Macrocycle supported dimetallic lanthanide complexes with slow magnetic relaxation in Dy₂analogues

Abstract

Six dimetallic lanthanide complexes, [Ln2(L′)(acac)4] (1Dy–3Gd) (Ln = Dy (1Dy), Tb (2Tb) and Gd (3Gd)) and [Ln2(L′)(tfac)4] (4Dy–6Gd) (Ln = Dy (4Dy), Tb (5Tb) and Gd (6Gd)) (H2L′ = 1,9-dichloro-3,7,11,15-tetraaza-1,9(1,3)-dibenzenacyclohexadecaphane-2,10-diene-1,9-diol),...

Three angular Zn2Dy complexes showing the effect of remote coordination at Zn and counter ions on slow magnetic relaxation at Dy centres

“…The nature of magnetization curves indicates the presence of significant magnetic anisotropy and/or low-lying excited states in these systems as expected for Dy( iii ) ions. 43…”

Macrocycle supported dinuclear lanthanide complexes with different β-diketonate co-ligands displaying zero field single-molecule magnetic behaviour

“…In our previous work, 9 we observed lanthanide ion assisted in situ macrocyclization of an acyclic heptadentate N 6 O donor Schiff base ligand in the presence of co-ligands (acetylacetone or its derivative) by defragmentation of some parts of the ligands. The resulting macrocyclic ligand is similar to the Robson type macrocycle, except that alternate N-atoms are imine and amine functionalities.…”

Antiferromagnetic structure and magnetic properties of Dy2O2Te: An isostructural analog of the rare-earth superconductors R2O2Bi

“…The field-induced slow magnetic behaviors have been widely observed and investigated in single-molecule magnets [39][40][41][42] (many of them are Dy-based complexes) and inorganic compound with diluted Dy ions [43]. They are explained as a result of magnetic quantum tunneling (MQT) effect.…”

“…Besides, due to the large quantum number J, many Dy-based materials exhibit peculiar magnetic properties such as slow magnetic relaxation behavior. This behavior has been widely observed in Dy-based complex in the research of single-molecule magnet or compounds with diluted Dy ions, which arises from the magnetic quantum tunneling effect and weak interactions between molecules [39][40][41][42][43]. The occurrence of slow magnetic behavior in a correlated Dy-based compound is very rare.…”