title: Sulfonic acid-functionalized silica-coated magnetic nanoparticles as an efficient reusable catalyst for the synthesis of 1-substituted 1H-tetrazoles under solvent-free conditions.
abstract: Regarding green chemistry goals, silica-coated magnetite nanoparticles open up a new avenue to introduce a very useful and efficient system for facilitating catalyst recovery in different organic reactions. Therefore, in this paper the preparation of sulfonic acid-functionalized silica-coated magnetic nanoparticles with core-shell structure (Fe3O4@silica sulfonic acid) is presented by using Fe3O4 spheres as the core and silica sulfonic acid nanoparticles as the shell. The catalyst was characterized by infrared spectroscopy, scanning electron microscopy, X-ray diffraction analysis, dynamic light scattering, thermogravimetric analysis and vibrating sample magnetometry. Nanocatalyst can be recovered using an external magnet and reused for subsequent reactions 6 times without noticeable deterioration in catalytic activity.
authors.affiliation: Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317, IR Iran. naeimi@kashanu.ac.ir.
authors.forename: Hossein
authors.initials: H
authors.lastname: Naeimi
authors.forename: Samaneh
authors.initials: S
authors.lastname: Mohamadabadi
mesh_terms: D002384:Catalysis; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D012822:Silicon Dioxide; D012997:Solvents; D013451:Sulfonic Acids / Q000737:chemistry* / Q000378:metabolism*; D013777:Tetrazoles / Q000138:chemical synthesis*
chemical_list: D058185:Magnetite Nanoparticles; D012997:Solvents; D013451:Sulfonic Acids; D013777:Tetrazoles; C045574:1H-tetrazole; D012822:Silicon Dioxide