锰卟啉功能化多元离子液体体系中苯乙烯及其衍生物环氧化反应

Epoxidation of Styrene and Its Derivatives Catalyzed by a Multi-component Ionic Liquid Functionalized with Manganese Porphyrin

通过在中性锰卟啉分子中引入季铵阳离子和PF6-阴离子,制备了离子型锰卟啉化合物[MnTTMAPP][PF6]5,将其与[bmim]BF4及[bzmim]BF4混合构成锰卟啉功能化的多元离子液体复合体系(MnPy-MIL).实验发现,该体系可以高活性高选择性地催化苯乙烯及其衍生物的环氧化反应.与传统中性锰卟啉催化体系相比,离子型锰卟啉的抗氧化降解能力提高,卟啉自身聚合受到抑制,催化反应无需有机溶剂和轴向配体的参与,同时催化剂可以循环使用.少量水的存在可以提高MnPy-MIL体系的催化性能.

The ionic manganese porphyrin bearing trimethylbenzylammonium cation and PF6^- anion （[MnTTMAPP] [PF615） was mixed with the ionic liquids of [bzmim]BF4 and [bmim]BF4 to build up a manganese porphyrin-functionalized multi-component ionic liquid （MnPy-MIL）, which was used as a catalytic system for expoxidation of styrene and its derivatives with oxidant PhlO. Compared with the traditional neutral manganese porphyrin, the MnPy-MIL system has advantages of suppression of oxidation degradation and selfaggregation, recyclability, and no requirements of additional axial ligands and organic solvents. The presence of a small amount of water could improve the catalytic performance of MnPy-MIL.