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Issue 18, 2011
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Synthesis and characterisation of (hydroxypropyl)-2-aminomethyl pyridine containing hybrid polymersilica SBA-15 materials supporting Mo(VI) centres and their use as heterogeneous catalysts for oct-1-ene epoxidation

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Abstract

Hybrid organic–inorganic amino alcohol containing PGMA–SBA-15 materials have been prepared by first tethering poly(glycidyl methacrylate) (PGMA) chains onto the surface of SBA-15 materials using the atom transfer radical polymerization (ATRP) technique. The procedure involves the functionalization of silica-based SBA-15 materials with aminopropyl groups and 2-bromo-2 methylpropionyl bromide to form ATRP initiator species. Subsequent graft ATRP of glycidyl methacrylate leads to a large decrease of the textural properties in the final material, but nevertheless, the use of the ultra large pore SBA-15 support is beneficial for the achievement of porous hybrid organic–inorganic materials. Reaction of the glycidyl pendant groups in the tethered PGMA chains with 2-aminomethyl pyridine allows the formation of the (hydroxypropyl)-2-aminomethyl pyridine ligands to which molybdenum(VI) species catalytically active for epoxidation of terminal alkenes are bound. The materials thus prepared display high catalytic activity and excellent stability and reusability in the epoxidation of 1-octene with TBHP as oxidant. The presence of mesoporosity in the final Mo(VI)-containing hybrid materials boosts the catalytic activity of supported metal centres.

Graphical abstract: Synthesis and characterisation of (hydroxypropyl)-2-aminomethyl pyridine containing hybrid polymer–silica SBA-15 materials supporting Mo(vi) centres and their use as heterogeneous catalysts for oct-1-ene epoxidation

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Publication details

The article was received on 16 Dec 2010, accepted on 04 Mar 2011 and first published on 31 Mar 2011


Article type: Paper
DOI: 10.1039/C0JM04416D
J. Mater. Chem., 2011,21, 6725-6735

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    Synthesis and characterisation of (hydroxypropyl)-2-aminomethyl pyridine containing hybrid polymersilica SBA-15 materials supporting Mo(VI) centres and their use as heterogeneous catalysts for oct-1-ene epoxidation

    J. Moreno, J. Iglesias, J. A. Melero and D. C. Sherrington, J. Mater. Chem., 2011, 21, 6725
    DOI: 10.1039/C0JM04416D

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