Synthesis, characterization and application of sulfonic acid supported on ferrite-silica superparamagnetic nanoparticles
| Autor: | Mohammad Ali Nasseri, F. Rafiee, Hassan Hassani, Batol Zakerinasab |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Thermogravimetric analysis 010405 organic chemistry Isatin Inorganic chemistry Oxide Infrared spectroscopy Nanoparticle General Chemistry Sulfonic acid 010402 general chemistry 01 natural sciences 0104 chemical sciences Inorganic Chemistry chemistry.chemical_compound chemistry Ferrite (magnet) Magnetic nanoparticles Nuclear chemistry |
| Zdroj: | Applied Organometallic Chemistry. 30:408-413 |
| ISSN: | 0268-2605 |
| DOI: | 10.1002/aoc.3447 |
| Popis: | In this study, the synthesis of sulfonic acid supported on ferrite–silica superparamagnetic nanoparticles (Fe3O4@SiO2@SO3H) as a nanocatalyst with large density of acidic groups is suggested. This nanocatalyst was prepared in three steps: preparation of colloidal iron oxide magnetic nanoparticles (Fe3O4 MNPs), coating of silica on Fe3O4 MNPs (Fe3O4@SiO2) and incorporation of sulfonic acid as a functional group on the surface of Fe3O4@SiO2 nanoparticles (Fe3O4@SiO2@SO3H). The properties of the prepared magnetic nanoparticles were characterized using transmission electron microscopy, infrared spectroscopy, vibrating sample magnetometry, X-ray diffraction and thermogravimetric analysis. Finally, the applicability of the synthesized magnetic nanoparticles was tested as a heterogeneous solid acid nanocatalyst for one-pot synthesis of diindolyloxindole derivatives in aqueous medium. Oxindole derivatives were produced by the coupling of indole and isatin compounds with good to high yields (60–98%). Copyright © 2016 John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
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