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The Chemistry of the Multielectron Excited State

多电子激发态化学

基本信息

批准号：
9521347
负责人：
Daniel Nocera
金额：
$ 13.7万
依托单位：
Michigan State University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1995
资助国家：
美国
起止时间：
1995-08-01 至 1997-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9521347&HistoricalAwards=false
关键词：
Chemistry Multielectron Excited State

项目摘要

This award in the Inorganic, Bioinorganic, and Organometallic Chemistry Program supports research on multielectron oxidation-reduction processes by Daniel G. Nocera of the Chemistry Department, Michigan State University. The long-term goal is to develop detailed understanding of the mechanism of multielectron processes in order to enable rational design of reactions such as atom transfer and reductive elimination. Reactions of metal-localized excited states of quadruply bonded metal-metal complexes will be investigated. Tungsten and molybdenum complexes and mixed-valence binuclear rhodium fluorophosphine complexes will be synthesized for use in the studies. The photoexcited intermediates generated will be characterized by picosecond and nanosecond time-resolved excited state spectroscopy. Solar photoconversion has great potential as an efficient means of promoting complex chemical transformations which require movement of more than one electron. Such reactions occur in natural systems during nitrogen fixation, but chemists have yet to understand the reaction details well enough to be able to design reactions in which sunlight rather than heat is used beneficially. Much of what is known involves one-electron processes. This project will provide additional information on reactions involving bond breaking and bond making, which are fundamental to chemical transformations and generally involve multiple electrons.

该奖项在无机，生物无机和有机化学计划支持多电子氧化还原过程研究由丹尼尔G.密歇根州立大学化学系的Nocera 大学长期目标是详细了解多电子过程的机制，以使合理的反应设计，如原子转移和还原消除。四重键金属定域激发态的反应将研究金属-金属络合物。钨钼配合物和混合价双核铑氟膦配合物将被合成用于研究。光激发的所产生的中间体将以皮秒为特征，纳秒时间分辨激发态光谱太阳能光电转换作为一种有效的太阳能利用方式具有巨大的潜力。促进复杂的化学转化，这需要更多的这种反应发生在自然系统中，固氮作用，但化学家们还没有了解这种反应能够设计出太阳光而不是有益地使用热量。我们所知的大部分都涉及到单电子过程该项目将提供更多信息关于涉及键断裂和键形成的反应，是化学转化的基础，通常涉及多个电子。