Dindarloo Inaloo Iman, Majnooni Sahar, Eslahi Hassan, Esmaeilpour Mohsen
Chemistry Department, College of Sciences, Shiraz University, Shiraz 71946 84795, Iran.
Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran.
ACS Omega. 2020 Mar 27;5(13):7406-7417. doi: 10.1021/acsomega.9b04450. eCollection 2020 Apr 7.
A highly efficient and air-, thermal-, and moisture-stable nickel-based catalyst with excellent magnetic properties supported on silica-coated magnetic FeO nanoparticles was successfully synthesized. It was well characterized by Fourier transform infrared spectroscopy, powder X-ray diffraction, transmission electron microscopy, field emission scanning electron microscopy, thermogravimetric analysis, dynamic light scattering (DLS), X-ray photoelectron spectroscopy, vibration sample magnetometry, energy-dispersive X-ray analysis, inductively coupled plasma analysis, and nitrogen adsorption-desorption isotherm analysis. The Suzuki-Miyaura coupling reaction between aryl carbamates and/or sulfamates with arylboronic acids was selected to demonstrate the catalytic activity and efficiency of the as-prepared magnetic nanocatalyst. Using the mentioned heterogeneous nanocatalyst in such reactions generated corresponding products in good to excellent yields in which the catalyst could easily be recovered from the reaction mixture with an external magnetic field to reuse directly for the next several cycles without significant loss of its activity.
成功合成了一种负载在二氧化硅包覆的磁性FeO纳米颗粒上的高效、具有空气、热和湿度稳定性且具有优异磁性的镍基催化剂。通过傅里叶变换红外光谱、粉末X射线衍射、透射电子显微镜、场发射扫描电子显微镜、热重分析、动态光散射（DLS）、X射线光电子能谱、振动样品磁强计、能量色散X射线分析、电感耦合等离子体分析和氮吸附-脱附等温线分析对其进行了充分表征。选择芳基氨基甲酸酯和/或氨基磺酸酯与芳基硼酸之间的铃木-宫浦偶联反应来证明所制备的磁性纳米催化剂的催化活性和效率。在这类反应中使用上述非均相纳米催化剂可产生产率良好至优异的相应产物，其中催化剂可通过外部磁场轻松从反应混合物中回收，直接重复用于接下来的几个循环，而其活性不会有明显损失。
