Stevens Philip D, Fan Jinda, Gardimalla Hari M R, Yen Max, Gao Yong
Department of Chemistry and Biochemistry, Mailcode 4409, Southern Illinois University, Carbondale, Illinois 62901-4409, USA.
Org Lett. 2005 May 26;7(11):2085-8. doi: 10.1021/ol050218w.
Emulsion polymerization was examined as a novel route for the synthesis of core/shell superparamagnetic nanoparticles consisting of a highly crystalline gamma-Fe2O3 core and a very thin polymeric shell wall. These nanoparticles were used as soluble supports for immobilizing Pd catalysts to promote Suzuki cross-coupling reactions. Recovery of catalysts was facilely achieved by applying a permanent magnet externally. Isolated catalysts were reused for new rounds of reactions without significant loss of their catalytic activity.
乳液聚合被视为一种合成核壳型超顺磁性纳米粒子的新途径，该纳米粒子由高度结晶的γ-Fe2O3核和非常薄的聚合物壳壁组成。这些纳米粒子用作固定钯催化剂以促进铃木交叉偶联反应的可溶性载体。通过外部施加永久磁铁可轻松实现催化剂的回收。分离出的催化剂可重复用于新一轮反应，而其催化活性不会有明显损失。
