Ligand design for multifunctional molecule-based magnetic materials

广义上的分子基材料是一个术语，本质上是为了区分经典的无机原子基固体和由预先设计的分子实体构建的材料。因此，取代固态化学典型的高温合成，分子基材料通过传统上来自有机化学、配位化学和超分子化学的软路线获得。在生物系统中，基于分子的材料可以由几个专门设计的独特分子构建，其中功能的总和可以产生新的或不存在的特性。我的研究计划是针对实现分子基磁性材料，其中有两个或两个以上的物理性能之间的相互作用。研究将集中在两类化合物的制备和研究，即自旋轴承四硫富瓦烯（TTF）供体和自旋交叉（SCO）化合物。在第一个项目中，TTF供体共价附加自旋轴承verdazyl自由基将结合在一起，与阴离子形成固体的磁性和/或导电性能。详细的结构和物理研究新的自旋轴承捐助者将使我们能够评估它们是否是合适的积木制备铁磁导体。在第二个项目中，将制备和研究一种称为自旋交叉化合物的新型开关材料。这些材料中，例如，你可以应用光或温度的变化，以切换它们的磁性行为。 我们特别感兴趣的是制备两个或更多个开关单元共价连接在一起的系统，因为通过这种方式，我们可以研究单元之间的协同性如何通过不同的连接体影响它们的开关特性。最大的挑战是开发在室温或室温附近切换的系统，因为这对于设备应用来说更便宜。该计划代表了开发和理解两类多功能分子基磁性材料的独特方法，这些磁性材料可能会导致商业应用。

Molecule-based materials, in the broad sense, is a term coined essentially to make a distinction between classic inorganic atom-based solids and materials built from pre-designed molecular entities. Thus, instead of high temperature synthesis typical of solid state chemistry, molecule-based materials are obtained through soft routes, traditionally from organic chemistry, coordination chemistry and supramolecular chemistry. As in biological systems, molecule-based materials can be built from several specifically designed unique molecules, where the sum of functions could yield new or non-existing properties. My research program is directed towards the realization of molecule-based magnetic materials where there is interplay between two or more physical properties. Research will focus on the preparation and study of two classes of compounds namely, spin bearing tetrathiafulvalene (TTF) donors and spin crossover (SCO) compounds. In the first project, TTF donors covalently appended with spin bearing verdazyl radicals will be combined together with anions to form solids with magnetic and/or conducting properties. Detailed structural and physical studies of new spin bearing donors will enable us to assess whether or not they are suitable building blocks for the preparation of ferromagnetic conductors. In the second project, a new family of switching materials known as spin crossover compounds will be prepared and studied. These are materials in which for example you can apply light or a change in temperature in order to switch their magnetic behavior. We are particularly interested in preparing systems where two or more switching units are covalently linked together, since in this way we can investigate how the cooperativity between the units through different linkers affects their switching properties. The greatest challenge is to develop systems that switch at or around room temperature since this would be cheaper for device applications. This program represents a unique approach for the development and understanding of two classes of multifunctional molecule-based magnetic materials that could lead to commercial applications.