Abstract
In the present research, the catalytic activity of an immobilized manganese porphyrin onto the surface of multi-walled carbon nanotubes was investigated in the oxidation of alkenes with molecular oxygen as a “green” oxidant under mild conditions. The prepared nanohybrid was fully characterized by X-ray diffraction (XRD), UV-Vis spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy (SEM), thermogravimetry and differential scanning calorimetry (TGA/DSC), Fourier transform infrared (FTIR) and atomic absorption spectroscopy (AAS). Excellent conversion and high selectivity was observed for the oxidation of a variety of olefins in the presence of [Mn(THPP)OAc@MWCNT] at room temperature in 2 hours reaction time. The solid catalyst was reused at least 5 times without any loss of activity or selectivity providing scalability of this catalytic system. Moreover, high turnover number (45500) was achieved for the aerobic oxidation of styrene, which proved the longevity and stability of the supported catalyst.
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