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

基本信息

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

项目摘要

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.

Kim Dunbar博士在化学分部的无机，生物有机和有机化化学计划的支持下，阐明了几个磁性簇和材料家族中的结构/磁化关系。具体而言，提出的工作（i）将扩大邓巴博士实验室中的最新发现，即与Fe，Co，Mn和Ni一起表现出TCNQ阴离子的二元过渡金属化合物，表现出一种类似铁磁的行为，最好将其描述为自旋玻璃。（ii）将探索各种几何形状的开放壳金属系统中的多吡啶型配体，其中金属将能够相互交流；（iii）将检查分子组件，其中使用八面体金属离子与氰基或金属二氧链链接合成顺磁正方形和立方体。从项目中得出的知识库将对物理和材料研究产生重大影响；此外，它将提供对基于分子的磁性材料的理解。将发现新型的分子材料在磁性存储设备，电或磁性双态设备以及将磁化磁化器的微型化到纳米级水平等应用中具有基本的技术相关性。研究生和本科生，以及博士后同事将在一个具有非凡重要性的领域进行培训，并将为工业或学术就业开放场地。