Synthesis, Structures, Physical Properties, and Functions of Magnetic Materials

超分子技术，如主客体络合物的形成，已经被用来调节分子基磁性材料。我们已经开发出了几种具有纳米尺寸的孔或空穴的磁性材料，它们的磁性可以通过包裹小的抗磁性分子来改变。一些磁性材料表现出光致磁性。我们还开发了含有3d和4f金属离子的单分子磁体。1)制备了具有手性晶格的弱铁磁体，并用偏振中子衍射法对其磁结构进行了表征。2)在[M(Pm)(N_3)_2](M=Mn，Fe，Co，合成了蜂窝状多孔化合物[Cu(4APM)(OCH_3)(NO_3)]，并在相对稀有的R-3.6空间群中对其晶体结构进行了解析。[Dy_4Cu]和[Tb_4Cu]表现为单分子磁体。

Supramolecular techniques such as host-guest complex formation have been used to tune molecule-based magnetic materials. We have developed several magnetic materials possessing nano-sized pores or cavities, whose magnetic properties were changed by inclusion of small diamagnetic molecules. Some magnetic materials exhibited photo-induced magnetism. We also developed single-molecule magnets containing 3d-and 4f-metal ions. Several results from this project are listed below :1)Weak ferromagnet possessing a chiral lattice was prepared and their magnetic structure was characterized by means of polarized neutron diffraction study.2)Photo-induced magnetism was found in [M(pm)(N_3)_2](M=Mn,Fe,Co,Ni).3)Diamagnetic-ion inclusion was applied for the magnetic coupling switch in the nickel(II) complex having a polyether side-arm.4)Crown-ether spin label reagents were developed.5)Honeycomb-like porous compound [Cu(4APM)(OCH_3)(NO_3)] was prepared and the crystal structure was solved in a relatively rare space group R-3.6)The high-spin ground state was characterized for the hybrid metal-radical solid [Ni(4ImNNH)_2(NO_3)_2].7)The lanthanide-containing complexes [DyCuDy],[Dy_4Cu], and [Tb_4Cu] behaved as single-molecule magnets.