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

Authors
Boudon, Julien
Dass, Amala
Published in Analytical Chemistry. 2011, vol. 83, no. 13, p. 5056-5061
Abstract Size Exclusion Chromatography (SEC) on a semi-preparative 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 towards Au38(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 and electron microscopy. Most notably, the separation of Au38(SR)24 and Au40(SR)24 clusters is demonstrated.
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Other version: http://pubs.acs.org/doi/abs/10.1021/ac200789v
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KNOPPE, Stefan et al. Size Exclusion Chromatography for Semipreparative Scale Separation of Au 38 (SR) 24 and Au 40 (SR) 24 and Larger Clusters. In: Analytical Chemistry, 2011, vol. 83, n° 13, p. 5056-5061. https://archive-ouverte.unige.ch/unige:16756

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Deposited on : 2011-08-08

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