Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (03): 217-221. Previous Articles     Next Articles

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  1. (1华东理工大学化学与分子工程学院 上海 200237)
    (2上海师范大学化学系 上海 200234)
  • 收稿日期:2009-06-04 修回日期:2009-07-26 出版日期:2010-02-14 发布日期:2010-02-20
  • 通讯作者: 李和兴
  • 基金资助:


Ethyl-bridged Periodic Mesoporous Organosilica Supported Pd(II) Organometallic Catalyst for Water-medium Barbier Reaction

Yang Xushi1 Huang Jianlin2 Zhu Fengxia2 Li Hexing*,1,2   

  1. (1 School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237)
    (2 Department of Chemistry, Shanghai Normal University, Shanghai 200234)
  • Received:2009-06-04 Revised:2009-07-26 Online:2010-02-14 Published:2010-02-20
  • Contact: HeXing Li

Ordered mesoporous organometallic catalyst Pd(II)-PPh2-PMO(Et) was synthesized by coordinating the Pd(II) with PPh2-ligand originally incorporated into the ethyl-bridged periodic mesoporous organosilica via surfactant-directed co-condensation. This catalyst exhibited matchable activity with the corresponding PdCl2(PPh3)2 homogeneous catalyst in water-medium Barbier reaction. On one hand, it could be attributed to the large surface area and ordered mesporous channels of the PMO support, leading to the high dispersion of Pd(II) active sites and the reduced diffusion limit. Meanwhile, the ethyl fragments embedded in the pore walls could enhance surface hydrophobility, which further promoted the diffusion and adsorption of organic molecules, leading to the enhanced activity. Besides, the Pd(II)-PPh2-PMO(Et) could be used repetitively, showing a good potential in industrial applications.

Key words: periodic mesoporous organosilica, Pd(PPh3)2Cl2, immobilized homogeneous catalyst, Barbier reaction, water-medium clean organic reaction