期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 18, 期 11, 页码 3305-3315出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201103147
关键词
catalyst recovery; core-shell magnetic nanoparticles; cross-coupling; dendrimers; magnetic properties; nanoparticles
资金
- Universite Bordeaux 1, Centre National de la Recherche Scientifique (CNRS)
- Region Aquitaine, the Ministere de l'Enseignement Superieur et de la Recherche
- Agence Nationale de la Recherche [ANR-05-JCJC-0245]
The use of dendritic structures for the grafting of coreshell ?-Fe2O3/polymer 300 nm superparamagnetic nanoparticles (MNPs) has been performed with four metallodendrons that were functionalized with diphosphinopalladium complexes. The catalytic performance of these nanocatalysts was optimized for the Suzuki C?C cross-coupling reaction. These results demonstrated the importance of optimizing the catalytic efficiency of grafted MNPs by optimizing the dendritic structures and the nature of the peripheral phosphine ligands. All of these nanocatalysts showed remarkable reactivity towards bromoarenes and they were recovered and efficiently reused by magnetic separation with almost no loss of reactivity, even after 25 cycles.
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