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

Authors

  • Zhi Zheng,

    1. Zhejiang Province Key Laboratory of Biofuel, The State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014 (P.R. China), Fax: (+86) 571-88320832
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  • Prof. Jianli Wang,

    Corresponding author
    1. Zhejiang Province Key Laboratory of Biofuel, The State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014 (P.R. China), Fax: (+86) 571-88320832
    • Zhejiang Province Key Laboratory of Biofuel, The State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014 (P.R. China), Fax: (+86) 571-88320832

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  • Miao Zhang,

    1. Zhejiang Province Key Laboratory of Biofuel, The State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014 (P.R. China), Fax: (+86) 571-88320832
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  • Lixin Xu,

    1. Zhejiang Province Key Laboratory of Biofuel, The State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014 (P.R. China), Fax: (+86) 571-88320832
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  • Prof. Jianbing Ji

    1. Zhejiang Province Key Laboratory of Biofuel, The State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou, 310014 (P.R. China), Fax: (+86) 571-88320832
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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 Fe3O4 nanoparticles. Moreover, the magnetic response ensures the rapid separation and quantitative recycling of TEMPO/MPNs by simple magnetic decantation.

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