Catalyst design strategies for controlling reactions in microporous and mesoporous molecular-sieves
Catalyst design strategies for controlling reactions in microporous and mesoporous molecular-sieves
Catalytically active transition-metal ions in high oxidation states (CoIII, MnIII, FeIII), have been designed on high-area, molecular-sieve, aluminophosphate microporous solids for the aerobic oxyfunctionalisation of a variety of saturated hydrocarbons. Certain metal-substituted molecular-sieves permit only end-on approach of linear alkanes to the active centres, thereby favouring enhanced reactivity either at one or both of the terminal methyl groups. The size and shape of the pores of the solid molecular-sieve ensure that the oxidations, which proceed by a free-radical mechanism, take place in a highly shape-selective manner in the restricted environment of the catalytically active sites. Anchored bimetallic nanoparticle catalysts display high activity for the low-temperature, selective hydrogenation of cyclic polyenes under solvent-free conditions, and chiral catalysts, derived from 1,1?-bisdiphenylphosphinoferrocene, and anchored within mesoporous silica, display a remarkable increase in both enantioselectivity and activity, in the hydrogenation of E--phenyl cinnamic acid and ethyl nicotinate, when compared to an analogous homogeneous model compound.
regioselective oxidation, enantioselective hydrogenations, aerial oxidation, bimetallic nanoparticles, adipic, air, acid, selective oxidation, performance, heterogeneous catalyst, shape-selective, oxygen, cyclohexane, molecular-sieve catalysts, oxidation
3-14
Raja, Robert
74faf442-38a6-4ac1-84f9-b3c039cb392b
Thomas, John Meurig
f1d9bb61-4e2c-4c4b-8115-953d0f3d36bd
25 March 2002
Raja, Robert
74faf442-38a6-4ac1-84f9-b3c039cb392b
Thomas, John Meurig
f1d9bb61-4e2c-4c4b-8115-953d0f3d36bd
Raja, Robert and Thomas, John Meurig
(2002)
Catalyst design strategies for controlling reactions in microporous and mesoporous molecular-sieves.
Journal of Molecular Catalysis A: Chemical, 181 (1-2), .
(doi:10.1016/S1381-1169(01)00345-4).
Abstract
Catalytically active transition-metal ions in high oxidation states (CoIII, MnIII, FeIII), have been designed on high-area, molecular-sieve, aluminophosphate microporous solids for the aerobic oxyfunctionalisation of a variety of saturated hydrocarbons. Certain metal-substituted molecular-sieves permit only end-on approach of linear alkanes to the active centres, thereby favouring enhanced reactivity either at one or both of the terminal methyl groups. The size and shape of the pores of the solid molecular-sieve ensure that the oxidations, which proceed by a free-radical mechanism, take place in a highly shape-selective manner in the restricted environment of the catalytically active sites. Anchored bimetallic nanoparticle catalysts display high activity for the low-temperature, selective hydrogenation of cyclic polyenes under solvent-free conditions, and chiral catalysts, derived from 1,1?-bisdiphenylphosphinoferrocene, and anchored within mesoporous silica, display a remarkable increase in both enantioselectivity and activity, in the hydrogenation of E--phenyl cinnamic acid and ethyl nicotinate, when compared to an analogous homogeneous model compound.
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Published date: 25 March 2002
Keywords:
regioselective oxidation, enantioselective hydrogenations, aerial oxidation, bimetallic nanoparticles, adipic, air, acid, selective oxidation, performance, heterogeneous catalyst, shape-selective, oxygen, cyclohexane, molecular-sieve catalysts, oxidation
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Local EPrints ID: 54162
URI: http://eprints.soton.ac.uk/id/eprint/54162
PURE UUID: b9cbafaf-ae91-42de-9064-96fd8756f7d5
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Date deposited: 29 Jul 2008
Last modified: 16 Mar 2024 03:51
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Author:
John Meurig Thomas
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