多功能自旋转换配位聚合物的定向组装及光磁性能调控研究

Multifunctional spin-crossover complexes have been of intense interest in the research of molecular-based materials due to their potential applications in high-density information storage and spintronic devices. This project will be focused on the composition of spin transition and luminescence. Based on the molecular design, the tetradentate Schiff base-like ligands are used to occupy the coordination sites of the equatorial plane of Fe(II) center, and the multidentate organic ligands with good optical properties (such as fluorescence and optical activity) control the axial sites. A series of organic-inorganic coordination polymers with adjustable structures and properties will be synthesized. At first, we will study the interactions between the specific structures and spin-crossover and luminescent properties to achieve the composition of the spin-crossover and the fluorescence motifs directionally at the molecular level. Furthermore, the organic ligands and solvent templates with different electronic structures as well as light-stimuli will be used to study the responsive behavior of spin-crossover and luminescent properties of the polymers. Then, the intrinsic mechanism between spin-crossover behavior and fluorescent property will be investigated deeply by combining the microscopic crystal structure and the theoretical calculation to realize the synchronous and reversible control of the magneto-optic properties of the polymer by stimulus. This project will provide an effective way for the design and synthesis of novel intelligent magneto-optical composite materials.

多功能自旋转换配合物在超高密度信息存储元件、自旋电子学器件等领域具有广泛的应用前景，是当前分子基材料研究的热点之一。本项目主要关注自旋转换与光的复合问题。从分子设计出发，利用四齿类席夫碱配体控制Fe(II)中心赤道平面的配位点，具有良好光学性质（如荧光、光反应活性）的多齿有机配体占据轴向位点，设计合成一系列结构和性质可调节的有机-无机配位聚合物。研究其特定结构与自旋转换和荧光性质之间的相互作用，以期实现光、磁双功能组元在分子水平上的有序结合。进一步利用不同电子结构的有机配体、溶剂模板以及光刺激，研究聚合物自旋转换和发光性质的应答行为。结合微观晶体结构和理论计算技术深入探讨自旋转换与光的交互作用机制，实现刺激因素对聚合物光磁性质的同步可逆控制，为设计合成新型智能光磁复合材料提供有效途径。

多功能分子基磁性材料在超高密度信息存储元件、多重响应型自旋电子学器件等领域具有广泛的应用前景。本项目从分子设计出发构建多功能磁性配位化合物，主要关注磁与光的复合问题。首先利用功能导向的策略，合成了多种含有磁性构筑基元或发光基元的功能化有机配体，采用溶剂热、分步合成等合成手段，得到了多系列结构新颖的配合物。研究了溶剂模板效应和取代基效应对配合物特定结构和磁学性质的调控规律；通过对配体和溶剂的筛选，首次在二维聚合物中实现了自旋转换和荧光双功能组元的有序结合，并通过磁性的变化实现了对材料发光性能的改善；继而运用理论计算技术深入探讨了自旋转换与光的交互作用机制，成功地证明了处于不同自旋载体与发光体之间能量转移的差异，为制备新型光磁复合材料的研究增添了新鲜内容，并提供了可靠的实验和理论依据。