Premium
Interlayer Silylation of Layered Octosilicate with Organoalkoxysilanes: Effects of Tetrabutylammonium Fluoride as a Catalyst and the Functional Groups of Silanes
Author(s) -
Yatomi Masashi,
Koike Masakazu,
Rey Nadège,
Murakami Yuki,
Saito Shohei,
Wada Hiroaki,
Shimojima Atsushi,
Portehault David,
Carenco Sophie,
Sanchez Clément,
Carcel Carole,
Wong Chi Man Michel,
Kuroda Kazuyuki
Publication year - 2021
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202100050
Subject(s) - silylation , silanes , tetrabutylammonium fluoride , chemistry , nucleophile , fluoride , catalysis , reactivity (psychology) , inorganic chemistry , nucleophilic addition , polymer chemistry , organic chemistry , silane , medicine , alternative medicine , pathology
Interlayer silylation of layered sodium octosilicate (Na‐Oct) with various organoalkoxysilanes was conducted using hexadecyltrimethylammonium ion‐exchanged layered octosilicate (C 16 TMA‐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. C 16 TMA‐Oct was silylated with octyltriethoxysilane (C 8 TES) 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 C 16 TMA‐Oct was observed with MPTES, suggesting the higher accessibility of this silylating agent into the interlayer polar region of C 16 TMA‐Oct. Overall TBAF appears as a relevant catalyst for the covalent interlayer surface modification of layered silicates with organic functional groups.