Insight into ferromagnetic interactions in Cu^II–Ln^III dimers with a compartmental ligand

Abstract

In the last two decades, efforts have been devoted to obtaining insight into the magnetic interactions between CuII and LnIII utilizing experimental and theoretical means. Experimentally, it has been observed...

Impact of 3d Metal Ions on the Magnetic Dynamics in Isostructural Tetranuclear Butterfly {Ni2IIDy2III} and {Co2IIDy2III} Complexes

“…In this context, previous experimental and theoretical studies have demonstrated that the incorporation of 3d-4f magnetic interactions represents a potent strategy for suppressing or eliminating QTM process. This is because 3d ions can impart stronger magnetic coupling and/or magnetic anisotropy, while 4f ions contribute significant single-ion magnetic anisotropy. − The seminal work in the field of 3d-4f systems by Gatteschi et al unveiled a fairly strong Cu–Gd ferromagnetic exchange interaction, and finally after two decades, a tetranuclear Cu 2 II Tb 2 III complex has been reported that displayed SMM characteristics for the first time in the class of the 3d-4f system . Thereafter, a large number of SMMs with different nuclearities and topological structures have been reported, particularly those consisting of Cr III , Mn III/IV , Fe II/III , Co II , and Ni II ions. − Among the various transition metal ions involved in the construction of 3d-4f complexes, the Co II - or Ni II -containing systems are quite advantageous as in addition to the usual ferromagnetic interaction between these 3d and 4f metal ions, leading to the large ground spin state, they may also contribute anisotropy to the 3d-4f clusters. ,, Consequently, a number of interesting 3d-4f SMMs with Co II or Ni II ions have been reported with varying nuclearity and topology. − …”