1. Interlayer Silylation of Layered Octosilicate with Organoalkoxysilanes: Effects of Tetrabutylammonium Fluoride as a Catalyst and the Functional Groups of Silanes.
- Author
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Masashi Yatomi, Masakazu Koike, Rey, Nadège, Yuki Murakami, Shohei Saito, Hiroaki Wada, Atsushi Shimojima, Portehault, David, Sophie Carenco, Sanchez, Clément, Carcel, Carole, Wong Chi Man, Michel, and Kazuyuki Kuroda
- Subjects
SILYLATION ,FUNCTIONAL groups ,SILANE compounds ,CATALYSTS ,ALKOXYSILANES - Abstract
Interlayer silylation of layered sodium octosilicate (Na-Oct) with various organoalkoxysilanes was conducted using hexadecyltrimethylammonium ion-exchanged layered octosilicate (C16TMA-Oct) as an intermediate in the presence or absence of tetrabutylammonium fluoride (TBAF). The degree of silylation was increased by adding TBAF. It is suggested that F
- ions perform a nucleophilic attack on the alkoxysilanes, which promotes the silylation reaction. C16 TMA-Oct was silylated with octyltriethoxysilane (C8TES) or 3-mercaptopropyltriethoxysilane (MPTES) to compare the reactivity of the two organoalkoxysilanes in the presence or absence of TBAF. A higher degree of silylation of C16 TMA-Oct was observed with MPTES, suggesting the higher accessibility of this silylating agent into the interlayer polar region of C16 TMA-Oct. Overall TBAF appears as a relevant catalyst for the covalent interlayer surface modification of layered silicates with organic functional groups. [ABSTRACT FROM AUTHOR]- Published
- 2021
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