Two dysprosium single molecule magnets with planar skeleton built from edge-shared Dy3 triangles

Abstract

Two dysprosium clusters [Dy4(µ3-OH)2(L1)6(L2)2]·2CH3CN (1) and [Dy6(µ3-OH)2(L3)2(HL3)2(H2L3)2(EtOH)2Cl2]Cl2·2EtOH·4CH3CN (2) bearing in-situ formed Schiff base ligands (H2L2 and H3L3) were obtained from the solvothermal reactions of Dy(NO3)3∙5H2O with 8-hydroxyquinoline-2-carboxaldehyde and anthranilic acid (HL1), and DyCl3∙6H2O with 5-bromo-2-hydroxybenzaldehyde and 2-methyl-2-amino-1,3-propanediol, respectively. They present planar tetranuclear and hexanuclear skeletons constructed from two and four edge-shared triangular Dy3 units for 1 and 2, respectively. Magnetic tests showed that both titled dysprosium clusters are field-induced single molecule magnets. Ab initio calculations were also performed to interpret their SMM performances. Single molecule magnets bearing such planar skeletons are rarely reported.