A new method for designing two-spin systems has been discovered at the ZIOC by forming a gold-gold bond in the solid phase
Kinetically stable organic paramagnets are of great interest due to their use in catalytic processes, as well as the possibility of designing molecular magnets, spintronic devices, magnetically active sensors, contrast agents for magnetic resonance imaging, and rechargeable electric batteries based on them. At the same time, more and more attention is paid to the development of methods for the preparation, study, and practical use of stable bi- and polyradicals, including those with spin carriers of different nature.
Gold(I) nitronylnitroxy derivatives stabilized by complexation with phosphine ligands have been synthesized at the Laboratory of Paramagnetic Materials and Molecular Spin Systems of the Zelinsky Institute. The resulting complexes were characterized using cyclic voltammetry, electron paramagnetic resonance, IR, and UV/visible spectroscopy. Crystallographic analysis of the complexes using quantum chemical calculations showed the presence of Au–Au bonds (2.930 Å and 3.095 Å) in them, which led to the formation of two spin clusters with the ground singlet state (J» –20 cm–1) in the solid phase.
Igor A. Zayakin, Alexander A. Korlyukov, Dmitry E. Gorbunov, Nina P. Gritsan, Anna Ya. Akyeva, Mikhail A. Syroeshkin, Dmitri V. Stass, Evgeny V. Tretyakov, Mikhail P. Egorov. Organometallics 2022, accepted manuscript. DOI: 10.1021/acs.organomet.2c00200.