Silica-coated magnetite nanoparticles stabilized simple Mn-tetraphenylporphyrin for aqueous phase catalytic oxidations with tert-butyl hydroperoxide

• Published in: RSC advances 2014, Vol.4 (18), p.9189-9196
• Main Authors: Rezaeifard, Abdolreza, Farshid, Parisa, Jafarpour, Maasoumeh, Moghaddam, Gholamreza Kardan
• Format: Article
• Language: English
• Subjects: Catalysts; Economic conditions; Economics; Manganese; Nanostructure; Olefins; Oxidation; Scanning electron microscopy
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/c3ra47288d

An economic and environmentally friendly system for efficient and selective oxidation of industrially and biologically important substrates in water using tert-butyl hydroperoxide catalyzed by a new magnetically recoverable Mn-porphyrin was developed. The easily prepared heterogeneous catalyst was characterized by powder X-ray diffraction, transmission electron microscopy, scanning electron microscopy, FT-IR and UV-vis spectroscopy. The size of the catalyst was estimated to be about 10 nm. The thermal gravimetric analysis demonstrated that the nanocatalyst was thermally stable up to almost 300 degree C. The reactivity, selectivity and scope of the reaction were investigated with a variety of olefins, saturated hydrocarbons, alcohols and organosulfur compounds. The reactions proceeded smoothly in the absence of surfactants, organic co-solvents and thus take place "on water". The separation and recycling of nanocatalyst as well as isolation of water-insoluble products were simple, effective and economical in this clean oxidation method.