Dysprosium organic phosphonic acid having a single molecule fluorescence behavior and magnetic fine structure of the complex

The present invention is an organic acid having dysprosium complex single molecule fluorescence behavior and magnetic fine structure, comprising an organic phosphonic acid dianion notpH4, dysprosium ion, a perchlorate anion and water molecules, it has a layered structure, each of the dysprosium ion between connected by O-P-O-bridge, the metal ion has seven coordinate oxygen atoms, having a pentagonal bipyramid D5h symmetry structure, wherein the ligand structure notpH6 formula: Advantages: ac susceptibility real and imaginary portion frequency-dependent characteristics, a single molecule magnet slow relaxation behavior, the energy barrier fitted Arrhenius equation is: 41 K (τ0 = 9.6 × 10-10 s ); to give the characteristic fluorescence of rare earth emission at a particular wavelength excitation, fluorescence 4F9 / 2 to 6H15 / 2 characterizing the fine structure, resulting 6H15 / 2Stark alkylene energy levels of the ground state, and the magnetic test results associated with fluorescent rare earth monomolecular magnet.