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Issue 24, 2014
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Unexpected bond activations promoted by palladium nanoparticles

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Thioether-phosphines, 1 and 2, were applied for the stabilisation of palladium nanoparticles (PdNPs) synthesised by a bottom-up methodology, using [Pd2(dba)3] as an organometallic precursor. For the phenyl containing ligand 1, small (dmean = 1.6 nm), well-defined and dispersed nanoparticles were obtained; however, ligand 2 involving a long alkyl chain led to agglomerates. NMR and GC-MS analyses throughout the synthesis of the nanomaterials revealed partial cleavage of ligands by C–S and C–P bond activations, and XPS spectra of the isolated nanoparticles indicated the presence of both thioether-phosphines and their fragments on the metallic surface. Reactivity studies of molecular palladium systems as well as on extended palladium surfaces pointed out that cluster entities are responsible for C-heteroatom activations, triggering structure modifications of stabilisers during the synthesis of PdNPs.

Graphical abstract: Unexpected bond activations promoted by palladium nanoparticles

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The article was received on 30 Dec 2013, accepted on 21 Mar 2014 and first published on 21 Mar 2014

Article type: Paper
DOI: 10.1039/C3DT53649A
Citation: Dalton Trans., 2014,43, 9038-9044
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    Unexpected bond activations promoted by palladium nanoparticles

    A. M. López-Vinasco, I. Favier, C. Pradel, L. Huerta, I. Guerrero-Ríos, E. Teuma, M. Gómez and E. Martin, Dalton Trans., 2014, 43, 9038
    DOI: 10.1039/C3DT53649A

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