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Mendeleev Commun., 2025 Volume 35, Issue 6, Pages 676–680 (Mi mendc7340)
Communications

Slow relaxation of magnetization and luminescence in seven- and six-coordinate Tb3+ complexes

D. M. Lyubovab, G. Félixc, A. O. Tolpyginb, T. V. Mahrovab, Yu. V. Nelyubinaa, S. Senec, V. M. Korshunovd, I. V. Taidakovad, A. A. Tyutyunova, B. Le Guennice, O. Cadore, Ya. Guaric, J. Larionovac, A. A. Trifonovab

a A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 119334 Moscow, Russian Federation
b G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 603950 Nizhnii Novgorod, Russian Federation
c Charles Gerhardt Montpellier Institute, National Center for Scientific Research, National School of Chemistry of Montpellier, University of Montpellier, 34293 Montpellier, France
d N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russian Federation
e Rennes Institute of Chemical Sciences, National Center for Scientific Research, University of Rennes, 35000 Rennes, France

Abstract: The synthesis, structures, magnetic and luminescent properties of a new series of mononuclear Tb3+ complexes, such as {Tb[OCH(CF3)Ph]2(THF)5}[BPh4], [Tb(OC6F4C6F5)2(THF)5][BPh4], {Tb[OC(CF3)2Ph]2(THF)4} [BPh4] and {Tb[OC(CF3)3]3(THF)3}, in which fluorinated alkoxide ligands with different steric bulk afford different geometries of the Tb center, are reported. The compound {Tb[OCH(CF3)Ph]2(THF)5}[BPh4], which adopts a pentagonal bipyramidal geometry with an axial O–Tb–O angle of 177.7(5)° and short Tb–O distances, behaves as a field-induced single molecule magnet. All complexes exhibit characteristic Tb3+ emission with a relatively long lifetime of up to 1.7 ms.

Keywords: terbium, alkoxido ligands, synthesis, structure, pentagonal bipyramidal geometry, octahedral geometry, single molecule magnets, luminescence.

Received: 27.06.2025
Accepted: 11.08.2025

Language: English

DOI: 10.71267/mencom.7860


© Steklov Math. Inst. of RAS, 2025