权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Fundamental Aspects of the Dinuclear Chemistry of Molybdenumand Tungsten

钼和钨的双核化学的基本方面

基本信息

批准号：
9101664
负责人：
Malcolm Chisholm
金额：
$ 44.98万
依托单位：
Indiana University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1991
资助国家：
美国
起止时间：
1991-05-15 至 1994-10-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9101664&HistoricalAwards=false
关键词：
Fundamental Aspects Dinuclear Chemistry Molybdenumand

项目摘要

The coordination chemistry of dinuclear cationic transition metal complexes of molybdenum and tungsten with formal charges of four to ten will be explored through synthesis and structural methods. Kinetic and mechanistic studies of ligand substitution reactions and the organometallic chemistry of dinuclear metal centers will be initiated. These results may differ substantially from the thoroughly investigated mononuclear complexes due to the influence of the metal-metal bond. Ordered assemblies such as liquid crystals and polymers formed by use of dinuclear metal multiple bonds as building blocks will be investigated, with emphasis on the controllable magnetic, optical, and electronic properties of these macromolecular systems. The dinuclear precursors have first ionization potentials that vary by two volts depending on metal and the substituents; these features should allow a large array of macromolecular systems with tunable electronic properties. %%% In this project in the Inorganic, Bioinorganic, and Organometallic Program of the Chemistry Division, Dr. Malcolm H. Chisholm of Indiana University will continue his studies of the rich chemistry of dinuclear complexes of molybdenum and tungsten. These molecules show considerable promise as homogeneous catalysts. In addition, they can be assembled under proper conditions to form liquid crystals and polymers that may have useful properties as new materials.

将通过合成和结构方法探索形式电荷为 4 至 10 的钼和钨双核阳离子过渡金属配合物的配位化学。将启动配体取代反应和双核金属中心的有机金属化学的动力学和机理研究。由于金属-金属键的影响，这些结果可能与彻底研究的单核配合物有很大不同。将研究使用双核金属多重键作为构件形成的液晶和聚合物等有序组装体，重点是这些大分子系统的可控磁、光学和电子特性。双核前体的第一电离电势根据金属和取代基的不同而变化两伏；这些特征应该允许大量具有可调电子特性的大分子系统。 %%% 在化学系无机、生物无机和有机金属项目的这个项目中，印第安纳大学的 Malcolm H. Chisholm 博士将继续研究钼和钨双核配合物的丰富化学。这些分子显示出作为均相催化剂的巨大前景。此外，它们可以在适当的条件下组装形成液晶和聚合物，这些液晶和聚合物可能具有作为新材料的有用特性。