A stable suspension of simple manganese(III) meso‐tetraphenylporphyrin nanoaggregates was prepared by a host–guest procedure, in which ethanol and water are used as “green” solvents. The organic nanoparticles were studied by dynamic light scattering (DLS), AFM, and UV/Vis and fluorescence spectroscopy. The results indicate that the nanoaggregates have a spherical morphology with sizes between 15–40 nm. The epoxidation of olefins and oxygenation of saturated hydrocarbons by PhI(OAc)2 were efficiently enhanced with excellent selectivity under the influence of simple Mn(TPP)OAc (TPP = meso‐tetraphenylporphyrin) nanoparticles. Enhanced stabilities and activities were achieved with nanostructured Mn catalysts compared to those of the individual counterparts in solution according to turnover numbers and UV/Vis studies. The title nanocatalyst facilitates a greener reaction because the reaction solvent is a water/ethanol mixture and PhI(OAc)2 is safe to use. The efficiency of the oxidation system depends critically upon the steric hindrances and electronic structures of both nitrogen donor ligands and porphyrin nanoparticles.
Nanoaggregates of Simple Mn Porphyrin Complexes as Catalysts for the Selective Oxidation of Hydrocarbons. -Colloidal nanoparticles of a manganese porphyrin complex efficiently catalyze the oxidation of saturated hydrocarbons and the epoxidation of olefins. The epoxidation of terminal olefins (VII) and (VIII) is accompanied by a ring-opening reaction leading to corresponding carbonyl compounds. -(REZAEIFARD*, A.; SOLTANI, V.; JAFARPOUR, M.; Eur.
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