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Direct cross-linking of silyl-functionalized cage siloxanes via nonhydrolytic siloxane bond formation for preparing nanoporous materials.
- Source :
-
Dalton transactions (Cambridge, England : 2003) [Dalton Trans] 2024 Apr 02; Vol. 53 (14), pp. 6256-6263. Date of Electronic Publication: 2024 Apr 02. - Publication Year :
- 2024
-
Abstract
- Bottom-up synthesis of siloxane-based nanoporous materials from siloxane oligomers is promising for constructing well-defined structures at a molecular level. Herein, we report the synthesis of nanoporous materials consisting of cage-type siloxanes through the nonhydrolytic siloxane bond formation reaction. Cage siloxanes with double- n -ring geometries ( n = 4 or 6) modified with dimethylsilyl and dimethylethoxysilyl groups are synthesized and directly cross-linked using a B(C <subscript>6</subscript> F <subscript>5</subscript> ) <subscript>3</subscript> catalyst, resulting in the formation of porous networks composed of alternating cage siloxane nodes and tetramethyldisiloxane (-SiMe <subscript>2</subscript> OSiMe <subscript>2</subscript> -) linkers. Compared with conventional hydrolysis and polycondensation reactions of alkoxysilyl-modified cage siloxanes under acid conditions, the non-hydrolytic condensation reaction was found favorable for the formation of porous siloxane networks without unwanted cleavage of the siloxane bonds.
Details
- Language :
- English
- ISSN :
- 1477-9234
- Volume :
- 53
- Issue :
- 14
- Database :
- MEDLINE
- Journal :
- Dalton transactions (Cambridge, England : 2003)
- Publication Type :
- Academic Journal
- Accession number :
- 38501342
- Full Text :
- https://doi.org/10.1039/d4dt00215f