Supported catalysts from polymerizable transition metal complexes
โ Scribed by Piero Mastrorilli; Cosimo Francesco Nobile
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 375 KB
- Volume
- 248
- Category
- Article
- ISSN
- 0010-8545
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โฆ Synopsis
This review covers the last 12 years of research on the synthesis and use of heterogeneous catalysts obtained by co-polymerization of suitable metal containing monomers (MCM). The catalytic applications of these supported metal complexes are subdivided into three areas. Hydrogenation of alkenes and functionalized olefins are covered first. Oxidation of several substrates such as olefins, sulfides, alcohols, and aldehydes are then considered. Of particular interest in this framework is the use of chiral salen metal containing monomers for the stereoselective epoxidation of hindered olefins. Alkene and alkyne polymerizations, Heck and Heck-type reactions, allylic alkylation, and Michael additions are discussed in the field of carbon-carbon bond forming reactions. A common factor emerging from this survey is the application of metal containing monomers for the synthesis of molecularly imprinted polymers to be used as catalysts or catalyst supports.
๐ SIMILAR VOLUMES
Zeolite supported metal catalysts are prepared by ion exchange or incipient wetness impregnation, or by deposition of metal complexes, followed by calcination and reduction. Hydrogen reduction of encaged transition metal ions yields metal clusters or isolated atoms and protons of high Brlansted acid
Functionalized polymers are found to be highly efยฎcient in immobilizing transition metal ions. Crosslinked polystyrene supported Schiff's base complexes of metal ions such as Fe(III), Co(II), Ni(II) and Cu(II) are very effective as heterogeneous catalysts. The catalytic activity of these metal compl
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