镧系双核簇的金属有机框架呈现缓慢的磁弛豫。
Metal-Organic Framework of Lanthanoid Dinuclear Clusters Undergoes Slow Magnetic Relaxation.
作者信息
Iwami Hikaru, Nakanishi Ryo, Horii Yoji, Katoh Keiichi, Breedlove Brian K, Yamashita Masahiro
机构信息
Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aza-Aoba, Aoba-ku, Sendai, Miyagi 980-8578, Japan.
WPI Research Center, Advanced Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.
出版信息
Materials (Basel). 2017 Jan 20;10(1):81. doi: 10.3390/ma10010081.
Lanthanoid metal-organic frameworks (Ln-MOFs) can adopt a variety of new structures due to the large coordination numbers of Ln metal ions, and Ln-MOFs are expected to show new luminescence and magnetic properties due to the localized electrons. In particular, some Ln metal ions, such as Dy(III) and Tb(III) ions, work as isolated quantum magnets when they have magnetic anisotropy. In this work, using 4,4',4″-s-triazine-2,4,6-triyl-tribenzoic acid (H₃TATB) as a ligand, two new Ln-MOFs, [Dy(TATB)(DMF)₂] () and [Tb(TATB)(DMF)₂] (), were obtained. The Ln-MOFs contain Ln dinuclear clusters as secondary building units, and underwent slow magnetic relaxation similar to single-molecule magnets.
镧系金属有机框架（Ln-MOFs）由于Ln金属离子的高配位数而能够呈现出多种新结构，并且由于局域电子，Ln-MOFs有望展现出新的发光和磁性。特别地，一些Ln金属离子，如Dy(III)和Tb(III)离子，当它们具有磁各向异性时可作为孤立量子磁体。在本工作中，以4,4',4″-均三嗪-2,4,6-三苯甲酸（H₃TATB）作为配体，获得了两种新型Ln-MOFs，即[Dy(TATB)(DMF)₂]（ ）和[Tb(TATB)(DMF)₂]（ ）。这些Ln-MOFs包含Ln双核簇作为二级结构单元，并且 表现出类似于单分子磁体的慢磁弛豫。
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