کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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59169 | 1419451 | 2013 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: CoFe2O4 nanoparticles: An efficient heterogeneous magnetically separable catalyst for “click” synthesis of arylidene barbituric acid derivatives at room temperature CoFe2O4 nanoparticles: An efficient heterogeneous magnetically separable catalyst for “click” synthesis of arylidene barbituric acid derivatives at room temperature](/preview/png/59169.png)
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.
Graphical AbstractAn efficient protocol for the “click” synthesis of arylidene barbituric acid derivatives using a heterogeneous magnetically separable CoFe2O4 nanocatalyst is presented. The synthesis is simple, clean, and eco-friendly.Figure optionsDownload as PowerPoint slide
Journal: Chinese Journal of Catalysis - Volume 34, Issue 9, September 2013, Pages 1697–1704