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.

磁铁在现代社会中无处不在，在从生物医学成像和癌症治疗到信息技术，国家和国际防御和安全以及外部空间研究的广泛应用中。在工业和学术领域，现代研究的主要目标之一是这种技术的小型化。这完全依赖于基本科学研究，以及对结构与磁行为之间内在关系的研究和理解。这需要化学家设计和建立分子和基于分子的材料的家庭，并通过与凝聚态物理学家，理论家和材料科学家的广泛合作来理解并最终利用其潜在的物理特性。 Wernsdorfer和同事最近对单分子旋转阀和晶体管的最新构建以及通过IBMS报告在Fe Atoms的表面阵列中的信息存储报告都很好地证明了这一点。分子磁性的学术领域代表了一种逐个原子的原子，逐个分子的方法来构建新的磁性材料。分子或“自下而上”方法比“自上而下”方法具有许多潜在的优势：分子是可溶的，大小和形状的单分散，可以通过简单的合成化学生成具有可调，设计师，物理特性的简单合成化学生成材料来改变。该建议首先涉及基于高度各向异性4/5D离子的单核复合物库的合成，结构和磁性表征。然后将这些络合物用作朝向3D金属离子或复合物的金属材料，并有望通过可预测的结构和可调的磁性行为来建造预设计的金属笼子的合理途径。它还涉及将各向异性金属载体的附着在众所周知且表征良好的预制分子磁体上，例如CO4，MN6，NI12，FE17，以检查对磁化弛豫动力学的影响并得出详细的磁结构相关性。