Size Exclusion Chromatography for Semipreparative Scale Separation of Au38(SR)24 and Au40(SR)24 and Larger Clusters

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 Au38(SR)24 (SR, thiolate) clusters were separated and gai...

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Published inAnalytical chemistry (Washington) Vol. 83; no. 13; pp. 5056 - 5061
Main Authors Knoppe, Stefan, Boudon, Julien, Dolamic, Igor, Dass, Amala, Bürgi, Thomas
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 01.07.2011
Subjects
Analytical chemistry
Chemical Sciences
Chemistry
Chromatographic methods and physical methods associated with chromatography
Exact sciences and technology
Other chromatographic methods
Spectrometric and optical methods
Nanocluster
Gold
Size
Thiolate
Use
HPLC chromatography
Matrix assisted laser desorption ionization
Mass spectrometry
Mixture
Electron spectrometry
Gel permeation chromatography
Ultraviolet visible spectrometry
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Summary: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 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, HPLC, and electron microscopy. Most notably, the separation of Au38(SR)24 and Au40(SR)24 clusters is demonstrated.
Bibliography:content type line 23
SourceType-Scholarly Journals-1
ObjectType-Correspondence-1
ISSN:0003-2700
1520-6882
1520-6882
DOI:10.1021/ac200789v