Development of Multifunctional Photo-responsive Molecular Magnets

在项目的第二年，发表了7篇论文，合成并表征了约40种新的不同配体的过渡金属配合物，并选择其中最有意义的化合物作为多功能光磁材料的进一步研究。其中，合成了两个新的由三核三角形铜（II）-吡唑和八氰合物（IV）组成的具有强反铁磁相互作用和自旋阻挫的同构三维体系，分析了它们的磁性和光学性质，并使用理论计算描述了提高光磁效应的效率（Inorg. Chem. 2022，61，8930）。低频THz吸收和拉曼散射的进一步研究（对快速无线通信的发展很重要），单分子磁体行为（可应用于复杂的高密度存储器件），和可见/近红外发光测温性能（用于生物成像）在Ln（III）中-（NCS/NCSe）和Ln（III）-[Au（SCN/CN）2]化合物用于在光磁系统中进一步实施（J. Mater. C 2023，11，1008; Adv.Opt.Mater. 2022，10，2201675; Int. J. Mol. Sci. 2022，23，6051）。由于镧系元素络合物的非常有前景的结果，制备并测试了类似的Fe（II）-[Hg（SCN）4]络合物，获得了表现出亚太赫兹吸收的顺磁性材料（Angew. Chem.Int.Ed.2023，62，e2022146）和在二次谐波产生和圆二色性的测量中观察到的非线性光学效应（Inorg.Chem.2023，62，3278）。

In the second year of the project, 7 articles were published, and about 40 new transition metal complexes with different ligands were synthesized and characterized, with the most significant ones selected for further study on multifunctional photomagnetic materials. Among them, two new isostructural three-dimensional systems consisting of trinuclear triangle copper(II)-pyrazole and octacyanidometallates(IV) with strong antiferromagnetic interactions and spin frustration were synthesized, analyzed for their magnetic and optical properties, and described using theoretical calculations to improve the efficiency of the photomagnetic effect (Inorg. Chem. 2022, 61, 8930). Further studies on low-frequency THz absorption and Raman scattering (important for the development of fast wireless telecommunication), single-molecule magnet behavior (applicable in sophisticated high-density memory devices), and visible/near-infrared luminescence thermometric properties (used in bioimaging) in Ln(III)-(NCS/NCSe) and Ln(III)-[Au(SCN/CN)2] compounds for further implementation in photomagnetic systems have been studied (J. Mater. Chem. C 2023, 11, 1008; Adv. Opt. Mater. 2022, 10, 2201675; Int. J. Mol. Sci. 2022, 23, 6051). Due to the very promising results for lanthanide complexes, similar Fe(II)-[Hg(SCN)4] complexes were prepared and tested, obtaining paramagnetic materials exhibiting sub-terahertz absorption (Angew. Chem. Int. Ed. 2023, 62, e2022146) and non-linear optical effects observed in measurements of second harmonic generation and circular dichroism (Inorg. Chem. 2023, 62, 3278).