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发展了在非卤素绿色离子液体1-丁基-3-甲基咪唑离子液体乳酸盐中制备纳米Pd催化剂的简便化学方法.透射电镜结果表明,Pd纳米粒子高度分散在[Bmim]Lac离子液体中,平均粒径为2.2–3.1 nm.Pd纳米粒子的大小随着体系中[Bmim]Lac与Pd(OAc)2摩尔比减小和温度升高而增大.考察了离子液体稳定纳米Pd催化剂(PdNPs@[Bmim]Lac)催化Heck-Mizoroki反应性能,并对反应条件进行了优化.结果表明,所制备的离子液体稳定的纳米Pd催化剂在优化条件下可高效催化系列卤代芳烃与烯烃的Heck-Mizoroki反应,且可循环使用6次.
A simple and convenient chemical method was developed for the preparation of nano-Pd catalyst in 1-butyl-3-methylimidazolium ionic liquid lactate, a non-halogen green ionic liquid.The results of TEM showed that Pd nanoparticles were highly dispersed in [Bmim] Lac ionic liquid , The average particle size is 2.2-3.1 nm.The size of Pd nanoparticles increases with the decrease of molar ratio of [Bmim] Lac to Pd (OAc) 2 and the increase of temperature in the system.It is investigated that the ionic liquid stabilized nano-Pd catalyst (PdNPs @ [Bmim] Lac) was used to catalyze the Heck-Mizoroki reaction performance and the reaction conditions were optimized.The results showed that the Pd-P nanosized Pd catalyst could efficiently catalyze the reaction of a series of halogenated aromatics with alkenes under optimized conditions Heck-Mizoroki reaction, and can be recycled 6 times.