Molybdenum Schiff Base Complex Covalently Anchored to Silica-Coated Cobalt Ferrite Nanoparticles as a Novel Heterogeneous Catalyst for the Oxidation of Alkenes
Molybdenum Schiff Base Complex Covalently Anchored to Silica-Coated Cobalt Ferrite Nanoparticles as a Novel Heterogeneous Catalyst for the Oxidation of Alkenes
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DOI：
10.1007/s10562-012-0770-z
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发表时间：
2012-01
影响因子：
2.8
通讯作者：
M. Kooti;M. Afshari
中科院分区：
文献类型：
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作者：
M. Kooti;M. Afshari
摘要制备了硅包覆钴铁氧体纳米粒子，并用席夫碱对其进行官能化处理，得到了固定化的双齿配体。然后用Mo(O2)2(Acac)2对功能化的磁性纳米粒子进行处理，得到了新型的固载化钼系席夫碱催化剂。用X射线粉末衍射仪、透射电子显微镜、振动样品磁强计、热重分析、傅里叶变换红外光谱和电感耦合等离子体原子发射光谱对催化剂进行了表征。结果表明，以叔丁醇作氧化剂，固载钼络合物是一种高效的多相催化剂，可用于各种烯烃的氧化反应。这种催化剂很容易通过简单的磁力沉淀法回收，可重复使用多次，催化活性不会显著下降。
AbstractSilica-coated cobalt ferrite nanoparticles were prepared and functionalized with Schiff base groups to yield immobilized bidentate ligands. The functionalized magnetic nanoparticles were then treated with Mo (O2)2(acac)2, resulting in the novel immobilized molybdenum Schiff base catalyst. The as-prepared catalyst was characterized by X-ray powder diffraction, transmission electron microscopy, vibrating sample magnetometry, thermogravimetric analysis, Fourier transform infrared, and inductively coupled plasma atomic emission spectroscopy. The immobilized molybdenum complex was shown to be an efficient heterogeneous catalyst for the oxidation of various alkenes usingt-BuOOH as oxidant. This catalyst, which is easily recovered by simple magnetic decantation, could be reused several times without significant degradation in catalytic activity.Graphical Abstract