【摘要】 以四氧化三铁/聚苯乙烯核壳结构的纳米微球为载体,通过傅克反应在其表面修饰高活性的大位阻N杂环卡宾配体,并利用Suzuki-Miyaura偶联反应考察此催化剂的综合性能.研究结果表明:制备的负载催化剂易于分离,对溴代芳烃表现出极高的催化活性,对低活性的氯代芳烃也有良好的催化效果,且具有良好的可重复使用性.更多还原

【Abstract】 The magnetic nano-beads of Fe3O4/polystyrene with core/shell structure were used as catalyst carriers and its surface was modified with high active ligand of bulky N-heterocyclic carbine via Friedel-Crafts reaction.Suzuki-Miyaura coupling reaction was used to evaluate the catalytic properties of the obtained catalysts.It indicated that the catalyst could be easily separated and showed extremely high activity when brombenzene was employed as starting material.It showed good catalytic activity to the chlorobenzene,and the good reusability was also found for these magnetic catalysts.更多还原