Phenoxo-O bridged dinuclear lanthanide complexes based on a multitooth Schiff base ligand: Structures, fluorescence properties and single-molecule magnet behavior

• Two phenoxo-O bridged dinuclear complexes have been synthesized and structurally characterized.
• Magnetic measurements indicated that slow relaxation of the magnetization was clearly observed in 2.
• Complexes 1 and 2 exhibit characteristic TbIII and DyIII centered luminescence.

Two Ln(III) complexes, [Tb(dbm)L(CH3)2CHOH]2·4(CH3)2CHOH (1) and [Dy(dbm)L(CH3)2CHOH]2 (2) (dbm = 1,3-diphenyl-1,3-propanedione, HL = N-(methylene-8-hydroxyquinoline)-2-furohydrazide), have been synthesized, structurally and magnetically characterized. Both 1 and 2 are phenoxo-O bridged binuclear complexes, in which Ln1 and Ln1a are in an eight-coordinated environment bridged by two phenoxido oxygen atoms of two 8-hydroxyquinoline Schiff-base ligands. Magnetic studies reveal that 2 demonstrates single-molecule magnet behavior. In addition, the luminescence properties of 1 and 2 were studied.

Figure optionsDownload as PowerPoint slide