中文摘要：

发展了一种超顺磁性Fe3O4纳米粒子负载Pd0的简易方法.利用Fe3O4溶胶带正电荷的特性,将负离子PdCl42-通过静电作用吸附在Fe3O4胶体粒子表面（PdCl24-/Fe3O4）,以抗坏血酸（Vc）进一步还原即得到载有金属Pd团簇的Fe3O4胶体粒子（Pd0/Fe3O4）.该磁性载体负载的Pd催化剂对Suzuki反应表现出良好的催化活性,且在反应后,可方便地通过永久磁铁将催化剂从反应体系中分离出来,进行循环使用.试验表明,该催化剂在循环使用五次后反应活性无明显下降.进一步试验发现,这种磁性纳米粒子负载的金属钯对一系列卤代芳烃的Suzuki偶联反应均表现出较优的催化活性.

英文摘要：

A facile way to combine Pd^0 with superparamagnetic Fe3O4 nanoparticles （NP） was provided, in which PdCl4^2- was immobilized directly on the cationic Fe3O4 colloids through electrostatic interaction （ PdCl4^2-/Fe3O4）. Further reduction of the PdCl4^2-/Fe3O4 NP by vitamin C resulted in Pd^0/Fe3O4 NP. These magnetic NP-supported Pd^0 clusters showed high efficiency toward Suzuki reactions. After reactions, the Pd^0/Fe3O4 NP could be facilely recycled by permanent magnet. This catalyst could be reused for 5 times without significant loss in catalytic activity. Suzuki coupling reaction of a variety of aryl halides was also catalyzed efficiently by this magnetic NP supported Pd^0.