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Issue 42, 2014
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Ultrasmall NHC-coated gold nanoparticles obtained through solvent free thermolysis of organometallic Au(I) complexes

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Abstract

Ultrasmall gold nanoparticles (Au UNPs) represent a unique class of nanomaterials making them very attractive for certain applications. Herein, we developed an organometallic approach to the synthesis of Au UNPs stabilized with the C18H37-NHC ligand by the solvent free thermolysis of [RMIM][Au(C6F5)2] (1) or [Au(C6F5)(RNHC)] (3) (with R = C18H37-), by controlling the reactivity of pentafluorophenyl ligands as deprotonating or reductive elimination agents; Au UNPs can be achieved by solvent free thermolysis. Pentafluorophenyl Au(I) complexes 1 and 3 are synthesized from the corresponding ionic and neutral precursors. The presence of long alkyl chain imidazolium or carbene species in the complexes makes them to behave as isotropic liquids at moderate temperatures. The use of multinuclear NMR allows the description of the mechanism of formation of the UNPs as well as the surface state of the UNPs.

Graphical abstract: Ultrasmall NHC-coated gold nanoparticles obtained through solvent free thermolysis of organometallic Au(i) complexes

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Publication details

The article was received on 16 Jul 2014, accepted on 03 Sep 2014 and first published on 23 Sep 2014


Article type: Communication
DOI: 10.1039/C4DT02160F
Citation: Dalton Trans., 2014,43, 15713-15718
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    Ultrasmall NHC-coated gold nanoparticles obtained through solvent free thermolysis of organometallic Au(I) complexes

    J. Crespo, Y. Guari, A. Ibarra, J. Larionova, T. Lasanta, D. Laurencin, J. M. López-de-Luzuriaga, M. Monge, M. E. Olmos and S. Richeter, Dalton Trans., 2014, 43, 15713
    DOI: 10.1039/C4DT02160F

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