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Single-site heterogeneous catalysts

Single-site heterogeneous catalysts
Single-site heterogeneous catalysts
Intellectually, the advantages that flow from the availability of single-site heterogeneous catalysts (SSHC) are many. They facilitate the determination of the kinetics and mechanism of catalytic turnover—both experimentally and computationally—and make accessible the energetics of various intermediates (including short-lived transition states). These facts in turn offer a rational strategic principle for the design of new catalysts and the improvement of existing ones. It is generally possible to prepare soluble molecular fragments that circumscribe the single-site, thus enabling a direct comparison to be made, experimentally, between the catalytic performance of the same active site when functioning as a heterogeneous (continuous solid) as well as a homogeneous (dispersed molecular) catalyst. This approach also makes it possible to modify the immediate atomic environment as well as the central atomic structure of the active site. From the practical standpoint, SSHC exhibit very high selectivities leading to the production of sharply defined molecular products, just as do their homogeneous analogues. Given that mesoporous silicas with very large internal surface areas are ideal supports for SSHC, and that more than a quarter of the elements of the Periodic Table may be grafted as active sites onto such silicas, there is abundant scope for creating new catalytic opportunities.

asymmetric catalysts, heterogeneous catalysts, nanoparticles, nanoporous solids, single-site catalysts
1433-7851
6456-6482
Thomas, John Meurig
f1d9bb61-4e2c-4c4b-8115-953d0f3d36bd
Raja, Robert
74faf442-38a6-4ac1-84f9-b3c039cb392b
Lewis, Dewi W.
22bb3bd7-0820-4368-9bfa-373894c608af
Thomas, John Meurig
f1d9bb61-4e2c-4c4b-8115-953d0f3d36bd
Raja, Robert
74faf442-38a6-4ac1-84f9-b3c039cb392b
Lewis, Dewi W.
22bb3bd7-0820-4368-9bfa-373894c608af

Thomas, John Meurig, Raja, Robert and Lewis, Dewi W. (2005) Single-site heterogeneous catalysts. Angewandte Chemie International Edition, 44 (40), 6456-6482. (doi:10.1002/anie.200462473).

Record type: Article

Abstract

Intellectually, the advantages that flow from the availability of single-site heterogeneous catalysts (SSHC) are many. They facilitate the determination of the kinetics and mechanism of catalytic turnover—both experimentally and computationally—and make accessible the energetics of various intermediates (including short-lived transition states). These facts in turn offer a rational strategic principle for the design of new catalysts and the improvement of existing ones. It is generally possible to prepare soluble molecular fragments that circumscribe the single-site, thus enabling a direct comparison to be made, experimentally, between the catalytic performance of the same active site when functioning as a heterogeneous (continuous solid) as well as a homogeneous (dispersed molecular) catalyst. This approach also makes it possible to modify the immediate atomic environment as well as the central atomic structure of the active site. From the practical standpoint, SSHC exhibit very high selectivities leading to the production of sharply defined molecular products, just as do their homogeneous analogues. Given that mesoporous silicas with very large internal surface areas are ideal supports for SSHC, and that more than a quarter of the elements of the Periodic Table may be grafted as active sites onto such silicas, there is abundant scope for creating new catalytic opportunities.

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More information

Published date: 14 October 2005
Keywords: asymmetric catalysts, heterogeneous catalysts, nanoparticles, nanoporous solids, single-site catalysts
Organisations: Chemistry

Identifiers

Local EPrints ID: 148323
URI: http://eprints.soton.ac.uk/id/eprint/148323
ISSN: 1433-7851
PURE UUID: 3d3bd35f-9188-410f-858f-1331cd79f2b1
ORCID for Robert Raja: ORCID iD orcid.org/0000-0002-4161-7053

Catalogue record

Date deposited: 29 Jun 2010 08:32
Last modified: 07 Oct 2020 08:15

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Contributors

Author: John Meurig Thomas
Author: Robert Raja ORCID iD
Author: Dewi W. Lewis

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