Observation of field-induced single-ion magnet behavior in an octahedral dysprosium complex with a strong ligand field

Abstract

By employing oxygen-containing ligands with strong coordination ability, a mononuclear six-coordinate Dy^III complex [Dy(Ph₃PO)₃(OPhCl₂NO₂)₃] (1) (Ph₃PO = triphenylphosphine oxide, Cl₂NO₂PhOH = 2,6-dichloro-4-nitrophenol) with an octahedral DyO₆ coordination environment has been successfully synthesized. Magnetic measurements reveal that complex 1 exhibits field-induced slow magnetic relaxation with an energy barrier of 21.3 K, which provides a rare case for mononuclear octahedral Ln-based complexes with slow magnetic relaxation behavior.