The preparation, characterization and application of COOH grafting on ferrite-silica nanoparticles

Hassani H.; Zakerinasab B.; Nasseri M. A.; Shavakandi M.

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The preparation, characterization and application of COOH grafting on ferrite-silica nanoparticles

机译：铁素体二氧化硅纳米粒子COOH接枝的制备，表征及应用

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Magnetic materials grafted with carboxylic acid (Fe3O4@SiO2@COOH MNPs) were successfully prepared via the incorporation of maleic anhydride as a functional group on the surface of ferrite-silica nanoparticles. The properties of the magnetite nanoparticles prepared were characterized using transmission electron microscopy (TEM), FT-infrared spectroscopy (FT-IR), vibrating sample magnetometer (VSM), and X-ray diffraction (XRD) analysis. The prepared magnetic catalyst (Fe3O4@SiO2@COOH) showed a high catalytic activity for the synthesis of diindolyl oxindoles via the coupling of indole and isatin compounds. The products were produced with good to high yield in an aqueous medium. The catalyst could be readily separated from the reaction mixture using a permanent magnet and showed high stability in recycling experiments.

机译：通过将马来酸酐作为官能团作为铁素体 - 二氧化硅纳米颗粒表面的官能团成功制备嫁接羧酸（Fe3O4 @ SiO 2 @ CoOH MNP）的磁性材料。使用透射电子显微镜（TEM），FT红外光谱（FT-IR），振动样品仪（VSM）和X射线衍射（XRD）分析来表征制备的磁铁矿纳米粒子的性质。制备的磁性催化剂（Fe 3 O 4 / SiO 2 @ CoOH）显示了通过吲哚和Isatin化合物的偶联来合成二吲哚基氧胆吲哚的高催化活性。在含水介质中良好地生产产物。催化剂可以使用永磁体容易地与反应混合物分离，并在再循环实验中显示出高稳定性。

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《RSC Advances》 |2016年第21期|共7页
作者
Hassani H.; Zakerinasab B.; Nasseri M. A.; Shavakandi M.;
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Payam Noor Univ Dept Chem Birjand Iran;

Payam Noor Univ Dept Chem Birjand Iran;

Univ Birjand Coll Sci Dept Chem Birjand 97175615 Iran;

Payam Noor Univ Dept Chem Birjand Iran;

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正文语种 eng
中图分类化学;
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The preparation, characterization and application of COOH grafting on ferrite-silica nanoparticles

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