氮配位的磁性高分子复合微球P(GMA-MMA-AA)/Fe_3O_4负载钯催化水相Suzuki反应的研究  

Catalytic Property of Nitrogen-donor Palladium Complex Supported by P(GMA-MMA-AA)/Fe_3O_4 in Suzuki Coupling Reaction in Aqeous Media

作　　者：袁定重[1,2] 陈碧波[2] 邓慧宇[2] 黄斌[2] 

机构地区：[1]东华理工大学核资源与环境省部共建国家重点实验室培育基地,江西南昌330013 [2]东华理工大学材料工程系,江西南昌330013

出　　处：《东华理工大学学报（自然科学版）》2013年第4期394-399,共6页Journal of East China University of Technology(Natural Science)

基　　金：江西省自然基金项目(No.20114BAB213011);江西省教育厅项目(GJJ13447);东华理工大学博士科研启动基金(No.DHBK1010)

摘　　要：以可控自由基聚合技术制备的磁性高分子复合微球P(GMA-MMA-AA)/Fe3O4为载体,三乙烯四胺为配体制备了一种新型的负载型钯催化剂。采用透射电镜、振动样品磁强计、X射线光电子能谱仪和X射线衍射分析仪等手段对催化剂进行了表征,并评价了催化剂对水相Suzuki反应的催化活性。结果表明,催化剂的平均粒径为800 nm左右,钯在载体表面呈高度分散状态,整个催化剂呈超顺磁性。该催化剂在空气氛围中就能较好的催化水相中芳基卤代物与苯硼酸的Suzuki反应,较高产率且立体选择性地生成取代的联苯产物,反应过程中催化剂可稳定分散于反应体系中,并可在外磁场作用下快速与从体系分离。催化剂重复使用5次后,仍具有较高的活性。Triethylene tetramine modified P （GMA-MMA-AA） / Fe304 composite microspheres prepared by con trolled radical polymerization method are used as a support for the palladium nanopartiele catalyst. The supported catalyst is characterized by transmission electron microscopy （TEM） , X-ray diffraction （XRD）, X-ray Photoelec- tron Spectroscopy （XPS） and a vibration sample magnetometer （VSM）. Its catalytic activity for the Suzuki cou- pling reaction in aqueous meida is measured. The results show that the mean catalyst particle size is 800 nm, pal- ladium is highly dispersed on the surface of the support. The supported palladium compound is an efficient catalyst for Suzuki reaction of aryl halides with phenylboronic to substituted trans-einnamic acid or trans-stilbene at atmos- pheric condition, and the catalyst could be steadily dispersed in the reaction mixture and be separated by the mag- netic field added. The supported catalyst still remains high activity after repeatedly five times.

关 键 词：水介质 SUZUKI反应 负载钯催化剂 磁性高分子复合微球 

分 类 号：TQ426.65[化学工程]