New catalysts for clean technology

Johnson, B.F.G., Raynor, S.A., Brown, D.B., Shephard, D.S., Mashmeyer, T., Thomas, J.M., Hermans, S., Raja, R. and Sankar, G. (2002) New catalysts for clean technology. Journal of Molecular Catalysis A: Chemical, 182 (1), 89-97. (doi:10.1016/S1381-1169(01)00490-3).

Abstract

The preparation, characterisation and catalytic performance of both bimetallic nanoparticles and chiral homogeneous catalysts anchored along the interior walls of mesoporous silica (MCM-41) are described. The bimetallic nanoparticles are prepared from Ru6Pd6 and Ru6CSn carbonyl clusters and the resulting MCM derivatives are characterised by a number of methods, including EXAFS, FTIR and STEM. The solvent-free hydrogenation of naphthalene and cyclic polyenes using these catalysts are described, with the Ru6CSn based catalyst giving a 90% selectivity for the corresponding monoenes while the Ru6Pd6 produces the fully hydrogenated product in high yield. The homogeneous catalysts 1-[-(R)-1'-2-bis((diphenylphosphino)ferrocenyl]ethyl-N-N'-dimethylethylenediamine palladium dichloride was heterogenised by anchoring along the inside walls of MCM-41. The catalysed reaction between cinnamylacetate and benzylamine was studied and the catalyst produced 51% of the branched chain product possibly with 100%ee.

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Contributors

Author: R. Raja

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