Moradi Parisa
Department of Chemistry, Faculty of Science, Ilam University P. O. Box 69315516 Ilam Iran
RSC Adv. 2022 Nov 22;12(52):33459-33468. doi: 10.1039/d2ra04759d.
Magnetic boehmite nanoparticles (FeO@boehmite NPs) were synthesized from a hybrid of boehmite and FeO nanoparticles. At first, boehmite nanoparticles (aluminum oxide hydroxide) were prepared a simple procedure in water using commercially available materials such as sodium hydroxide and aluminum nitrate. Then, these nanoparticles were magnetized using FeO NPs in a basic solution of FeCl·4HO and FeCl·6HO. FeO@boehmite NPs have advantages of both boehmite nanoparticles and FeO magnetic materials. Magnetic boehmite nanoparticles have been characterized by various techniques such as TEM, SEM, EDS, WDX, ICP, FT-IR, Raman, XRD and VSM. SEM and TEM images confirmed that particles size are less than 50 nm in diameter with a cubic orthorhombic structure. Then, FeO@boehmite NPs were applied as a homoselective, highly efficient, cheap, biocompatibility, heterogeneous and magnetically recoverable nanocatalyst in the synthesis of 5-substituted 1-tetrazole derivatives. FeO@boehmite NPs can be recycled for several runs in the synthesis of tetrazoles. Also, all tetrazoles were isolated in high yields, which reveals high activity of FeO@boehmite NPs in the synthesis of tetrazole derivatives. FeO@boehmite NPs shows a good homoselectivity in synthesis of 5-substituted 1-tetrazole derivatives.
磁性勃姆石纳米颗粒（FeO@勃姆石纳米颗粒）由勃姆石和FeO纳米颗粒的混合物合成。首先，使用氢氧化钠和硝酸铝等市售材料通过简单的水相程序制备勃姆石纳米颗粒（氢氧化铝氧化物）。然后，在FeCl₃·4H₂O和FeCl₂·6H₂O的碱性溶液中用FeO纳米颗粒将这些纳米颗粒磁化。FeO@勃姆石纳米颗粒兼具勃姆石纳米颗粒和FeO磁性材料的优点。磁性勃姆石纳米颗粒已通过多种技术进行表征，如透射电子显微镜（TEM）、扫描电子显微镜（SEM）、能谱仪（EDS）、波长色散X射线光谱仪（WDX）、电感耦合等离子体质谱仪（ICP）、傅里叶变换红外光谱仪（FT-IR）、拉曼光谱仪、X射线衍射仪（XRD）和振动样品磁强计（VSM）。扫描电子显微镜和透射电子显微镜图像证实，颗粒直径小于50 nm，具有立方正交结构。然后，FeO@勃姆石纳米颗粒被用作一种均相选择性、高效、廉价、生物相容性好、多相且可磁回收的纳米催化剂，用于合成5-取代的1-四唑衍生物。FeO@勃姆石纳米颗粒在四唑合成中可循环使用多次。此外，所有四唑均以高产率分离得到，这表明FeO@勃姆石纳米颗粒在四唑衍生物合成中具有高活性。FeO@勃姆石纳米颗粒在5-取代的1-四唑衍生物合成中表现出良好的均相选择性。
