New sandwich-type lanthanide complexes based on closed-macrocyclic Schiff base and phthalocyanine molecules

Abstract

Two new sandwich-type lanthanide complexes with the general formula [(Pc)₂Ln₃(L)(OAc)(OCH₃)₂] (Ln³⁺ = Dy³⁺ (1) and Er³⁺ (2)) were successfully synthesized and structurally characterized based on closed-macrocyclic Schiff base and phthalocyanine molecules. The magnetic properties and structure–property relationship in this multi-decker system were investigated. Interestingly, the corresponding dysprosium complex 1 shows typical single-molecule magnetic behavior with ferromagnetic dipole–dipole interactions and the slow relaxation of magnetization.