Quinone-based single-molecule magnets

该项目见证了双方申请人之间的合作。目的是开发自由基桥联的双核和三核过渡金属单分子磁体，其具有高的磁矩弛豫能垒和强的磁性能。这种配合物可以在磁性数据存储中找到应用，并进一步理解金属-自由基配合物的磁性。为此，我们将首先优化我们先前确定的有前途的单分子磁体构建块。随后，我们将开发和研究基于这些积木的双核和三核配合物，其中桥接配体的自由基性质产生强磁耦合。预计强耦合抑制势垒下的弛豫过程，这是有害的磁双稳态所需的bavity。我们利用申请人的互补能力和专业知识。因此，Sarkar小组将设计所有的积木和多核复合物。他们将开发和优化合成，分离和表征产品。最后，他们将研究复合物的氧化还原化学，并分离和表征具有自由基桥的氧化还原产物。该货车Slageren将进行所有静态和动态磁调查，以调查磁各向异性和交换耦合，以及磁化弛豫行为。他们还将利用先进的磁共振和光学技术进行深入的光谱研究，以建立复合物的磁性和电子结构之间的关系。

This project sees the continuation of the collaboration between both applicants. The aim is to develop radical bridged di- and trinuclear transition metal single-molecule magnets with high energy barriers toward relaxation of the magnetic moment and strong coercivities. Such complexes may find application in magnetic data storage and further the understanding of the magnetic properties of metal-radical complexes. To this end we will first optimize the promising single molecule magnet building blocks we have previously identified. Subsequently, we will develop and investigate di- and trinuclear complexes based on these building blocks, where the radical nature of the bridging ligands engenders strong magnetic couplings. The strong couplings are expected to suppress underbarrier relaxation processes which are detrimental for the coercivity required for magnetic bistability. We exploit the complementary competences and expertise of the applicants. Thus, the Sarkar group will design all building blocks and polynuclear complexes. They will develop and optimize the syntheses and isolate and characterize the products. Finally, they will study the redox chemistry of the complexes and isolate and characterize the redox products with radical bridges. The Van Slageren will carry out all static and dynamic magnetic investigations to investigate the magnetic anisotropy and exchange couplings, as well as the magnetization relaxation behaviour. They will also carry out in-depth spectroscopic studies using advanced magnetic resonance and optical techniques to establish the relation between the magnetic properties and the electronic structures of the complexes.