Molecules, Large Clusters and Extended Arrays with Open-Shell Metal-Ligand Units: Syntheses, Magento-Structural Correlations and Applications to Materials Design

具有开壳金属配体单元的分子、大簇和扩展阵列：合成、Magento 结构相关性及其在材料设计中的应用

• 批准号: 9906583
• 负责人: Kim Dunbar
• 金额: $ 36万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-07-01 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9906583&HistoricalAwards=false
• 关键词: Molecules; Large; Clusters; Extended; Arrays

Dr. Kim Dunbar is being supported by the Inorganic, Bioinorganic and Organometallic Chemistry Program of the Chemistry Division to elucidate structure/magnetochemical relationships in several families of magnetic clusters and materials. Specifically, the work proposed (i) will expand recent findings in Dr. Dunbar's laboratory that binary transition metal compounds of the TCNQ anion radical with Fe, Co, Mn and Ni exhibit a ferromagnetic-like behavior best described as a spin glass; (ii) will explore polypyridine-type ligands in open-shell metal systems of varied geometries in which metals will be able to communicate with each other; and (iii) will examine molecular assemblies in which octahedral metal ions are used to synthesize paramagnetic squares and cubes with cyano or metal-dicyano linkages. The knowledge base derived from the projects will have a significant impact in physics and in materials research; in addition, it will provide an understanding of molecule-based magnetic materials. Novel molecular materials will be discovered that will have fundamental technological relevance in such applications as magnetic storage devices, electrically or magnetically bistable devices and miniaturization of magnetics to the nanoscale level. Graduate and undergraduate students, and post-doctoral associates will be trained in an area that has exceptional importance and that will open up venues for either industrial or academic employment.

金·邓巴博士得到了化学部无机、生物无机和有机金属化学项目的支持，以阐明几个磁性团簇和材料家族中的结构/磁化学关系。具体地说，拟议的工作(I)将扩展Dunbar博士的实验室的最新发现，即TCNQ阴离子自由基与Fe，Co，Mn和Ni的二元过渡金属化合物表现出类似铁磁的行为，最好将其描述为自旋玻璃；(Ii)将探索不同几何结构的开壳金属系统中的多吡啶类配体，在这些系统中，金属将能够相互通信；(Iii)将研究其中八面体金属离子被用于合成具有氰基或金属-二氰基连接的顺磁正方形和立方体的分子组装。来自这些项目的知识库将对物理学和材料研究产生重大影响；此外，它还将提供对基于分子的磁性材料的理解。新的分子材料将被发现，这些材料将在磁存储设备、电或磁双稳设备以及将磁性材料微型化到纳米级等应用中具有基本的技术意义。研究生和本科生以及博士后助理将在一个具有特殊重要性的领域接受培训，这将为工业或学术就业提供场所。