Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume 2021, Issue 19, Pages 1836-1845Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.202100050
Keywords
Layered compounds; Mesoporous materials; Organotriethoxysilane; Silylation; Tetrabutylammonium fluoride (TBAF)
Categories
Funding
- ANR [ANR-15-JTIC-0003-01]
- ANR (Agence Nationale de la Recherche)
- JST (Japan Science and Technology Agency) [ANR-15-JTIC-0003-01]
- JSPS
- DFG
- MEXT [18J22738]
- Agence Nationale de la Recherche (ANR) [ANR-15-JTIC-0003] Funding Source: Agence Nationale de la Recherche (ANR)
- Grants-in-Aid for Scientific Research [18J22738] Funding Source: KAKEN
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In this study, interlayer silylation of Na-Oct with various organoalkoxysilanes was conducted using C(16)TMA-Oct as an intermediate, with or without TBAF. The addition of TBAF increased the degree of silylation, possibly due to nucleophilic attack by F- ions. MPTES exhibited higher reactivity in silylation reactions, indicating better accessibility to the interlayer polar region of C(16)TMA-Oct.
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 (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 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.
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