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首页> 外文期刊>RSC Advances >Ethylenediamine-functionalized magnetic Fe3O4@SiO2 nanoparticles: cooperative trifunctional catalysis for selective synthesis of nitroalkenes
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Ethylenediamine-functionalized magnetic Fe3O4@SiO2 nanoparticles: cooperative trifunctional catalysis for selective synthesis of nitroalkenes

机译：乙二胺官能化的磁性Fe3O4 @ SiO2纳米颗粒：协同三官能催化选择性合成硝基烯烃

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摘要

A magnetically separable trifunctional nanocatalyst Fe3O4@SiO2-NH2 was synthesized and characterized by TEM, FT-IR, XRD, TGA, and EA. The designed nanocatalyst was found to be highly active for selective synthesis of nitroalkenes with nitromethane and aromatic aldehyde through cooperative trifunctional catalysis of primary amine, secondary amine and Si-OH groups on the surface of the catalyst. Under the optimized conditions, various representative substrates were extended to obtain the corresponding products in moderate or excellent yields. After the reaction, the trifunctional nanocatalyst was easily recovered and recycled by applying an external magnet. In addition, a possible cooperative trifunctional catalysis mechanism was also proposed.
机译：合成了磁性可分离的三官能纳米催化剂Fe3O4 @ SiO2-NH2，并通过TEM，FT-IR，XRD，TGA和EA对其进行了表征。发现所设计的纳米催化剂对于通过催化表面上的伯胺，仲胺和Si-OH基团的协同三官能催化，与硝基甲烷和芳族醛选择性合成硝基烯烃具有很高的活性。在优化的条件下，各种代表性的底物得到了扩展，以中等或极好的产量获得了相应的产品。反应后，通过施加外部磁体容易地回收和再循环三官能纳米催化剂。此外，还提出了可能的协同三功能催化机理。

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