Chemical Research in Chinese Universities ›› 2018, Vol. 34 ›› Issue (4): 655-660.doi: 10.1007/s40242-018-7361-5

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Assembly and Post-modification of Fe3O4@MIL-100(Fe) for Knoevenagel Condensation

ZHANG Yanmei, ZHANG Fan, ZHANG Xiang, XU Yingmei, QI Xiaohui, QUAN Chunshan   

  1. Key Laboratory of Biotechnology and Bioresources Utilization, Ministry of Education, College of Life Science, Dalian Minzu University, Dalian 116600, P. R. China
  • Received:2017-11-13 Online:2018-08-01 Published:2018-04-28
  • Contact: ZHANG Yanmei, QUAN Chunshan E-mail:ymzhang@dlnu.edu.cn;mikyeken@dlnu.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21203017), the Open Fund of State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences(No.N-11-3), the Program for Liaoning Excellent Talents in University, China(No.LNET-LJQ2014140) and the Fundamental Research Funds for the Central Universities, China (No.wd01201).

Abstract: Many efforts have been devoted to the integration of magnetic nanoparticles and metal organic frameworks, which makes it easy and simple to separate the nano-sized metal organic frameworks from liquid phase. Amino-functionalized magnetic metal organic frameworks[Fe3O4@MIL-100(Fe)-NH2]were prepared by a stepwise assembly method followed by post-modification with electron-rich reagent. This magnetic catalyst was characterized by means of X-ray diffraction(XRD), transmission electron microscopy(TEM), scanning electron microscopy(SEM) and nitrogen adsorption, and tested in Knoevenagel condensation as a base catalyst. The magnetic catalyst exhibits a core-shell structure and can afford a high activity for the Knoevenagel condensation due to its bifunctional property and reduced diffusion limitation. Furthermore, it could be recovered magnetically and recycled three times. Although activity loss was observed in the recycle experiments, it could be reactivated by dispersing in a fresh modifier solution.

Key words: Fe3O4, MIL-100(Fe), Heterogeneous catalyst, Knoevenagel condensation, Magnetic separation