Magnetic Polystyrene Nanosphere Immobilized TEMPO: A Readily Prepared, Highly Reactive and Recyclable Polymer Catalyst in the Selective Oxidation of Alcohols

作者：Zhi Zheng, Jianli Wang, Miao Zhang, Lixin Xu, Jianbing Ji · 发表于：ChemCatChem · 年份：2012 · DOI：10.1002/cctc.201200459 · 被引用次数：53 · 研究领域：Oxidative Organic Chemistry Reactions、Chemical Synthesis and Reactions、Mesoporous Materials and Catalysis

Abstract 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 Fe 3 O 4 nanoparticles. Moreover, the magnetic response ensures the rapid separation and quantitative recycling of TEMPO/MPNs by simple magnetic decantation.