The invention belongs to the technical field of
rare earth metal coordination
chemistry, and relates to a mononuclear
dysprosium magnetic complex with a simple
structural formula of Dy(TPA)(OPhCl2NO2)3, wherein TPA is
tris(2-pyridylmethyl)amine, and HOPhCl2NO2 is 2, 6-dichloro-4-
nitrophenol. The preparation method comprises the following steps: adding
triethylamine into an
acetonitrile solution containing 2, 6-dichloro-4-
nitrophenol (HOPhCl2NO2), performing uniform stirring, adding the mixture into
anhydrous alcohol containing
dysprosium chloride hexahydrate (DyCl3.6H2O) and TPA, performing full reacting, completely dissolving the generated yellow precipitate into
dichloromethane, slowly adding n-
hexane, standing, and carrying out two-
phase diffusion to obtain the seven-coordination mononuclear
dysprosium complex. The preparation process is safe, simple, high in
controllability and good in reproducibility, and the prepared complex is good in stability and high in purity and yield. Typical slow relaxation behaviors can be shown under an external
magnetic field of 0.15 T, and the magnetic material has the characteristics of a single-molecule
magnet and can be used as a molecular-based magnetic material in novel high-density
information storage equipment (such as an optical disk and a hard disk).