高分子负载Mn（Ⅲ）卟啉／PhIO体系催化烯烃环氧化反应研究

Epoxidation of Olefin with Iodosylbenzene Catalyzed by Polymer supported Manganese(Ⅲ) Porphyrins

研究了负载化金属卟啉催化烯烃环氧化反应的催化活性，探索了催化反应体系中轴向配体、溶剂、锰卟啉在高分子上的担载量及反应温度等对催化反应的影响．结果表明，金属卟啉负载化后，增大了催化剂的稳定性．本文还考察了负载化催化剂对苯乙烯催化环氧化反应的动力学行为，根据Ｍｉｃｈａｅｌｉｓ－Ｍｅｎｔｅｎ方程。

In this paper we studied the catalytic actvity of supported metalloporphyriins. The influence of axial ligand, solvent, the loaded amount of Mn(Ⅲ) porphyrin and reaction temperature on the epoxidation of styrene catalyzed by these catalysts was also investigated, and the best condition was obtained. Compared with the unsupported Mn(Ⅲ) porphyrins, the supported ones are more effective catalysts for the epoxidation of styrene by PhIO. Immobilization of metalloporphyrins remarkably enhances their stability. The supported metalloporphyrins were easily separated from the reaction systems and could be reused. Finally, the kinetic behavior of olefin epoxidation catalyzed by the supported metalloporphyrins was determined. By the Michaelis Menten equation, the corresponding kinetic parameters were obtained.