催化学报 ›› 2017, Vol. 38 ›› Issue (8): 1413-1422.

• 论文 • 上一篇    下一篇

可重复使用的新型催化剂的合成、表征及在绿色条件下催化Suzuki和Heck反应:锚合在磁性纳米多孔的MCM-41上Pd(0)希夫碱络合物

Mohsen Nikoorazma, Farshid Ghorbanib, Arash Ghorbani-Choghamarania, Zahra Erfania   

  1. a 伊拉姆大学科学学院化学系, 伊拉姆, 伊朗;
    b 库尔德斯坦大学自然资源学院环境系, 萨南达杰 66177-15177, 伊朗
  • 收稿日期:2017-04-07 修回日期:2017-05-16 出版日期:2017-08-18 发布日期:2017-08-04
  • 通讯作者: Mohsen Nikoorazm

Synthesis and characterization of a Pd (0) Schiff base complex anchored on magnetic nanoporous MCM-41 as a novel and recyclable catalyst for the Suzuki and Heck reactions under green conditions

Mohsen Nikoorazma, Farshid Ghorbanib, Arash Ghorbani-Choghamarania, Zahra Erfania   

  1. a Department of Chemistry, Faculty of Science, Ilam University, P. O. Box 69315516, Ilam, Iran;
    b Department of Environment, Faculty of Natural Resource, University of Kurdistan, Sanandaj 66177-15177, Iran
  • Received:2017-04-07 Revised:2017-05-16 Online:2017-08-18 Published:2017-08-04

摘要:

将Pd希夫碱络合物固定在磁性的MCM-41表面上,做为环境友好且可循环使用的新型多相纳米催化剂,并采用红外光谱、振动探针式磁强计、能量散射谱、透射电镜、扫描电镜、热重、电感耦合等离子体发射光谱和X-射线衍射等对其进行了全面的表征.然后将该催化剂用于以PEG为绿色溶剂的一步法Suzuki和Heck合成反应中,均以较高收率得到目标产物.该法主要优点为反应时间短、反应条件绿色友好、操作简便、无需使用有毒的有机溶剂、催化剂使用量低,且底物适用性广.更为重要的是,通过外部磁场即可方便地将催化剂从反应混合物中分离出来,可重复使用数次而活性和稳定性未见明显下降.

关键词: MCM-41, 磁性纳米颗粒, Suzuki反应, Heck反应, 聚乙二醇,

Abstract:

A Pd Schiff base complex was immobilized onto the surface of magnetic MCM-41 (Fe3O4@MCM-41@Pd(0)-P2C) as a novel, eco-friendly, and recyclable heterogeneous nanocatalyst and fully characterized by FT-IR, VSM, EDS, transmission electron microscopy, scanning electron microscopy, thermogravimetric analyses, ICP-OES, and X-ray powder diffraction analysis. The Fe3O4@MCM-41@Pd(0)-P2C was investigated as a catalyst for the one-pot Suzuki and Heck reactions in PEG as a green solvent to provide the target products in excellent yields. The main advantages of using this catalyst include a short reaction time, green reaction conditions, a simple experimental procedure, non-use of hazardous organic solvents, low loading of the catalyst, and the ability to use various substrates. More importantly, the catalyst could be easily separated from the reaction mixture with the assistance of an external magnet and could be recovered and reused several times without significant loss of stability and activity.

Key words: MCM-41, Magnetic nanoparticles, Suzuki reaction, Heck reaction, Polyethylene glycol (PEG), Palladium