Preparation, characterisation and application of polyaminesilica hybrids in the epoxidation of ,-unsaturated olefins

Author: Mdoe J.E.G.

Source: Bulletin of the Chemical Society of Ethiopia, Volume 16, Number 1, 1 June 2002 , pp. 103-112(10)

Publisher: Chemical Society of Ethiopia

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Abstract:

Polyamine-silica hybrids were prepared by a one-pot sol-gel method via a neutral amine templating route. At low loadings (ca. 1 mmol organic group per g of silica) the resultant materials displayed properties typical of M41S-type materials, namely, high surface area (typically 600 m² g^-1) and controlled porosity with an average pore diameter of 3.6 nm. However, the materials were amorphous at loading above 1.2 mmol organic group per g of silica. The materials were used as heterogeneous base catalysts in the epoxidation of electron deficient olefins. The yields of the epoxide product ranged between 52% and 76%, depending on the loading of the catalytic group.

Keywords: POLYAMINE-SILICA HYBRIDS; HETEROGENEOUS BASE CATALYSTS; EPOXIDATION OF ALPHA BETA-UNSATURATED OLEFINS

Document Type: Research article

Publication date: 2002-06-01

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