A novel tetra-substituted copper phthalocyanine-multi-walled carbon nanotube composite material [4a(OPh-p-Cl2)CuPc]-MWCNTs was synthesized to effectively catalyze the oxidation of benzyl alcohol to benzaldehyde.The material was easy to obtain and had been well characterized by ultraviolet-visible spectroscopy,X-ray diffraction,fourier transform infrared spectroscopy,scanning electron microscope and transmission electron microscope.In order to achieve high-efficiency and selective catalysis,the effects of solvent type,oxidant type and dosage,catalyst dosage,temperature and reaction time were studied.In the screening experiment,[4a(OPh-p-Cl2)CuPc]-MWCNTs had high catalytic activity in the oxidation of benzyl alcohol.Under the optimal conditions of 5mg [4a(OPh-p-Cl2)CuPc]-MWCNTs,the oxidant was TBHP and the amoumt was 650μL in toluene at 60℃ for 6 h,the highest benzyl alcohol conversion rated 62.12% and benzaldehyde selectivity 93.19% were obtained.In addition,the possible reaction mechanism of [4a(OPh-p-Cl2)CuPc]-MWCNTs complex selectively oxidizing benzyl alcohol to benzaldehyde was also explored.
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