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Issue 32, 2015
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[Au5Mes5]: improved gram-scale synthesis and its use as a convenient precursor for halide-free supported gold nanoparticles

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Abstract

A simple one-step and gram-scale synthesis of [Au5Mes5] from AuCl3 was developed, and this molecular precursor was used to generate Au nanoparticles on SiO2 and Al2O3. While [Au5Mes5] does not react with surface silanols and is only physisorbed, its incipient wetness impregnation followed by H2 treatment leads to a narrow size distribution of 1.4 nm Au nanoparticles. In contrast, [Au5Mes5] reacts with partially dehydroxylated Al2O3 to directly yield 1 nm Au nanoparticles along with adsorbed species. A subsequent treatment under hydrogen leads to a narrow size distribution of smaller 0.8 nm Au particles.

Graphical abstract: [Au5Mes5]: improved gram-scale synthesis and its use as a convenient precursor for halide-free supported gold nanoparticles

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Supplementary files

Article information


Submitted
15 Apr 2015
Accepted
30 Jun 2015
First published
06 Jul 2015

Dalton Trans., 2015,44, 14349-14353
Article type
Paper
Author version available

[Au5Mes5]: improved gram-scale synthesis and its use as a convenient precursor for halide-free supported gold nanoparticles

G. Siddiqi, V. Mougel and C. Copéret, Dalton Trans., 2015, 44, 14349
DOI: 10.1039/C5DT01432H

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