Abstract A heterogeneous magnetic supported copper(II) nanocatalyst has been obtained through the reaction of 2-hydroxy-1-naphthaldehyde with the functionalized silica coated iron oxide nanoparticle (Fe3O4@SiO2@NH2) to synthesize immobilized Schiff base ligand (Fe3O4@SiO2/Schiff base). This procedure was followed by the addition of Cu(CH3COO)2.H2O to the prepared particles in order to form the copper(II) Schiff base complex on the surface of iron oxide nanoparticles. Versatile techniques such as FT-IR, SEM, XRD, ICP-OES, EDS and VSM were employed to characterize the synthesized Cu nanocatalyst. Furthermore, its catalytic functionality has been investigated for the oxidation of various olefins with the help of hydrogen peroxide (H2O2) as an eco-friendly oxidant. In the next step, the final samples of reactions were isolated quite simply by using magnets and analyzed by GC and GC-MS instruments. The obtained copper(II) nanocatalyst grants some superiorities such as simple magnetic separation from the mixture, short reaction time (2h) and high conversion through green processes exclusively for styrene (conversion: 100%) and norbornene (conversion: 79%).

中文翻译：

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磁性载体上的 Cu(II) Schiff 碱络合物：一种使用 H2O2 作为环保氧化剂氧化烯烃的高效纳米催化剂

摘要 通过 2-羟基-1-萘醛与功能化二氧化硅包覆的氧化铁纳米颗粒 (Fe3O4@SiO2@NH2) 反应合成固定化席夫碱配体 (Fe3O4@SiO2/席夫碱）。在此过程之后，将 Cu(CH3COO)2.H2O 添加到制备的颗粒中，以在氧化铁纳米颗粒的表面形成铜 (II) 席夫碱复合物。采用FT-IR、SEM、XRD、ICP-OES、EDS和VSM等多功能技术对合成的Cu纳米催化剂进行表征。此外，在过氧化氢（H2O2）作为环保氧化剂的帮助下，已经研究了其催化功能对各种烯烃的氧化。在下一步中，使用磁铁非常简单地分离出反应的最终样品，并通过 GC 和 GC-MS 仪器进行分析。获得的铜（II）纳米催化剂具有一些优势，例如从混合物中简单的磁分离，反应时间短（2h）和通过专门用于苯乙烯（转化率：100％）和降冰片烯（转化率：79％）的绿色工艺的高转化率。