笼状PAMAM模板纳米钯催化Suzuki反应  

Suzuki Coupling Reaction Catalyzed by Pd Nanoparticles Encapsulated in Modified PAMAM

作　　者：王宗廷 孟晨亚 裴晓文 梁祺 

机构地区：[1]中国石油大学(华东)理学院,山东青岛266555

出　　处：《纳米科技》2012年第5期35-40,共6页

摘　　要：针对PAMAM模板纳米钯催化剂在循环使用中容易团聚产生钯黑的问题，文章利用4．5代PAMAM端基的酯基团与乙二胺反应形成鸟笼状大分子，以其为模版合成纳米钯催化剂，研究发现，当端基连接50％，反应条件温和，催化剂易于分离，循环使用4次，仍能保持70％的收率。To resolve the palladium black caused by the agglomerate of Pd nanoparticles encapsulated in Modified PAMAM during the recycling, Several birdeage-like dendrimers of PAMAM were synthesized with the end groups of the 4.5 generation PAMAM and ethylenediamine, and the birdcage-like dendrimers were used as template to fabricate nano-palladium catalyst. The experimental results indicates that the cage-like catalysts connected 50% end groups exhibit mild reaction property, as well as easy separation of product. Compared with that of PAMAM, the cage-like catalysts have recovery yields more that 70% after at four recycles.

关 键 词：钯纳米簇催化剂 笼状聚酰胺-胺树状大分子 SUZUKI反应 钯黑 再利用 

分 类 号：O643.32[理学—物理化学]