Primary amine functionalized silica sol-gels were prepared by a basic sol-gel process in water. The preparation was done by utilizing tetraethyl orthosilicate, or TEOS. They were then functionalized by (3-aminopropyl)triethoxysilane, or APTS, which produced the primary amines on the surface of the sol-gel. In order to provide efficient functionalization of the silica sol-gels, there was a high ratio of APTS/TEOS. From this, the reactivity of these functionalized amine groups were tested by reacting them with carboxylic acid to form a covalently bonded amide. This was monitored by Fourier transformation infrared spectroscopy, or FTIR. Once the reactivity is confirmed, these sol-gels can be applied to immobilize the polymerization catalyst used in ring opening metathesis polymerization, or ROMP, aiding in the purification through simple filtration procedures.

Synthesis and analysis of primary amine functionalized silica sol-gels for catalyst extraction

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

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