【作者】 温昕； 乔贤亮； 白国义；

【Author】 Xin Wen;Xianliang Qiao;Guoyi Bai;College of Chemistry and Environmental Science, Hebei University;

【机构】 河北大学化学与环境科学学院；

【摘要】 炔（-C≡C-）选择性加氢为相应的烯（-CH=CH-）对于合成许多特殊结构的化合物具有重要意义。虽然研究者已经制备了多种催化剂用于炔的选择性加氢,但其仍存在催化效率低下、催化剂不易分离等问题。磁性分离具有简便、快速、环境友好等特性,因此制备磁性可回收催化剂具有广阔的应用前景。我们将Pd纳米粒子固载于支化聚乙烯亚胺（bPEI）接枝的Fe₃O₄纳米粒子上,在不使用任何催化剂配体情况下,制备了一种磁性可分离的Pd/bPEI@Fe₃O₄纳米催化剂。实验结果表明,该催化剂在二苯乙炔选择性加氢为顺式二苯乙烯的反应中具有较好的催化活性和选择性（Fig.1）,并可通过磁铁方便的回收。更多还原

【Abstract】 The selective semihydrogenation of alkynes to the corresponding alkylene has great significance for the synthesis of many compounds. Although the researchers have prepared diverse catalysts for the semihydrogenation of alkynes, it still exist the problems in catalytic efficiency and easy separation. Magnetic separation provides a quick, simple, eco-friendly, and effective method for the recycling of nanomaterials, so it has great application in the recovery of catalysts. A magnetically separable Pd/bPEI@Fe₃O₄ nanocatalyst was prepared via the in-situ formation of Pd nanoparticles on the branched polyethyleneimine（b PEI） grafted Fe₃O₄ nanoparticles, without using any catalyst ligands. The experimental results show that the catalyst has good catalytic activity and selectivity in the semihydrogenation of diphenylacetylene to trans-diphenylethene, and can be easily recovered by a magnet.更多还原