Insight into ferromagnetic interactions in Cu<sup>II</sup>–Ln<sup>III</sup> dimers with a compartmental ligand
Anangamohan Panja, Sagar Paul, Eufemio Moreno Pineda, Radovan Herchel, Narayan Ch. Jana, Paula Brandão, Ghénadie Novitchi, Wolfgang Wernsdorfer
Abstract
ion for all the complexes, as often observed. Moreover, μ-SQUID studies, at sub-Kelvin temperatures, show S-shaped hysteresis loops indicating the presence of antiferromagnetic coupling in complexes 1-3. The antiferromagnetic interaction is explained by considering the shortest Cu⋯Cu distance in the crystal structure. The nearly closed loops for 1-3 highlight their fast relaxation characteristics, while the opened loops for 4 might arise from intermolecular ordering. CASSCF calculations allow the quantitative assessment of the interactions, which are further supported by BS-DFT calculations.
Topics & Concepts
FerromagnetismLigand (biochemistry)CrystallographyChemistryPhysicsMaterials scienceCondensed matter physicsReceptorBiochemistryMagnetism in coordination complexesLanthanide and Transition Metal ComplexesMetal complexes synthesis and properties