of Organoalkoxysilanes on Silica Surfaces in Water-Rich Medium as Evidenced by 29Si NMR

Published online by Cambridge University Press:  17 March 2011

Christian Bonhomme ,
Sophie De Monredon ,
François Ribot  and
Florence Babonneau
Christian Bonhomme
Affiliation:
Laboratoire chimie de la matière condensée, Universite P et M Curie, 4 place Jussieu, Paris, France
Sophie De Monredon
Affiliation:
Laboratoire chimie de la matière condensée, Universite P et M Curie, 4 place Jussieu, Paris, France
François Ribot
Affiliation:
Laboratoire chimie de la matière condensée, Universite P et M Curie, 4 place Jussieu, Paris, France
Florence Babonneau
Affiliation:
Laboratoire chimie de la matière condensée, Universite P et M Curie, 4 place Jussieu, Paris, France
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Abstract

Despite the huge amount of experimental investigations dedicated to the grafting of organoalkoxysilanes on silica, the characterization of covalent linkages remains a difficult task from a spectroscopic point of view. In most cases, the formation of a covalent link is taken for granted and not discussed. 29Si NMR, IR or UV spectroscopies are commonly used to study the modification of silica surface. Herein we report an unambiguous method to evidence the formation of covalent links. It is based on NMR spectroscopy analysis coupled with a rigorous synthetic grafting protocol.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1007: Symposium S – Organic/Inorganic Hybrid Materials-2007 , 2007 , 1007-S09-04
Copyright
Copyright © Materials Research Society 2007

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References

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