Homochiral mononuclear Dy-Schiff base complexes showing field-induced double magnetic relaxation processes

Abstract

A pair of enantiopure mononuclear dysprosium/salen-type complexes (Et₃NH)[Dy((R,R)/(S,S)-3-NO₂salcy)₂] (1R/1S), where 3-NO₂salcyH₂ represents N,N′-(1,2-cyclohexanediylethylene)bis(3-nitrosalicylideneiminato), are reported. The enantiomer contains two crystallographically independent dysprosium(III) ions, each chelated by two enantiopure 3-NO₂salcy²⁻ ligands forming a [DyN₄O₄] core. Detailed magnetic studies on compound 1R reveal a field-induced dual magnetic relaxation behavior, originating from single ion anisotropy and intermolecular interactions, respectively.