COLL 234 |
| The application of magnetic Fe2O3 nanoparticles as a scaffold for hosting catalysts was investigated. N-Heterocyclic carbene (NHC) moieties were immobilized onto the surface of Fe2O3 nanoparticles through a silane linker. Subsequently, nanoparticles were functionalized by the formation of NHC-Pd complexes. The nanoparticle-supported NHC-Pd catalysts demonstrated high catalytic activity in cross-coupling reactions. The recovery of catalysts was easily achieved by using an external magnet. No significant loss of the catalytic activity of the immobilized catalysts was observed after five rounds of reactions. More importantly, a comparative kinetic study of coupling reactions promoted by palladium catalysts that are supported by insoluble polymer support, nanoparticle support, and non-support proved that the catalytic activity of Fe2O3 nanoparticle-supported NHC-Pd was greatly enhanced. |
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Fundamental Research in Colloid and Surface Chemistry
6:00 PM-8:00 PM, Monday, August 20, 2007 BCEC -- East Registration, Poster
Division of Colloid & Surface Chemistry |