关键词: 交联聚苯乙烯, 苯基卟啉, 固载, 钴卟啉

Abstract: Synchronistic synthesis and immobilization of phenyl porpherin on crosslinked polystyrene microspheres(CPS) were realized successfully using benzaldehade, pyrrole and the microspheres HBA-CPS, on which hydroxyl benzaldehyde was bound, as the reactants and with Adler method, and the microspheres PP-CPS, on which phenyl porphyrin (PP) was immobilized, was prepared. In this investigation, the effects of the main factors on the process of synchronistic synthesis and immobilization of phenyl porpherin were studied. The coordination reaction between the microspheres PP-CPS and cobalt salt was also conducted, and the functional microspheres CoP-CPS, on which cobalt porphyrin (CoP) was immobilized, was obtained. The catalytic activity of CoP-CPS for the oxidation of ethyl benzene by dioxygen was examined. The experimental results show that the synchronistic synthesis and immobilization of phenyl porpherin on crosslinked polystyrene microspheres (CPS) can be carried out by the microspheres HBA-CPS, benzaldehade and pyrrole as reactants via the Adler reaction between solid phase and liquid phase. This is a new route to prepare immobilized porphyrin. In the process of the synchronistic synthesis and immobilization of porpherin, the acidity of the catalysts and the polarity of the solvents affect the synchronistic synthesis and immobilization of porpherin greatly. As the catalyst with a pK_a value in the region of 2.8—3.4 is used, the microspheres PP-CPS with a higher immobilization amount of porphyrin will be obtained. When the solvent with higher polarity is used, the obtained microspheres PP-CPS have a higher immobilization amount of porphyrin. The microspheres CoP-CPS have obvious catalytic activity in the oxidation reaction of ethyl benzene by dioxygen.

Key words: Crosslinked polystyrene, Phenyl porphyrin, Immobilization, Cobalt porphyrin