中文摘要：

以碱性阴离子交换树脂Amberlite IRA-900为载体,Pd(C3H5)(C5H5)为金属有机前体,采用金属有机气相沉积法在室温下制备了Pd@IRA-900多相催化材料.紫外-可见光谱分析证明前体和树脂骨架之间的化学作用以及树脂本身的孔道结构使得Pd纳米粒子均匀分散在载体上.透射电镜结果显示钯纳米粒子的平均尺寸为2.6 nm.在较温和的条件下Pd@IRA-900对多种卤代芳烃和苯硼酸的Suzuki偶联都具有良好的催化活性,并且催化剂重复使用5次之后依然具有很好的活性.此外,对树脂载体进行碱性交换处理后可得到一种双功能催化材料Pd@IRA-900(OH),该催化剂在不加入碱的条件下也可以催化碘苯和苯硼酸的Suzuki偶联反应.

英文摘要：

A basic anion exchange resin, Amberlite IRA‐900, was loaded with Pd(C3H5)(C5H5) by an easy metal‐organic chemical vapor deposition(MOCVD) approach to give Pd@IRA‐900 catalyst after reduction at room temperature. Ultraviolet‐Visible spectroscopy results showed a red shift of the absorption peak of Pd2+ after the Pd precursor was loaded on the resin, indicating that a chemical reaction occurred between the precursor and the support. Pd nanoparticles with 2.6 nm of average size were well dispersed on the support. The Pd@IRA‐900 catalyst showed high activity for different kinds of aryl halides in Suzuki‐Miyaura coupling reactions under mild and aerobic conditions. Excellent recyclability of Pd@IRA‐900 catalyst was also observed in the Suzuki‐Miyaura coupling reaction of iodobenzene and phenylboronic acid. A bifunctional catalyst Pd@IRA‐900(OH) was synthesized by pretreating the ion exchange resin support with NaOH before Pd loading, which successfully catalyzed the Suzuki‐Miyaura reaction of iodobenzene and phenylboronic acid without base under aerobic conditions.