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以聚丙烯腈纤维为基体,制备了偕胺肟纤维-钯(Ⅱ)配合物,采用FTIR、XPS等物理化学手段对其结构进行了表征.本文研究考察了该配合物在不同反应条件下对碘苯与苯乙烯的Heck反应的催化性能,结果显示:偕胺肟纤维-钯(Ⅱ)配合物在较温和的条件下即可很好的催化Heck反应,经重复使用8次后,1,2-二苯乙烯的产率仍达80%以上,并且反应结束后催化剂易于从反应体系中分离.对于其它不同底物之间的Heck反应,偕胺肟纤维-钯(Ⅱ)配合物同样显示较好的催化性能.
The polyamid fiber was used as the matrix to prepare the amidoxime fiber-palladium (Ⅱ) complex, and its structure was characterized by FTIR, XPS and other physicochemical methods.In this paper, we investigated the effect of the complex under different reaction conditions The catalytic performance of Heck reaction between iodobenzene and styrene showed that the amidoxime fiber-palladium (Ⅱ) complex could catalyze Heck reaction under mild conditions. After repeated use for 8 times, The yield of 2-stilbene was still above 80% and the catalyst was easily separated from the reaction system after the reaction was completed.As for the Heck reaction between other substrates, the amidoxime fiber-palladium (II) complex also showed Better catalytic performance.