研究生专题报告

ABSTRACT:
Organometallic compounds based on transition metals have found numerous applications, e. g. in catalysis, medicine, and material science.
Catalysis research in our group is currently oxidation- and hydrogenation chemistry. Molecular catalysts applied for oxidation processes utilize a broad variety of metals, prominent examples being rhenium, molybdenum, cobalt and, more recently, iron. While the Mo and Re catalysts and catalyst precursors are largely organometallic oxides in their highest oxidation states1 the Fe and Co compounds are ligated by tetradentate donor ligands and in lower formal oxidation states.2 The respective Re and Mo compounds activate either hydrogen peroxide or tert-butyl hydroperoxide. Fe and Co complexes are able to activate both hydrogen peroxide and molecular oxygen (Figure 1) as oxidizing agents and are highly active olefin epoxidation catalysts. Both Mo and Fe oxidation catalysts are very active, their TOFs being among the highest reported to date in oxidation chemistry.
Hydrogenation chemistry aims at the work up of both bio-renewables and carbon dioxide, thus contributing to topics of high current interest.3
Organometallic compounds, however, are also applied in medicinal chemistry4 and as building block for organometallic frameworks.5 Examples for both areas will be presented (Figure 1).