镍–稀土单分子磁体的研究进展

Research Progress in Ni-Ln SMMs Single Molecule Magnets

镍(II)离子具有3d8的电子构型。在八面体场中,它们倾向于采用高自旋,表现为顺磁性,而在正方形平面场中,它们通常采用低自旋,表现为抗磁性。镍(II)可以与具有f7-f11电子构型的镧系离子进行铁磁耦合,如镝(III)。镍(II)离子内的二阶轨道角动量可以提供大量的零场分裂参数,这意味着可能存在显著的磁各向异性。因此,本文通过对近年来典型的镍–稀土单分子磁体进行综述,以期为3d-4f单分子磁体的发展奠定一定的基础。Nickel(II) ions possess electronic configuration of 3d8. In an octahedral field, they tend to adopt a high-spin, exhibiting paramagnetism, whereas in a square-planar field, they typically adopt a low- spin, manifesting as diamagnetism. Ni(II)can engage in ferromagnetic coupling with lanthanide ions having electronic configurations of f7-f11, such as dysprosium(III). Additionally, the second-order orbital angular momentum within Nickel(II) ions can provide substantial zero-field splitting parameters, implying the potential for significant magnetic anisotropy. Therefore, this paper reviews the typical nickel-rare earth single molecule magnets in recent years, in order to lay a certain foundation for the development of 3d-4f single molecule magnets.