Ordered Arrays of Metals with Polynitrile or Cyanide Ligands

具有聚腈或氰化物配体的有序金属阵列

• 批准号: 9622589
• 负责人: Kim Dunbar
• 金额: $ 35.1万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-08-01 至 2000-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9622589&HistoricalAwards=false
• 关键词: Ordered; Arrays; Metals; Polynitrile; Cyanide

This award in the Inorganic, Bioinorganic, and Organometallic Chemistry Program provides support for research on synthesis of organonitrile-bridged transition metal compounds by Dr. Kim R. Dunbar of the Chemistry Department, Michigan State University. Chain, layered and three-dimensional assemblies will be constructed and crystallized, and their magnetic and conducting properties determined. Acetonitrile compounds undergo facile substitution reactions so that a variety of ligands can be added to moderate properties. Solubility for extended arrays will be enhanced by varying charge on metal precursors, varying substituents on organic groups, and varying outer sphere ions present in extended networks. Compounds will be of two main types. One type of compound will contain transition metals sigma-bonded to the nitrogen atom lone pairs of polynitrile acceptors. Species such as tetracyanoethylene (TCNE) will be used. In these systems, paramagnetic metal centers are assembled into the organic radical network. The second type of compound consists of transition metal cyanide complexes reacted to form extended arrays of ferro- or ferrimangnetically coupled chains or two-dimensional networks. In this research, synthesis of transition metal nitrile compounds will be controlled so that pure crystals of one-, two-, or three-dimensional arrays will be formed. The arrays are expected to exhibit unusual magnetic properties which will be able to be correlated with structural arrangement. By manipulating the organic groups attached to the metals, the solubility of the compounds will be controlled in order to build specific types of molecular arrangements and crystal growth.

该奖项属于无机、生物无机和有机金属化学项目，为密歇根州立大学化学系 Kim R. Dunbar 博士的有机腈桥过渡金属化合物合成研究提供支持。 链式、分层式和三维组件将被构建和结晶，并确定它们的磁性和导电特性。 乙腈化合物容易发生取代反应，因此可以添加各种配体以达到适度的性能。 通过改变金属前体上的电荷、改变有机基团上的取代基以及改变扩展网络中存在的外球离子，可以增强扩展阵列的溶解度。 化合物有两种主要类型。 一种类型的化合物将包含与多腈受体的氮原子孤对对键合的过渡金属。 将使用四氰乙烯（TCNE）等物质。 在这些系统中，顺磁性金属中心被组装成有机自由基网络。 第二种类型的化合物由过渡金属氰化物配合物组成，反应形成铁磁或亚铁磁耦合链或二维网络的扩展阵列。 在这项研究中，将控制过渡金属腈化合物的合成，从而形成一维、二维或三维阵列的纯晶体。 这些阵列预计将表现出不寻常的磁性，这将能够与结构排列相关。 通过操纵附着在金属上的有机基团，可以控制化合物的溶解度，以构建特定类型的分子排列和晶体生长。