铁酸钴纳米粒子:室温下点击合成亚芳基巴比妥酸衍生物的高效可磁性分离多相催化剂(英文)

作     者：Jaspreet Kaur Rajput Gagandeep Kaur Jaspreet Kaur Rajput;Gagandeep Kaur

作者机构：Department of ChemistryDr.B.R.Ambedkar National Institute of Technology 

出 版 物：《催化学报》 (Cuihua Xuebao Chin. J. Catalysis)

年 卷 期：2013年第34卷第9期

页      面：1697-1704页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：MHRD NIT Jalandhar 

主　　题：Magnetically separable catalyst Arylidene barbituric acid derivative Aqueous ethanol Superparamagnetic CoFe2O4 nanoparticle Heterogeneous catalyst 

摘      要：A coprecipitation method was used to synthesize superparamagnetic CoFe2O4 nanoparticles without using any capping agents/surfactants. The prepared nanoparticles were characterized using Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, a vibrating sample magnetometer (VSM), N2 adsorption and thermogravimetric/differential thermal analysis/differential thermal gravimetry techniques. The synthesized spinel CoFe2O4 nanoparticles had an average size of 2-8 nm with a high surface area (140.9 m2/g). The field-dependent magnetization, demonstrated by VSM and saturation magnetization, was found to be 1.77 emu/g. An efficient method was used for the synthesis of arylidene barbituric acid derivatives using CoFe2O4 magnetic nanoparticles as a magnetically separable and reusable catalyst in aqueous ethanol. The attractive features of this synthetic protocol were very short reaction time, high yields, high turnover frequency, simple work-up procedure, economy, a clean reaction methodology, and chemoselectivity, as well as provision of an ecofriendly and green synthesis.