An economic and environmentally friendly system for efficient and selective oxidation of industrially and biologically important substrates in water using tert-butyl hydroperoxide catalyzed by a new magnetically recoverable Mn-porphyrin was developed. The easily prepared heterogeneous catalyst was characterized by powder X-ray diffraction, transmission electron microscopy, scanning electron microscopy, FT-IR and UV-vis spectroscopy. The size of the catalyst was estimated to be about 10 nm. The thermal gravimetric analysis demonstrated that the nanocatalyst was thermally stable up to almost 300 °C. The reactivity, selectivity and scope of the reaction were investigated with a variety of olefins, saturated hydrocarbons, alcohols and organosulfur compounds. The reactions proceeded smoothly in the absence of surfactants, organic co-solvents and thus take place “on water”. The separation and recycling of nanocatalyst as well as isolation of water-insoluble products were simple, effective and economical in this clean oxidation method.
我们开发了一种经济且环境友好的体系,用于在
水相中通过新型磁性可回收
锰卟啉催化
叔丁基过氧化氢实现对工业和
生物学重要底物的有效选择性氧化。该易于制备的非均相催化剂通过粉末X射线衍射、透射电子显微镜、扫描电子显微镜、傅里叶变换红外光谱和紫外-可见光谱进行表征。催化剂的尺寸估计约为10纳米。热重分析表明,纳米催化剂在接近300°C的温度下保持热稳定性。研究了一系列烯烃、饱和烃、醇和
有机硫化合物反应的活性、选择性和范围。这些反应在没有表面活性剂和有机共溶剂的情况下顺利进行,即在“
水中”发生。在这种清洁氧化方法中,纳米催化剂的分离和回收以及
水不溶性产品的分离都简单、有效且经济。