Investigation of Spin Transition Processes and Magnetic Exchange Interactions in Discrete Transition Metal Complexes

离散过渡金属配合物中自旋跃迁过程和磁交换相互作用的研究

• 批准号: 5369538
• 负责人: Professor Hans-Jörg Krüger, Ph.D.
• 金额: --
• 依托单位: Fachbereich Chemie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5369538?language=en
• 关键词: Investigation; Spin; Transition; Processes; Magnetic

A detailed study of the magnetic properties of coordination compounds is crucial for understanding the underlying principles of molecular magnetism, a field of research that is currently of growing importance to science and industry. In this proposal the preparation and characterization of homo- and heteronuclear complexes, which contain 1-4 metal ions and which display distinct molecular topologies of the magnetic centers, are described. The objective of the present research proposal is a systematic study of the magnetic properties as a function of d electron configurations of the metal ions, steric and electronic properties of the ligand, type of bridging ligand, and molecular topology of the magnetic centers. In particular, this investigation focusses on the characterization of spin crossover properties of metal ions with d4-d6 electron configurations and on the magnetic exchange interactions between metal ions as well as between metal ions and p-radical ligands in discrete molecules. Special consideration is given to the study of switching the magnetic properties of the complexes by changing temperature or pressure, by irradiation of light, or by changing the redox state of the bridging ligand. The compounds serve as models for testing and refining current theoretical concepts which describe these facts of molecular magnetism.

对配位化合物磁性的详细研究对于理解分子磁性的基本原理至关重要，分子磁性是目前对科学和工业越来越重要的研究领域。在该提案中，描述了同核和异核配合物的制备和表征，该配合物含有 1-4 个金属离子，并显示出不同的磁中心分子拓扑结构。本研究计划的目的是系统研究磁性与金属离子 d 电子构型、配体的空间和电子特性、桥接配体的类型以及磁性中心的分子拓扑的函数关系。特别是，本研究重点关注具有 d4-d6 电子构型的金属离子的自旋交叉特性的表征，以及金属离子之间以及金属离子与离​​散分子中的 p 自由基配体之间的磁交换相互作用。特别考虑通过改变温度或压力、通过光照射或通过改变桥配体的氧化还原态来切换配合物的磁性的研究。这些化合物充当测试和完善当前描述分子磁性事实的理论概念的模型。