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N-heterocyclic carbene-stabilized gold nanoparticles with tunable sizes

Abstract

A simple and straightforward synthesis of N-heterocyclic carbene (NHC)-protected gold nanoparticles is presented 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 delivering 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

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Publication details

The article was received on 31 Jan 2018, accepted on 10 Apr 2018 and first published on 16 Apr 2018


Article type: Paper
DOI: 10.1039/C8DT00416A
Citation: Dalton Trans., 2018, Accepted Manuscript
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    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. Chaneac and F. Ribot, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT00416A

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