Field-induced single molecule magnet behavior of a three-dimensional Dy(III)-based complex

Abstract

A novel three-dimensional Dy(III)-based complex [Dy(H2-DHBDC)0.5(DHBDC)0.5(C2H5OH)(H2O)]n·H2O (H4-DHBDC = 2,5-dihydroxy-1,4-terephthalic acid) (1) was fabricated using a hydrothermal method. Such complex was examined by single-crystal X-ray diffraction analysis and then characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis, powder X-ray diffraction as well as magnetic properties. The results of single-crystal structure analysis suggested that complex 1 consisted of three-dimensional framework structure and crystallized in the monoclinic system, space group P21/c. The DyIII ion in 1 adopted eight-coordination mode with a triangular dodecahedron. The results of magnetic property investigations suggested that the coordination polymer exhibited slow magnetic relaxation behaviors under 1500 Oe dc field. Furthermore, the frequency dependence of out-of phase (χ″) ac signals for complex 1 displayed two maxima at low temperature, indicating the presence of two relaxation processes.