Transition Metal Sulfur and Oxygen Chemistry

本项目在无机、生物无机和有机金属化学专业的重点是金属-硫和金属-氧化学，重点发展第5族金属-硫和锰-氧化学。一个目标是探索5族金属硫化合物的结构、物理化学性质和反应性，作为金属同质（V、Nb或Ta）和氧化水平的函数。所研究的配体是硫酸盐和硫化物。特别令人感兴趣的是单键或多键金属团簇的合成，仅由硫基连接支撑。第二个目标是合成高氧化态的化合物（II）含有氧化桥的锰化合物，主要是羧酸酯连接。这项工作还包括寻找越来越高的核物质，这些物质有望具有新的结构和磁性。并且与含有高核M/O聚集体的生物系统和单畴磁性氧化物颗粒的磁性相关。一些即将合成的新化合物有望成为诸如参与光合作用的金属蛋白等重要金属蛋白的改进模型。对高核金属氧配合物的研究将使我们更好地了解伴随磁铁矿等金属氧化物粒度变化而发生的磁性行为变化。磁性金属氧化物用于数字数据存储。

The focus of this project in the Inorganic, Bioinorganic and Organometallic Chemistry Program is metal-sulfur and metal-oxygen chemistry, with emphasis on the development of Group 5 metal-sulfur and manganese-oxygen chemistry. One objective is to explore the structures, physicochemical properties and reactivities of group 5 metal-sulfur compounds as a function of metal identity (V, Nb or Ta) and oxidation level. The ligands under study are thiolates and sulfide. Of especial interest is the synthesis of singly- or multiply-bonded metal clusters supported solely by sulfur-based ligation. A second objective is the synthesis of compounds of higher oxidation state (II) compounds of manganese containing oxide bridges and with primarily carboxylate ligation. Also encompassed in this work is a search for higher and higher nuclearity species, which are expected to possess novel structural and magnetic properties, and be of relevance both to biological systems containing high nuclearity M/O aggregates and to the magnetic properties of single-domain magnetic oxide particles. Some of the new compounds which will be synthesized are expected to be improved models of such important metalloproteins as those which are involved in photosynthesis. Studies of the high nuclearity metal-oxygen complexes will provide a better understanding of the changes in magnetic behavior which accompany changes in particle size of such metal oxides as magnetite. Magnetic metal oxides are used in digital data storage.