Transition Metal Clusters as Single-Molecule Magnets

作为单分子磁体的过渡金属簇

• 批准号: 0123603
• 负责人: George Christou
• 金额: $ 42万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-01 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0123603&HistoricalAwards=false
• 关键词: Transition; Metal; Clusters; Single; Molecule

This award in the Inorganic, Bioinorganic and Organometallic program supports research on the synthesis and study of single molecule magnets (SMMs) by Professor George Christou of the Department of Chemistry at the University of Florida. These molecules behave macroscopically as magnets at low temperature but exhibit quantum tunnelling of magnetization (QTM) which is responsible for loss of magnetic behavior at increasing temperature. A series of new SMMs will be produced from carboxylic acid derivatives of polynuclear manganese complexes as well as from some iron compounds. Supramolecular aggregates of SMMs will be synthesized in order to raise the barrier to QTM and allow them to operate as magnets at temperatures higher than a few degrees Kelvin.The goal of this research is to develop molecular magnets which ultimately can operate at practical temperatures, analogous to the development of higher-temperature superconductors. The results of this research will lead to an enhanced understanding of the factors which produce magnetic behavior in these molecules, as well as to the factors controlling its loss at higher temperatures. The students involved in this multidisciplinary project will receive broad training which will prepare them for careers in both industry and academia.

该奖项在无机，生物无机和有机物计划支持的合成和单分子磁铁（SMM）的研究由佛罗里达大学化学系教授乔治Christou的研究。这些分子在低温下宏观上表现为磁体，但表现出量子磁化隧道效应（QTM），这是导致温度升高时磁行为丧失的原因。从多核锰配合物的羧酸衍生物以及从一些铁化合物将产生一系列新的SMM。将合成SMM的超分子聚集体，以提高QTM的势垒，并允许它们在高于几个开氏度的温度下作为磁体运行。本研究的目标是开发最终可以在实际温度下运行的分子磁体，类似于开发更高温度的超导体。这项研究的结果将有助于加深对这些分子中产生磁性行为的因素以及控制其在较高温度下损失的因素的理解。参与这个多学科项目的学生将接受广泛的培训，为他们在工业和学术界的职业生涯做好准备。