Dendrimer-Encapsulated Pd Nanoparticles as Aqueous, Room-Temperature Catalysts for the Stille Reaction

Garcı́a-Martı́nez, Joaquín C.; Lezutekong, Raphael; Crooks, Richard M.

doi:10.1021/ja042479r

Cited by 259 publications

(224 citation statements)

References 37 publications

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“…8,9 Suzuki cross-coupling reactions are one of the most widely implemented methods used in the formation of carbon-carbon bonds, and are also very efficient under heterogeneous catalysis conditions. 10,11 It is well established that the nanocrystal morphology, which is related to the type of exposed crystal plane and atomic arrangement on the surface of the nanocrystal, influences the catalytic activity and selectivity.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and catalytic properties of highly branched palladium nanostructures using seeded growth

et al. 2016

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Access to the full text of the published version may require a subscription. In order to develop nanocatalysts with enhanced catalytic performance, it is important to be able to synthesize nanocrystals enclosed by high-index surface facets, due to their high denisty of low coordinated atoms at step, ledge and kink sites. Here, we report a facile seed-mediated route to the synthesis of highly branched Pd nanostructures with a combination of {113}, {115} and {220} high-index surface planes. The size of these nanostructures is readily controlled by a simple manipulation of the seed concentration. The selective use of oleylamine and oleic acid was also found to be critical to the synthesis of these structures, with Pd icosahedra enclosed by low-index {111} facets being produced when hexadecylamine was employed as capping ligand. The structure-property relationship of these nanostructures as catalysts in Suzuki-cross coupling reactions was then investigated and compared, with the high-index faceted branched Pd nanostructures found to be the most effective catalysts. Rights

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Section: Introductionmentioning

confidence: 99%

Synthesis and catalytic properties of highly branched palladium nanostructures using seeded growth

et al. 2016

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“…Progress in the field has been rapid with a multitude of reactions now known to be catalysed by nanoparticles stabilised by a variety of surfactants [5], thiols [6], polymers (PVP, etc) [7][8][9] and dendrimers [10][11][12][13]. Interestingly, Pd nanoparticles prepared by different methods and using different stabilising ligands, e.g.…”

Section: Introductionmentioning

confidence: 99%

Suzuki coupling activity of an aqueous phase Pd nanoparticle dispersion and a carbon nanotube/Pd nanoparticle composite

Sullivan¹,

Flanagan²,

Hain

2009

Catalysis Today

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An aqueous phase dispersion of Pd nanoparticles stabilised by 4-Dimethylaminopyridine (DMAP) promotes model Suzuki coupling reactions. The dispersion contains Pd nanoparticles of 3.4 0.5 nm and a Pd(II) species (Pd(DMAP) 4 (OH) 2 ) which forms following aerobic oxidation of the nanoparticles.The activity of the nanoparticle dispersion in promoting the Suzuki reactions is directly proportional to the size of the halogen on the substrate (as is usual for these coupling reactions) and also to the age of the nanoparticle dispersion.The Pd(DMAP) 4 (OH) 2 complex can be isolated from the dispersion and is found to be very active in promoting the reactions. Its formation following aerobic oxidation of the nanoparticles is proposed as the reason for the improved activity of the dispersion with age.The nanoparticles present in the dispersion can, through displacement of the stabilising ligand, be immobilised onto functionalised Multi Wall Carbon Nanotubes (MWCNT) and the composite formed is an active and recyclable catalyst. This MWCNT/Pd-DMAP NP composite acts as a reservoir of dissolved Pd species, which function as homogeneous catalysts under reaction conditions.

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“…28,31,47,48 These macromolecules lead to nearly monodispersed particles. Surfactants are generally used as stabilizers of aqueous NP suspensions of transition metals reduced by NaBH 4 or KBH 4 .…”

Section: Synthesis Of Metal Nanoparticlesmentioning

confidence: 99%

Hydrogen (H2) sensing and catalysis with organic-stabilized Pd and Pd alloy nanoparticles.

Moreno¹

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Dendrimer-Encapsulated Pd Nanoparticles as Aqueous, Room-Temperature Catalysts for the Stille Reaction

Cited by 259 publications

References 37 publications

Synthesis and catalytic properties of highly branched palladium nanostructures using seeded growth

Synthesis and catalytic properties of highly branched palladium nanostructures using seeded growth

Suzuki coupling activity of an aqueous phase Pd nanoparticle dispersion and a carbon nanotube/Pd nanoparticle composite

Hydrogen (H2) sensing and catalysis with organic-stabilized Pd and Pd alloy nanoparticles.

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