X-ray absorption spectroscopy of phosphine-capped Au clusters

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dc.contributor.authorSharma, SKen_AU
dc.contributor.authorJohannessen, Ben_AU
dc.contributor.authorGolovko, VBen_AU
dc.contributor.authorMarshall, ATen_AU
dc.date.accessioned2025-10-03T04:05:42Zen_AU
dc.date.available2025-10-03T04:05:42Zen_AU
dc.date.issued2023-04-28en_AU
dc.date.statistics2025-07-16en_AU
dc.description.abstractThe structural determination of ultrasmall clusters remains a challenge due to difficulties in crystallisation. Often the atomically precise clusters undergo structural change under the influence of the environment. X-ray absorption spectroscopy (XAS) can be an attractive tool to study the electronic and geometric properties of such clusters deposited onto various supports under in situ conditions. Herein, [Au6(dppp)4](NO3)2, [Au9(PPh3)8](NO3)3, [Au13(dppe)5Cl2]Cl3, and Au101(PPPh3)21Cl5 clusters were studied using XAS. The clusters exhibited distinct features compared to bulk gold. XANES results show a systematic increase in the absorption edge energy and white line intensity, with a decrease in cluster nuclearity. The EXAFS of clusters are sensitive to nuclearity and ligands and were fitted with their known crystal structures. This study advances the understanding of the phosphine-ligated metal clusters relevant to practical applications in catalysis and sensing. © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.en_AU
dc.description.sponsorshipThis research was undertaken on the X-ray absorption spectroscopy beamline at the Australian Synchrotron, part of ANSTO, grant M16325. Shailendra Kumar Sharma thanks the University of Canterbury for the UC Connect Ph.D. scholarship.en_AU
dc.identifier.articlenumber191en_AU
dc.identifier.citationSharma, S. K., Johannessen, B., Golovko, V. B., & Marshall, A. T. (2023). X-ray absorption spectroscopy of phosphine-capped Au clusters. Inorganics, 11(5), 191. doi:10.3390/inorganics11050191en_AU
dc.identifier.issn2304-6740en_AU
dc.identifier.issue5en_AU
dc.identifier.journaltitleInorganicsen_AU
dc.identifier.urihttps://doi.org/10.3390/inorganics11050191en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16593en_AU
dc.identifier.volume11en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherMDPIen_AU
dc.subjectAbsorptionen_AU
dc.subjectSpectroscopyen_AU
dc.subjectGolden_AU
dc.subjectPhosphinesen_AU
dc.subjectChlorineen_AU
dc.subjectCrystal structureen_AU
dc.subjectNanoparticlesen_AU
dc.subjectSynthesisen_AU
dc.subjectX-ray photoelectron spectroscopyen_AU
dc.titleX-ray absorption spectroscopy of phosphine-capped Au clustersen_AU
dc.typeJournal Articleen_AU
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