Immobilized Cu complex on modified Fe3O4 nanoparticles as a magnetically separable catalyst for the oxidative homocoupling of terminal alkynes
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- 作者：Faezeh Farzaneh ; Zahra Shafie…
- 关键词：Magnetic nanoparticles ; Oxidative homocoupling ; Terminal alkynes ; Immobilization ; Cu complex
- 刊名：Reaction Kinetics, Mechanisms and Catalysis
- 出版年：2013
- 出版时间：October 2013
- 年：2013
- 卷：110
- 期：1
- 页码：119-129
- 全文大小：416KB
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Zahra Shafie (1)
Elnaz Rashtizadeh (1)
Mehdi Ghandi (2)
1. Department of Chemistry, University of Alzahra, P.O. Box 1993891176, Vanak, Tehran, Iran
2. School of Chemistry, College of Science, University of Tehran, Tehran, Iran - ISSN：1878-5204
文摘
Fe3O4 nanoparticles were prepared by the co-precipitation method, and silica was then coated on the magnetic nanoparticles followed by modification with (3-aminopropyl)trimethoxysilane (APTMS) and complexation with CuI, Cu(bpy)2I and Cu(en)2I and designated as Fe3O4@SiO2@APTMS@Cu Complex. The prepared catalysts were characterized by FTIR, XRD, SEM, and VSCM techniques. It was found that Fe3O4@APTMS@Cu(en)2 successfully mediates the oxidative homocoupling of phenylacetylene, 4-tert-butylphenylacetylene, 1-ethynyl-4-fluorobenzene and pent-1-yn-3-ol with 67-00?% conversion and 95-00?% selectivity. The prepared Fe3O4@APTMS@Cu(en)2 nanoparticles were magnetically recovered and recycled without significant decrease in activity.