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

磁性材料的合成、结构、物理性质和功能

基本信息

批准号：
15550115
负责人：
NOGAMI Takashi
金额：
$ 2.43万
依托单位：
The University of Electro-Communications
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

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.

超分子技术，如主体-客体复合物的形成已被用于调整分子基磁性材料。我们已经开发了几种具有纳米尺寸孔或腔的磁性材料，其磁性通过包含小的抗磁性分子而改变。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。该项目的若干成果如下：1）制备了具有手征晶格的弱铁磁体，并利用极化中子衍射研究了其磁结构。2）在[M（pm）（N_3）_2]中发现了光致磁性。（M=Mn，Fe，Co，4）合成了冠醚类自旋标记物[Cu（4APM）（OCH_3）（NO_3）]，并在R-3空间群进行了结构解析; 6）对金属自由基杂化固体[Ni（4 ImNNH）_2（NO_3）_2]的高自旋基态进行了表征; 7）合成了稀土-Cu（4APM）（OCH_3）（NO_3）_2-Cu（4APM）（NO_3）-Cu（4APM）（OCH_3）（NO_3）-Ni（4APM）（NO_3）（NO含[DyCuDy]、[Dy_4Cu]和[Tb_4Cu]的配合物表现为单分子磁体。