Synthesis, Crystal Structure and Magnetic Properties of Dinuclear Dy(III) Complex Based on Multidentate Schiff Base

A new Dy-2 complex [Dy-2(L)(2)(acac)(2)(CH3CH2OH)(2)] (1) has been synthesized based on a multidentate Schiff base H2L (H2L=N'-(2- hydroxynaphthalen-1-ylmethylene)-2-(hydroxyimino)propanehydrazide) and beta-diketone co-ligand Hacac (Hacac=acetylacetone). Complex 1 was characterized by single-crystal X-ray diffraction, elemental analysis and further investigated by magnetic measurements. Structural analysis reveals that complex 1 is a centrosymmetric dinuclear dysprosium complex and the asymmetric unit contains a Dy(III) ion, one L-2(-) ligand, one acac(-) co-ligand, and an ethanol molecule. Each of the DAP centers is eight-coordinate and adopts a distorted bicapped trigonal-prismatic coordination geometry. Magnetic, studies suggest the existence of weak aniiferromagnetic interactions between the DOJO ions in 1. In addition, the slow magnetic relaxation behaviors are observed in 1 with the magnetic energy barrier Delta E/k(B)=14.52 K and the pre-exponential factor tau(0) =7.58x10(-6) s.