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Issue 19, 2018
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N-Heterocyclic carbene-stabilized gold nanoparticles with tunable sizes

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Abstract

A simple and straightforward synthesis of N-heterocyclic carbene (NHC)-protected gold nanoparticles is derived from (benz)imidazolium-AuX4 complexes and NaBH4 only. The proposed method allows size tuning, from 3 to 6 nm, by adding (benz)imidazolium bromide. Changing the reducing agent to tBuNH2BH3 shifts the size range to ca. 6–12 nm. A one pot protocol is also reported from AuCl, (benz)imidazolium bromides and NaBH4, thereby providing an even more straightforward way of producing NHC-capped gold nanoparticles. In addition, X-ray photoelectron spectroscopy (XPS) is used to unambiguously evidence, on the nanoparticles, the covalent bond formed between the NHC and the surface gold atoms.

Graphical abstract: N-Heterocyclic carbene-stabilized gold nanoparticles with tunable sizes

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Article information


Submitted
31 Jan 2018
Accepted
10 Apr 2018
First published
16 Apr 2018

Dalton Trans., 2018,47, 6850-6859
Article type
Paper

N-Heterocyclic carbene-stabilized gold nanoparticles with tunable sizes

N. Bridonneau, L. Hippolyte, D. Mercier, D. Portehault, M. Desage-El Murr, P. Marcus, L. Fensterbank, C. Chanéac and F. Ribot, Dalton Trans., 2018, 47, 6850
DOI: 10.1039/C8DT00416A

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