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Molecular Magnets of Re(IV)

Re(IV) 分子磁体

基本信息

批准号：
EP/M008398/1
负责人：
Euan Brechin
金额：
$ 45.39万
依托单位：
University of Edinburgh
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2014
资助国家：
英国
起止时间：
2014 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FM008398%2F1
关键词：
Molecular Magnets Re IV

项目摘要

Magnets are ubiquitous in modern society, employed in an enormous range of applications from biomedical imaging and cancer therapy to information technology, national and international defence and security, and outer-space research. One of the main goals of modern research, in both the industrial and academic sectors, is the miniaturisation of such technologies. This is entirely reliant upon fundamental scientific research, and the investigation and understanding of the intrinsic relationship between structure and magnetic behaviour. This requires chemists to design and build families of molecules and molecule-based materials, and through extensive collaboration with a network of condensed matter physicists, theoreticians and materials scientists, understand and ultimately exploit their underlying physical properties. This was demonstrated beautifully with the recent construction of single-molecule spin valves and transistors by Wernsdorfer and co-workers, and through IBMs report of information storage in surface arrays of Fe atoms. The academic field of molecular magnetism represents an atom-by-atom, molecule-by-molecule approach to building new magnetic materials. The molecular or "bottom-up" approach has many potential advantages over the "top-down" approach: molecules are soluble, monodisperse in size and shape, amenable to change through simple synthetic chemistry generating materials with tuneable, designer, physical properties. This proposal first concerns the synthesis, structural and magnetic characterisation of a library of mononuclear complexes based on highly anisotropic 4/5d ions. These complexes are then used as metalloligands towards 3d metal ions or complexes, promising a rational route toward the construction of pre-designed metal cages with predictable structures and tuneable magnetic behaviour. It also involves the attachment of anisotropic metalloligands to well-known and well characterised, pre-made molecular magnets, such as Co4, Mn6, Ni12, Fe17, in order to examine the effect on magnetisation relaxation dynamics and to derive detailed magneto-structural correlations.

磁体在现代社会中无处不在，被广泛应用于从生物医学成像和癌症治疗到信息技术、国防和国际国防与安全以及外层空间研究等各种领域。现代研究的主要目标之一，无论是在工业领域还是在学术领域，都是将此类技术微型化。这完全依赖于基础科学研究，以及对结构和磁性行为之间内在关系的调查和理解。这需要化学家设计和构建一系列分子和基于分子的材料，并通过与凝聚态物理学家、理论家和材料科学家组成的网络进行广泛合作，了解并最终开发它们的基本物理性质。Wernsdorfer和他的同事最近建造了单分子自旋阀和晶体管，并通过IBMS报告了铁原子表面阵列中的信息存储，很好地证明了这一点。分子磁学的学术领域代表了一种逐个原子、逐个分子地构建新磁性材料的方法。与“自上而下”的方法相比，分子或“自下而上”的方法有许多潜在的优势：分子是可溶的，在大小和形状上是单分散的，可以通过简单的合成化学来改变，从而产生具有可调的、设计的、物理性质的材料。这一建议首先涉及基于高度各向异性的4/5d离子的单核络合物的合成、结构和磁性表征。然后，这些络合物被用作3D金属离子或络合物的金属配体，有望成为构建具有可预测结构和可调磁性行为的预先设计的金属笼子的合理途径。它还包括将各向异性金属配体附着到众所周知的、特征明确的预制分子磁体，如Co4、Mn6、Ni12、Fe17，以检查对磁化驰豫动力学的影响，并得出详细的磁-结构关联。