Lattice Dynamics and Bistability of Electronically Labile Complexes

电子不稳定配合物的晶格动力学和双稳定性

• 批准号: 9420322
• 负责人: David Hendrickson
• 金额: $ 38.26万
• 依托单位: University of California-San Diego
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-02-01 至 1997-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9420322&HistoricalAwards=false
• 关键词: Lattice; Dynamics; Bistability; Electronically; Labile

This award in the Inorganic, Bioinorganic, and Organometallic Chemistry Program supports research by Dr. David N. Hendrickson of the Chemistry Department, University of California at San Diego, on electronic effects in metal-containing solids. Detailed studies will be carried out on transition metal complexes that have two or more electronic states which are close in energy. For compounds in which vibrational modes are closely coupled with electronic modes, changes in crystal lattice parameters such as those caused by modifying solvent or counterions can result in spin-crossover or phase transitions in response to changes in light or other external parameters. The primary goal of this project is to verify and characterize magnetic bistability in a molecular species, specifically a dodecanuclear manganese compound. Investigation of optically sensitive iron complexes and electronically sensitive cobalt complexes will also continue. The long-term goal of this research is to develop molecules or collections of molecules for use in electronic circuits and devices. Nanoscale devices which change spin, number of electrons, or magnetic properties in response to electric, magnetic, optical, or thermal changes may be useful for switches or information storage. In this research, compounds containing a small number of metal atoms will be tested for sensitivity and specificity of response to external physical stimuli. Only a few examples of molecules in which the magnetic field changes in response to changes in external magnetic field are known, so this research may open a new area of investigation.

这个奖项在无机，生物无机和有机化学计划支持研究博士大卫N。他是加州大学圣地亚哥分校化学系的Hendrickson博士，研究含金属固体中的电子效应。 将对具有两个或多个能量接近的电子态的过渡金属配合物进行详细的研究。 对于其中振动模式与电子模式紧密耦合的化合物，晶格参数的变化（例如由改性溶剂或抗衡离子引起的那些）可响应于光或其它外部参数的变化而导致自旋交叉或相变。 该项目的主要目标是验证和表征分子物种，特别是十二核锰化合物的磁双稳态。 对光学敏感的铁配合物和电子敏感的钴配合物的研究也将继续。 这项研究的长期目标是开发用于电子电路和设备的分子或分子集合。 响应于电、磁、光或热变化而改变自旋、电子数或磁性质的纳米级器件可用于开关或信息存储。 在这项研究中，将测试含有少量金属原子的化合物对外部物理刺激反应的敏感性和特异性。 只有少数几个分子的例子，其中的磁场变化响应于外部磁场的变化是已知的，所以这项研究可能会打开一个新的研究领域。