6533b7d7fe1ef96bd12684f7

RESEARCH PRODUCT

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

Amala DassStefan KnoppeThomas BürgiIgor DolamicJulien Boudon

subject

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

description

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.

yearjournalcountryeditionlanguage
2011-05-26
10.1021/ac200789vhttps://archive-ouverte.unige.ch/unige:16756