Plasma‐Made (Ni0.5Cu0.5)Fe2O4 Nanoparticles for Alcohol Amination under Microwave Heating,ChemCatChem

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Plasma‐Made (Ni0.5Cu0.5)Fe2O4 Nanoparticles for Alcohol Amination under Microwave Heating
ChemCatChem ( IF 3.8 ) Pub Date : 2019-08-02 , DOI: 10.1002/cctc.201900592
Alain You Li ₁ , Nicolas Dumaresq ₂ , Andréanne Segalla ₁ , Nadi Braidy ₂ , Audrey Moores _{1,

3}

Affiliation

Amine N‐alkylation is a process involved in the production of a wide range of chemicals. Here we describe the synthesis of well‐defined (Ni_0.5Cu_0.5)Fe₂O₄ magnetic nanoparticles by plasma induction, and their successful application to amine N‐alkylation using alcohols as coupling agents through a borrowing hydrogen pathway. Plasma induction allows precise morphology and size control over nanoparticle synthesis, while allowing the one‐pot production of decagram quantities of material. Up to date, such nanoparticles have never been applied for organic reactions. By coupling high‐end characterization techniques with catalytic optimization, we showed that small Cu(0) satellite nanoparticles played an essential role in alcohol oxidation, whereas both Ni and Cu were required for the last step of the reaction. Using elemental mapping, we demonstrated that catalyst deactivation occurred through a leaching/re‐deposition mechanism of Cu and Ni. The reactions were conducted under microwave conditions, which exerted a positive effect on catalytic activity. Finally, the catalyst was active at low metal loadings (2 mol%) even on the gram‐scale, and affording unprecedented TON for this reaction catalyzed by Ni/Cu bimetallic systems (19).

中文翻译：

微波加热下用于乙醇胺化的等离子（Ni0.5Cu0.5）Fe2O4纳米粒子

胺N烷基化是涉及多种化学品生产的过程。在这里，我们描述了通过等离子诱导合成定义明确的（Ni _0.5 Cu _0.5）Fe ₂ O ₄磁性纳米粒子及其在胺N中的成功应用通过借用的氢途径使用醇作为偶联剂进行烷基化。等离子体感应可对纳米颗粒的合成进行精确的形态和尺寸控制，同时允许一锅生产十克数量的材料。迄今为止，此类纳米颗粒从未应用于有机反应。通过将高端表征技术与催化优化相结合，我们显示出小的Cu（0）卫星纳米颗粒在醇氧化中起着至关重要的作用，而反应的最后一步则同时需要Ni和Cu。使用元素映射，我们证明了催化剂失活是通过铜和镍的浸出/再沉积机理而发生的。反应在微波条件下进行，这对催化活性产生了积极的影响。最后，

更新日期：2019-08-02

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