0000000000299345

AUTHOR

Igor Dolamic

showing 2 related works from this author

Size Exclusion Chromatography for Semipreparative Scale Separation of Au 38 (SR) 24 and Au 40 (SR) 24 and Larger Clusters

2011

Size exclusion chromatography (SEC) on a semipreparative scale (10 mg and more) was used to size-select ultrasmall gold nanoclusters (2 nm) from polydisperse mixtures. In particular, the ubiquitous byproducts of the etching process toward Au(38)(SR)(24) (SR, thiolate) clusters were separated and gained in high monodispersity (based on mass spectrometry). The isolated fractions were characterized by UV-vis spectroscopy, MALDI mass spectrometry, HPLC, and electron microscopy. Most notably, the separation of Au(38)(SR)(24) and Au(40)(SR)(24) clusters is demonstrated.

ChromatographyChemistrySize-exclusion chromatographyAnalytical chemistry02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnologyMass spectrometry01 natural sciencesHigh-performance liquid chromatography0104 chemical sciencesAnalytical ChemistryNanoclusterslaw.inventionGel permeation chromatographyMatrix-assisted laser desorption/ionizationlawddc:540Electron microscope0210 nano-technologySpectroscopy
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Pd2Au36(SR)(24) cluster: structure studies

2015

The location of the Pd atoms in Pd2Au36(SC2H4Ph)(24), is studied both experimentally and theoretically. X-ray photoelectron spectroscopy (XPS) indicates oxidized Pd atoms. Palladium K-edge extended X-ray absorption fine-structure (EXAFS) data clearly show Pd-S bonds, which is supported by far infrared spectroscopy and by comparing theoretical EXAFS spectra in R space and circular dichroism spectra of the staple, surface and core doped structures with experimental spectra.

spectroscopyAtomsElectronic-propertiesnanoclustersMass-spectrometrychemistry.chemical_elementNanotechnologyCrystal structureSpectral lineÀtomsCondensed Matter::Materials ScienceX-ray photoelectron spectroscopyOptical-propertiesCondensed Matter::SuperconductivityRay-absorption spectroscopyCluster (physics):Física::Electromagnetisme [Àrees temàtiques de la UPC]General Materials ScienceGold nanoclustersta116Theoretical-analysista114Extended X-ray absorption fine structureDopingProtected au-25 nanoclustersEspectroscòpia de raigs XCrystallographyLigand-exchangechemistryCrystal-structureddc:540X-ray spectroscopyNanoparticles:Física::Física molecular [Àrees temàtiques de la UPC]Absorption (chemistry)Palladium
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