Abstract
The complexes [Tb(Bipy)2(H2O)2Cl2]Cl (I), [Ln(Bipy)(H2O)6]Cl3·2H2O·0.5Bipy (Ln = Dy (II), Yb (IV)), [Er(Bipy)2(H2O)3Cl]Cl2·2H2O (III), and [Yb(Bipy)(H2O)6]Cl3 (V) were prepared using salts LnCl3·6H2O (Ln = Tb, Dy, Er, Yb) and 2,2'-bipyridine (Bipy). The structure of complex V was determined by X-ray diffraction (CIF file CCDC no. 2024688). Magnetic characteristics of the complexes indicate that the replacement of water molecules in the coordination sphere of aqua chlorides by bidentate Bipy ligand gives single-molecule magnets with significant barriers for magnetization reversal, especially in the case of ytterbium compound, ΔE/kB([Yb(Bipy)(H2O)6]Cl3·2H2O·0.5Bipy) = 43 K.




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ACKNOWLEDGMENTS
The study was carried out using the research equipment of the Center for Collective Use of Physical Investigation Methods of the Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences.
Funding
The synthesis and investigation of complexes I and II were supported by the Russian Science Foundation (grant no. 16-13-10407); the synthesis and investigation of complexes III and IV were supported by the Russian Foundation for Basic Research (grant no. 18-33-20155). Elemental analysis was performed within the state assignment for the Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences.
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Petrosyants, S.P., Babeshkin, K.A., Ilyukhin, A.B. et al. Molecular Magnets Based on Mononuclear Aqua and Aqua-Chloro Lanthanide (Tb, Dy, Er, Yb) Complexes with Bipyridine. Russ J Coord Chem 47, 165–173 (2021). https://doi.org/10.1134/S1070328421030039
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DOI: https://doi.org/10.1134/S1070328421030039