Transition Metal Clusters as Single-Molecule Magnets

这个无机、生物无机和有机金属项目的奖项支持佛罗里达大学化学系George Christou教授对单分子磁铁（SMMs）的合成和研究。这些分子在低温时表现为宏观上的磁铁，但在温度升高时表现出量子隧穿磁化（QTM），这是导致磁性行为丧失的原因。将从多核锰配合物的羧酸衍生物和一些铁化合物中制备一系列新的smm。smm的超分子聚集体将被合成，以提高QTM的屏障，并允许它们在高于几开尔文的温度下作为磁铁工作。这项研究的目标是开发最终可以在实际温度下工作的分子磁体，类似于高温超导体的开发。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的理解，以及在较高温度下控制其损失的因素。参与这个多学科项目的学生将接受广泛的培训，为他们在工业界和学术界的职业生涯做好准备。

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.