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Following the Reactivity of Au25(SC8H9)18 - Clusters With Pd2+ and Ag+ Ions Using in Situ X-ray Absorption Spectroscopy: A Tale of Two Metals

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dc.contributor.authorShivhare, Atal
dc.contributor.authorLee, Kee Eun
dc.contributor.authorHu, Yongfeng
dc.contributor.authorScott, Robert WJ
dc.date.accessioned2018-11-20T19:20:26Z
dc.date.available2018-11-20T19:20:26Z
dc.date.issued2015
dc.description.abstractThis work examines the reaction between Au25(SC8H9)18– clusters with palladium acetate (Pd2+) and silver nitrate (Ag+) using UV–vis, transmission electron microscopy (TEM), extended X-ray absorption spectroscopy (EXAFS), and in situ liquid cell X-ray absorption spectroscopy (XAS). UV–vis results show that upon the addition of Pd2+ and Ag+ salts to Au25(SC8H9)18– clusters significant changes are seen in the optical properties of the clusters. In the case of Pd, there is little to no change in the size of the clusters evidenced by TEM, while for Ag systems, significant particle growth is seen. In situ XAS results show that Pd2+ reacts with the staple motifs of Au25(SC8H9)18– clusters and forms Pd(II) thiolate species, as shown by the Pd L3- and Au L3-edge data as well as Pd K-edge EXAFS results. However, Ag L3-edge data suggest that Ag+ reduces to Ag on the cluster core and does not form Ag(I) thiolate species. This work highlights the power of using in situ XANES to follow Au cluster transformations in liquid environments.en_US
dc.description.sponsorshipNSERCen_US
dc.description.versionPeer Revieweden_US
dc.identifier.citationA. Shivhare, K. E. Lee, Y. Hu, R. W. J. Scott, J. Phys. Chem. C , 2015, 119, 23279-23284.en_US
dc.identifier.doi10.1021/acs.jpcc.5b07945
dc.identifier.urihttp://hdl.handle.net/10388/11524
dc.publisherAmerican Chemical Societyen_US
dc.subjectClustersen_US
dc.subjectBimetallicen_US
dc.subjectX-ray absorption spectroscopyen_US
dc.subjectIn situen_US
dc.titleFollowing the Reactivity of Au25(SC8H9)18 - Clusters With Pd2+ and Ag+ Ions Using in Situ X-ray Absorption Spectroscopy: A Tale of Two Metalsen_US
dc.typeArticleen_US

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