Magnetic Polystyrene Nanosphere Immobilized TEMPO: A Readily Prepared, Highly Reactive and Recyclable Polymer Catalyst in the Selective Oxidation of Alcohols
writer：Zheng, Z (Zheng, Zhi)[ 1 ] ; Wang, JL (Wang, Jianli)[ *] ; Zhang, M (Zhang, Miao)[ 1 ] ; Xu, LX
keywords：alcohols,heterogeneous catalysis,magnetic properties,nanostructures,oxidation
source：期刊
specific source：CHEMCATCHEM
Issue time：2013年
摘要: The 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) radical immobilized on the magnetic polystyrene nanospheres (MPNs) was used as a recyclable catalyst in the oxidation of various alcohols. The new and simply prepared heterogeneous TEMPO/MPNs exhibits both similar versatility and efficiency to homogeneous TEMPO under basic Montanari conditions. The excellent stability of the MPNs enables the TEMPO/MPNs to be recycled more than 20 times without significant leaching of immobilized TEMPO radicals or degradation of Fe3O4 nanoparticles. Moreover, the magnetic response ensures the rapid separation and quantitative recycling of TEMPO/MPNs by simple magnetic decantation.