ИСТИНА

The development of molecular systems capable of intramolecular electron transfer is a key idea of advanced concepts for the creation of ultra-dense information storage devices, molecular switches and other materials. An example of such systems are transition metal complexes (including polynuclear ones) containing at least two redox centres that are connected by a bridge, which makes it possible to transfer the electron of the ligand to the metal. Such complexes are capable of exhibiting the properties of a molecular magnet, ferromagnetic/antiferromagnetic interactions. Due to a possible spin transition, they can be used as molecular switches in the case of using 3d4-3d7 metals ions. Such spin crossover will create several magnetic states in this system, between which it will be possible to switch. In our work, a hydrobenzamide ligand (L) of the N2O3 type was synthesized, capable of binding two transition metal ions (for example, Mn3+), forming binuclear complexes with the implementation of propeller geometry. The obtained binuclear complexes were characterized by X-ray diffraction analysis, cyclic voltammetry and magnetometry. For the manganese complexes, the structure of the obtained crystals includes not only molecules of the Mn2L2, but also a cluster of manganese acetate (Mn6(µ-O)2(OAc)10(DMF)4) in a ratio of 3:2, which makes it possible to regulate the magnetic properties of the resulting crystalline material. A similar approach can be transferred on the complexes of related geometry.