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- W2350436763 abstract "Unsymmetrical Schiff base complexes with pendant aza-crown or morpholino groups had been studied as catalysts in aerobic oxidation of p-xylene to p-toluic acid(PTA)with air at 120℃ under normal atmospheric pressure.The effects of central metal of Schiff base complexes,the aza-crown ether group pendant and substituents group in Schiff base ligands on the oxidation of p-xylene were also investigated.The results revealed that the catalytic activity of Schiff base complexes binding benzo-10-aza-crown ether pendants could be visibly improved and the induce period of the oxidation for p-xylene to p-toluic acid was shortened.Schiff base manganese(Ⅲ) complexes had higher catalytic activity than both cobalt(Ⅱ)and copper(Ⅱ) complexes.Significant selectivity(up to 90%)and conversion levels(up to~75%)were obtained in the presence of aza-crown ether substituted unsymmetrical Schiff base Mn(Ⅲ)complexes." @default.
- W2350436763 created "2016-06-24" @default.
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- W2350436763 date "2012-01-01" @default.
- W2350436763 modified "2023-09-25" @default.
- W2350436763 title "Study on catalytic oxidation for p-xylene to p-toluic acid by unsymmetrical Schiff base complexes with pendant aza-crown ether" @default.
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