Huang You-gui, Wu Ben-lai, Yuan Da-qiang, Xu Yan-qing, Jiang Fei-long, Hong Mao-chun
State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China.
Inorg Chem. 2007 Feb 19;46(4):1171-6. doi: 10.1021/ic0615271.
A series of new lanthanide hybrids [Ln3(mu-OH)4 (2,5-pydc)(2,5-Hpydc)3(H2O)4]n (Ln = Gd (1), Dy (2), Er (3), Eu (4), Sm (5), Yb (6), Y (7); 2,5-pydc=pyridine-2,5-dicarboxylate), as clustered lanthanide oxide ring tunnels with helical dodecahedral chains and fully 3D Ln-O-Ln connectivity, has been hydrothermally synthesized and characterized. The inorganic skeleton of the hybrid can be specified by the Schläfli symbol (6210)2 (64102) as a single 3D (3,4)-connected net. The luminescence properties have been studied, and the results showed that the Dy(III) (2) and Eu(III) (4) complexes exhibited sensitized luminescence in the visible region. Variable-temperature magnetic susceptibility measurements of 1-6 showed that the complexes 1-3 are nearly paramagnets, whereas the depopulation of the Stark levels in complexes 4-6 leads to a continuous decrease in mu(eff) when the sample is cooled from 300 to 2 K.
一系列新的镧系杂化物[Ln3(μ-OH)4(2,5-pydc)(2,5-Hpydc)3(H2O)4]n（Ln = Gd (1)、Dy (2)、Er (3)、Eu (4)、Sm (5)、Yb (6)、Y (7)；2,5-pydc = 吡啶-2,5-二羧酸酯）已通过水热法合成并表征，它们是具有螺旋十二面体链和完全三维Ln-O-Ln连接性的簇状氧化镧环隧道。该杂化物的无机骨架可以用施莱夫利符号(6210)2(64102)指定为单一的三维(3,4)-连接网络。研究了其发光性质，结果表明Dy(III) (2)和Eu(III) (4)配合物在可见光区域表现出敏化发光。对1-6进行的变温磁化率测量表明，配合物1-3几乎是顺磁体，而当样品从300 K冷却到2 K时，配合物4-6中斯塔克能级的去填充导致μ(eff)持续下降。
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