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New catalysts for clean technology.
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL.
(pp. 89 - 97).
ELSEVIER SCIENCE BV
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](ethylN-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. (C) 2002 Published by Elsevier Science B.V.
|Title:||New catalysts for clean technology|
|Event:||10th International Symposium on Relations between Homogeneous and Heterogeneous Catalysis|
|Dates:||2001-07-02 - 2001-07-06|
|Keywords:||mesoporous silica, chiral catalysis, metal clusters, nanoparticles, MESOPOROUS SILICA, HIGH-RESOLUTION, IN-SITU, PERFORMANCE, PRECURSORS, COMPLEXES, COPPER|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences
UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry
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