十二烷基磺酸根插层水滑石负载纳米钯催化的Suzuki偶联反应(英文)  

Dodecylsulfate Anion Embedded Layered Double Hydroxide Supported Nanopalladium Catalyst for the Suzuki Reaction

作　　者：刘诗咏[1] 周其忠[1] 金正能[1] 蒋华江[1] 姜玄珍[2] 

机构地区：[1]台州学院医药化工学院,浙江临海317000 [2]浙江大学化学系,浙江杭州310027

出　　处：《催化学报》2010年第5期557-561,共5页

基　　金：Supported by the National Natural Science Foundation of China(20476092);the Foundation of Taizhou University(09ZD12)

摘　　要：首次制备了十二烷基硫酸根(DS–)插层水滑石负载的纳米钯无膦配体型的Suzuki偶联反应催化剂.DS–进入到水滑石层间,使层间距从微孔增至2.9nm,从而有利于中等尺度的有机分子在催化剂表面的扩散.进一步以PdCl42–交换该水滑石得到DS–和PdCl42–双插层的水滑石.还原后可得到层间插有金属钯纳米团簇的水滑石.由于DS–插层后在水滑石层板间形成的空间有限,限制了Pd0团簇的进一步生长.作为一种亲油性的非均相催化剂,该类催化剂可有效促进卤代芳烃与苯硼酸的Suzuki偶联反应.催化剂循环使用5次后活性基本得以保持.The dodecylsulfate anion（DS-） embedded layered double hydroxide（LDH） supported nanopalladium catalyst（LDH-DS-Pd0） is a novel phosphine free recyclable heterogeneous catalytic system for palladium catalyzed Suzuki coupling reactions and has been prepared for the first time.The intercalation of DS-changed the interlayer spacing of LDH from a microsize to a mesosize（2.9 nm） range,which favors the diffusion of average sized organic molecules.The Pd0 clusters obtained from the reduction of PdCl42--interlayered LDH were intercalated between the LDH layers and hence the growth of Pd0 clusters was effectively hindered by the limited space created by the intercalation of DS-.This lipophilic catalyst was highly efficient in promoting the Suzuki reaction of aryl halides with phenylboronic acid.As a heterogeneous nanocatalyst,LDH-DS-Pd0 could be reused five times without significant loss of catalytic activity.

关 键 词：表面活性剂 水滑石 纳米钯 介孔材料 SUZUKI偶联反应 卤代芳烃 苯硼酸 

分 类 号：O643.32[理学—物理化学]