Structural and Experimental Oxidation State Characterization of Molecular Cobalt Complexes

Cobalt compounds offer many exciting possibilities in chemical synthesis and catalysis. In order to realize the potential of cobalt compounds, a profound understanding of their electronic structure is required. We use cobalt compunds to the development of new synthetic procedures for organophosphorus compounds. Complexes containing redox-active 1,2-diimine ligands give access to valuable synthetic building blocks for phosphorus chemistry. Unfortunately, the challenging structural characterisation and oxidation state assignment in these compounds hinders further development. This proposal therefore aims at the thorough and precise the structural elucidation of a series of cobalt complexes using XRD. Moreover, the spectroscopic oxidation states of the Co atoms will be determined using K-edge X-ray absorption spectroscopy (XAS). These data will give valuable insight into the relationship between structure, reactivity and metal oxidation state in the investigated complexes.

钴化合物在化学合成与催化领域展现出诸多极具前景的应用潜力。若要充分发挥钴化合物的应用价值，需对其电子结构具备深入透彻的认知。本研究借助钴化合物开发有机磷化合物的全新合成工艺，其中含氧化还原活性1,2-二亚胺配体的配合物可作为磷化学领域极具价值的合成砌块。然而此类化合物的结构表征与氧化态指认颇具挑战，这一难题阻碍了相关研究的进一步推进。因此本研究拟借助X射线衍射（XRD）技术，对一系列钴配合物开展全面且精准的结构解析；此外，还将通过K边X射线吸收光谱（XAS）测定钴原子的光谱氧化态。上述研究数据将有助于深入理解所研究配合物的结构、反应活性与金属氧化态三者间的内在关联。