Covalent immobilization of polyoxotungstate on alumina and its catalytic generation of sulfoxides

Hong, L., Win, P., Zhang, X., Chen, W., Miras, H. N. and Song, Y.-F. (2016) Covalent immobilization of polyoxotungstate on alumina and its catalytic generation of sulfoxides. Chemistry: A European Journal, 22(32), pp. 11232-11238. (doi: 10.1002/chem.201601864) (PMID:27400134)

Abstract

The structural and chemical stabilities of immobilized polyoxometalate (POM)-containing catalysts are crucial factors for their industrial application. An alumina supported POM catalyst is prepared by using a facile condensation reaction between the trilacunary POM Na12[α-P2W15O56]⋅24 H2O (P2W15) and the hydroxy groups on the surface of γ-Al2O3 spheres under acidic conditions. The heterogeneous catalyst P2W15−Al2O3 is characterized by a wide variety of techniques and shows excellent stability and highly efficient reactivity and selectivity for the oxygenation of thioethers to sulfoxides, which are a very useful intermediate in organic synthesis and the industrial preparation of drugs. Furthermore, P2W15−Al2O3 can be recycled and reused at least ten times without any observable loss of its catalytic efficiency, mainly due to the covalent immobilization and high dispersion of P2W15 on the γ-Al2O3 surface.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Moiras, Professor Haralampos
• Authors: Hong, L., Win, P., Zhang, X., Chen, W., Miras, H. N., and Song, Y.-F.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: Chemistry: A European Journal
• Publisher: Wiley
• ISSN: 0947-6539
• ISSN (Online): 1521-3765
• Published Online: 11 July 2016
• Copyright Holders: Copyright © 2016 Wiley
• First Published: First published in Chemistry: A European Journal 22(32):11232-11238
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher