Development of Multifunctional Photo-responsive Molecular Magnets

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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).