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- W2949274718 abstract "Received: August 28, 2007; Revised: December 4, 2007; Published online: February 8, 2008Abstract:We report on a systematic study of the useof palladium nanoparticlesimmobilized on sphericalpolyelectrolyte brushes – Pd@SPB – for Heck- andSuzuki-type coupling reactions. The spherical poly-electrolyte brush particles serving as carriers for thepalladium nanoparticles consist of a solid polystyrenecore with a radiusof 46nm onto which long chainsof cationic polyelectrolytesare grafted. The palladi-um nanoparticleshave directly been generatedwithin this brush layer and the stabilization of thenanoparticlesiseffected by the colloidal carriers, nofurther surface stabilization is necessary. We demon-strate that these composite particles present robustcatalysts for the Heck- and Suzuki-type coupling re-actions. This was shown by carrying out the Suzuki-and Heck-type coupling reactionsat relatively lowtemperatures(Suzuki reaction: 508C, Heck reaction:708C). We demonstrate that the catalytic compositeparticlesare not changed by these reaction condi-tionsand retain their full activity for at least fourruns. The yields obtained for both reactions are goodto excellent. The mild operation conditionsof thepalladium nanoparticlesare traced back to the ab-sence of surface stabilization. Further mechanisticimplications are discussed.Keywords:catalysis; Heck-type cross-coupling; palla-dium nanoparticles; spherical polyelectrolyte brush;Suzuki-type cross-coupling" @default.
- W2949274718 created "2019-06-27" @default.
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- W2949274718 date "2008-07-01" @default.
- W2949274718 modified "2023-09-23" @default.
- W2949274718 title "ChemInform Abstract: Suzuki- and Heck-Type Cross-Coupling with Palladium Nanoparticles Immobilized on Spherical Polyelectrolyte Brushes." @default.
- W2949274718 cites W2137029082 @default.
- W2949274718 doi "https://doi.org/10.1002/chin.200827054" @default.
- W2949274718 hasPublicationYear "2008" @default.
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