Preparation of Immobilized N-hydroxyphthalimide Catalyst on Polymer Microspheres and Primarily Investigation of Its Catalytic Property in Oxidation Reaction

Crosslinked polymer microspheres of glycidyl methacrylate (GMA) and methyl methacrylate (MMA) were first prepared by suspension polymerization, obtaining the polymer microspheres GMA/MMA. Subsequently, N-hydroxyphthalimide (NHPI) was synthesized and immobilized on GMA/MMA microspheres, and the functionalized microspheres GMA/MMA NHPI were obtained through several polymer reaction steps. GMA/MMA-NHPI microspheres were characterized by infrared spectroscopy (FT-IR) and scanning electron microscope (SEM). Results show that the synthesis and immobilization of NHPI on GMA/MMA microspheres can be carried out smoothly. The compositional catalyst system of GMA/MMA-NHPI microspheres and Co(OAc)2 displays fine catalytic activity in the oxidation reactions of cyclohexane and cyclohexanol with molecular oxygen as oxygen source.