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hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorMONGIN, Cédric
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorPIANET, Isabelle
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorJONUSAUSKAS, Gediminas
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorBASSANI, Dario M.
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorBIBAL, Brigitte
dc.date.created2014-10-17
dc.date.issued2015
dc.identifier.issn2155-5435
dc.description.abstractEnWe report a photocatalyst composed of a diphenylanthracene core appended with two lipophilic thioether side-chains that binds gold(III) chloride. Upon excitation using visible light, the AuIII ions are smoothly reduced to AuI which, in the presence of water, lead to the formation of crystalline gold nanoparticles of 20–50 nm diameter that are devoid of sulfur-containing capping agents. Ultrafast transient absorption spectroscopy shows that the anthracene excited state is quenched with a rate k = 3.5 × 1010 s–1, assigned to intramolecular energy transfer to the bound gold ions, which then oxidizes the solvent to produce an intermediate low-valency gold(I) species. In the absence of water, the latter is stable and can be used as a homogeneous AuI catalyst. When employed in a biphasic reactor, the photocatalyst shows average turnover numbers of 150 atoms of AuIII reduced to Au0 per molecule of photocatalyst.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.rights.urihttp://creativecommons.org/licenses/by-sa/
dc.subject.engold
dc.subject.ennanoparticle
dc.subject.enphotocatalyst
dc.subject.endiphenylanthracene
dc.subject.enhomogenous catalysis
dc.title.enSupramolecular Photocatalyst for the Reduction of Au(III) to Au(I) and High-Turnover Generation of Gold Nanocrystals
dc.typeArticle de revue
dc.identifier.doi10.1021/cs5016063
dc.subject.halChimie/Catalyse
dc.subject.halChimie/Chimie de coordination
bordeaux.journalACS Catalysis
bordeaux.page380-387
bordeaux.volume5
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-01119898
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01119898v1
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