Identity of the Active Site in Gold Nanoparticle-Catalyzed Sonogashira Coupling of Phenylacetylene and Iodobenzene

Beaumont, Simon K.; Kyriakou, Georgios; Lambert, Richard M.

doi:10.1021/ja1063179

Identity of the Active Site in Gold Nanoparticle-Catalyzed Sonogashira Coupling of Phenylacetylene and Iodobenzene

Beaumont, Simon K.; Kyriakou, Georgios; Lambert, Richard M.

Authors

Dr Simon Beaumont simon.beaumont@durham.ac.uk
Associate Professor

Georgios Kyriakou

Richard M. Lambert

Abstract

XPS, TEM, and reaction studies were used to examine the catalytic behavior of gold species deposited on lanthana toward the cross-coupling of phenylacetylene and odobenzene. Atomically dispersed AuI and AuIII were catalytically inert, whereas metallic Au0 nanoparticles were both active and very selective. Thus it is metallic gold and not ionic gold that provides the catalytically active sites. Au0 nanoparticles supported on silica, γ-alumina, and BaO were active but relatively unselective; however, as with lanthana, ceria-supported Au0 nanoparticles showed high selectivity. This strong promoting effect of the lanthanide oxide supports on Sonogashira selectivity cannot be accounted for in terms of acid/base, redox, or SMSI effects; it may be tentatively ascribed to metalfsupport hydrogen spillover.

Citation

Beaumont, S. K., Kyriakou, G., & Lambert, R. M. (2010). Identity of the Active Site in Gold Nanoparticle-Catalyzed Sonogashira Coupling of Phenylacetylene and Iodobenzene. Journal of the American Chemical Society, 132(35), 12246-12248. https://doi.org/10.1021/ja1063179

Journal Article Type	Article
Publication Date	Sep 8, 2010
Deposit Date	Nov 27, 2012
Publicly Available Date	Apr 24, 2014
Journal	Journal of the American Chemical Society
Print ISSN	0002-7863
Electronic ISSN	1520-5126
Publisher	American Chemical Society
Peer Reviewed	Peer Reviewed
Volume	132
Issue	35
Pages	12246-12248
DOI	https://doi.org/10.1021/ja1063179

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This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of the American Chemical Society, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/ja1063179.