A Dy(III) Fluorescent Single-Molecule Magnet Based on a Rhodamine 6G Ligand

The complexes of lanthanide metals, especially dysprosium, can generally exhibit excellent magnetic properties. By means modifying ligands, dual functions or even multi-functions be achieved. Here, we synthesized an eight-coordinate Dy(III) complex 1, [Dy(HL-o)2(MeOH)2](ClO4)3·4.5MeOH, which is single-molecule magnet (SMM), and the introduction rhodamine 6G chromophore in ring-opened ligand HL-o realizes ligand-centered fluorescence addition to SMM. Magnetic measurements ab initio calculations indicate that relaxation for 1 should due Raman process. Studies on magneto-structural correlationship salicylaldehyde hydrazone show calculated energy first Kramers Doublet (EKD1) basically related Ophenoxy-Dy-Ophenoxy bond angle, i.e., larger angle corresponds a EKD1.