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，涉及具有有趣磁性的金属配位络合物和网络的设计、合成和表征。重点将放在含有两个或三个邻苯二酚或半喹酮结构的芳环和聚芳环的合成上，根据它们的氧化状态，这些结构将是顺磁性的，并能够与高自旋的八面体过渡金属结合。在半喹酮状态下，配体将是自由基阴离子，因此它们的金属络合物不需要任何支持的反离子。由此得到的中性三维络合物和网络将在三维上表现出强烈的耦合，并且应该表现出块状磁性。用循环伏安法、电子顺磁共振、结晶学和磁学等方法对配体和配合物进行了表征。有机分子磁体是一个学术和技术都很感兴趣的领域。该项目的成功将促进人们对磁性分子基础的基本理解。此外，空气稳定、重量轻的有机磁体将获得从小型电机到信息存储的众多商业应用。

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.