Size-controlled synthesis of thiol-derivatized gold clusters
- 26 March 2003
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry
- Vol. 13 (5) , 1038-1041
- https://doi.org/10.1039/b300320p
Abstract
Thiol-derivatized gold clusters (i.e. nano-sized gold crystals coated with a thiolate monolayer, Aun(SR)m, with m ≪ n) based on n-alkanethiols have been obtained by treatment of gold clusters embedded in poly(N-vinylpyrrolidone) (PVP) with thiols. Dodecanethiol (DDT), hexadecanethiol (HDT), and octadecanethiol (ODT) have been used. The polymer-embedded clusters were obtained by reduction of AuCl4 − with ethylene glycol at temperatures ranging from 60 to 110 °C, in the presence of PVP as a stabilizer. This new synthesis route provides complete control over the cluster compound structure, since a variety of alkanethiol molecules can be used and the metal core size can be accurately varied by changing the reactive mixture composition (the PVP/HAuCl4 weight ratio). The obtained Au–DDT, Au–HDT, and Au–ODT compounds show a hydrophobic nature, are crystalline, and are thermally stable up to ca. 300 °C.Keywords
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