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Citation: SHEN Bin, WANG Yong-An, WANG Zhi-Fei, ZHANG Ling. Catalytic Activity of an Oxime Carbapalladacycle Complex Grafted onto Superparamagnetically Mesoporous Nanoparticles for the Heck Reaction[J]. Acta Physico-Chimica Sinica, ;2010, 26(07): 1860-1866. doi: 10.3866/PKU.WHXB20100707 shu

Catalytic Activity of an Oxime Carbapalladacycle Complex Grafted onto Superparamagnetically Mesoporous Nanoparticles for the Heck Reaction

1.
School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China

Received Date: 28 January 2010
Available Online: 18 May 2010

A mesoporous SiO2@Fe3O4 nanocomposite was prepared by the sol-gel method. The nanocomposite was modified with a thiol and then a long carbon chain oxime carbapalladacycle complex as grafted by a—SCH2— linkage. The catalyst was characterized by transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), Fourier transform infrared (FT-IR) spectroscopy, N2 adsorption-desorption isotherms, X-ray photoelectron spectroscopy (XPS), and vibration samplemagnetometry (VSM). Its catalytic activity for the Heck coupling reaction was measured. The BET surface area of the support with a diameter of 150 nm was about 287.0 m2·g-1 and the average pore size was about 3.5 nm. The catalyst had superparamagnetic properties. In the Heck reaction of iodobenzene with ethyl acrylate, a high conversation of 99%was obtained after 2.5 h. The catalyst was reused 6 times without significant loss of activity (95%after the sixth run). The catalyst was easily dispersed in the reaction mixture and was separated swiftly by an added magnetic field.
- Sol-gel method,
- Superparamagnetic,
- Mesoporous,
- Oxime carbapalladacycle,
- Supported catalyst,
- Heck reaction
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