NDLI: Magnetic Fe<sub>3</sub>O<sub>4</sub> nanoparticles supporting Macmillan with controlled shell structure as an efficient and reusable catalyst for asymmetric reaction

Content Provider	Royal Society of Chemistry (RSC)
Author	Zhang, Suli Yang, Beilei Lv, Chunna Li, Xinjuan Jia, Xianbin Hu, Zhiguo
Copyright Year	2016
Abstract	Magnetic nanoparticles grafted with chiral polymer brushes offer an effective way to bridge the gap between heterogeneous and homogeneous catalysis. Herein, we synthesized a series of chiral catalysts immobilized on magnetic Fe3O4 nanoparticles (MNPs) with a controlled shell structure by an efficient method. This involves the synthesis of “living” Fe3O4 nanoparticles with surface-bound vinyl groups and their subsequent grafting with chiral polymer brushes by the simple RAFT coupling reaction (i.e., chiral polymers with a dithioester end group couple with vinyl groups on the MNPs in the presence of a free radical initiator). The well-defined characteristics of the resulting MNPs allowed the first systematic study of the effects of various structural parameters (the chiral polymer molecular weight and grafting density) on their catalytic performance, which is of great importance for rationally designing more advanced chiral catalyst loading. In particular, the resulting Fe3O4-supported catalysts can effectively catalyze the asymmetric Diels–Alder reaction and can be recycled five times by simple magnetic separation while maintaining activity and selectivity.
Starting Page	86531
Ending Page	86539
Page Count	9
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	6
Issue Number	89
Journal	RSC Advances
DOI	10.1039/c6ra11497k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Radical initiator Thin-shell structure Chirality Homogeneous catalysis Magnetic nanoparticles Polymer Grafting Coupling reaction Diels\u2013Alder reaction
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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