Preparation of Paramagnetic Ligands for Coordination -Complexes and Networks with Interesting Magnetic Properties

该奖项由特别项目办公室颁发，涉及具有有趣磁性质的金属配合物和网络的设计、合成和表征。重点将放在具有两个或三个邻醌或半醌结构的芳烯和聚芳烯环的合成上，这些环取决于它们的氧化态将是顺磁性的，并且能够结合高自旋八面体过渡金属。在半醌状态下，配体将是自由基阴离子，因此它们的金属配合物不需要任何支持的反离子。由此产生的中性、三维配合物和网络将在三维上表现出强耦合，并应表现出体磁性。配体和配合物将用循环伏安法、电子顺磁共振、晶体学和磁强计进行表征。有机分子磁体是一个高度学术和技术兴趣的领域。这个项目的成功将促进对磁性分子基础的基本理解。此外，空气稳定，重量轻的有机磁铁将找到许多商业应用，从小型电动机到信息存储。

This award made in the Office of Special Projects deals with the design, synthesis and characterization of metal coordination complexes and networks with interesting magnetic properties. Emphasis will be on the synthesis of arylene and polyarylene rings bearing two or three o-quinone or semiquinone structures which, depending on their oxidation state will be paramagnetic and capable of binding to high-spin octahedral transition metals. In the semiquinone state, the ligands will be radical anions so that their metal complexes will not require any supporting counterions. The resulting neutral, three dimensional complexes and networks will exhibit strong coupling in three dimensions and should exhibit bulk magnetism. The ligands and complexes will be characterized by cyclic voltammetry, electron paramagnetic resonance, crystallography and magnetometry. Organic molecular magnets are an area of high academic as well as technological interest. Success of this project will advance the fundamental understanding of the molecular basis for magnetism. Additionally, air-stable, light weight organic magnets will find numerous commercial applications ranging from small electric motors to information storage.