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Direct Synthesis of N-Heterocyclic Carbene-Stabilized Copper Nanoparticles from a N-Heterocyclic Carbene-Borane

Abstract : N‐Heterocyclic carbene(NHC)‐stabilized copper nanoparticles are synthesized using a NHC‐borane and mesitylcopper(I) in thermal conditions (refluxing toluene for 2.5 h). Nanoparticles (NPs) with a size distribution of 11.6 ± 1.8 nm were obtained. The interaction between Cu NPs and NHC ligands was probed by XPS, showing the covalent binding of the NHC to the surface of the nanoparticles. Mechanistic studies suggest that the NHC‐borane plays two roles: contributing to the reduction of [CuMes]2 to release Cu0 species and providing NHC ligands to stabilize the copper nanoparticles
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Submitted on : Thursday, June 27, 2019 - 3:29:23 PM
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Xavier Frogneux, Laura Hippolyte, Dimitri Mercier, David Portehault, Corinne Chanéac, et al.. Direct Synthesis of N-Heterocyclic Carbene-Stabilized Copper Nanoparticles from a N-Heterocyclic Carbene-Borane. Chemistry - A European Journal, Wiley-VCH Verlag, 2019, 25 (49), pp.11481-11485. ⟨10.1002/chem.201901534⟩. ⟨hal-02167204⟩

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