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采用浸渍-还原的方法制备负载型催化剂—Pd/MgO,通过电感耦合等离子体发射光谱分析(ICP-AES)、X射线衍射分析(XRD)等手段对催化剂的结构、组成以及Pd含量进行了表征。分别考察溶剂、碱、反应温度及时间等条件对所制备的Pd/MgO催化剂催化Suzuki偶联反应收率的影响,筛选出最适宜的反应条件。实验结果表明:在对溴苯乙酮与苯硼酸的比例为1∶1.5,2mmol碳酸钾,甲醇与水的比例为10∶2,加入钯含量为7.28×10~(-3)mmol的催化剂,60℃下反应1h,Suzuki反应收率可达98%以上。
The supported catalyst-Pd / MgO was prepared by impregnation-reduction method. The structure, composition and Pd content of the catalyst were characterized by inductively coupled plasma atomic emission spectrometry (ICP-AES) and X-ray diffraction analysis . The effects of solvent, alkali, reaction temperature and time on the catalytic yield of Pd / MgO catalyst for Suzuki coupling reaction were investigated respectively, and the most suitable reaction conditions were screened out. The experimental results show that when the ratio of p - bromoacetophenone to phenylboronic acid is 1: 1.5, 2mmol potassium carbonate, the ratio of methanol to water is 10: 2, the catalyst containing 7.28 × 10 ~ (-3) 60 ℃ for 1h, the yield of Suzuki reaction can reach more than 98%.