New class of Preyssler-lanthanide complexes with modified and extended structures tuned by the lanthanide contraction effect.
New class of Preyssler-lanthanide complexes with modified and extended structures tuned by the lanthanide contraction effect.
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DOI：
10.1039/c1dt11448d
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发表时间：
2012-02
影响因子：
4
通讯作者：
Chao Qin;Xue‐Zhi Song;Shengqun Su;Song Dang;Jing Feng;Shu-Yan Song;Zhaomin Hao;Hong-Jie Zhang
中科院分区：
文献类型：
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作者：
Chao Qin;Xue‐Zhi Song;Shengqun Su;Song Dang;Jing Feng;Shu-Yan Song;Zhaomin Hao;Hong-Jie Zhang
一类基于Preyssler阴离子和稀土阳离子的多金属氧酸盐化合物，K(5)Na(5)[{Pr(4)(H(2)O)(12)(pydc)(4)}{Na(H(2)O)P(5)W(30)O(110)}]·46H(2)O(1，H(2)PYDC=吡啶-2，6-二羧酸)，Na(7)[{Pr(4)(H(2)O)(20)(pydc)(2)(Ac)}{Na(H(2)O)P(5)W(30)O(110)}]·23H(2)O(2)和Na(10)H(2)[{Ln(2)(H(2)O)(10)(pydc)(2)}{Na(H(2)O)P(5)W(30)O(110)}]·XH(2)O(Ln=Sm3，Eu 4，Gd 5；X=11(3)和5(X=11)，13(4))，并用元素分析和单晶X-射线衍射法进行了表征。化合物1表现出由独特的{Pr(4)}金属环和Preyssler阴离子组成的二维蜂窝层。值得注意的是，钠离子的强烈参与导致了具有一维通道的独特的三维开放结构的形成。化合物2的2D网格层是由目前已知最长的稀土金属团簇{Pr(8)}和Preyssler阴离子构成的。通过在上述反应体系中引入中间稀土离子而得到的等结构化合物3、4和5，表现出双支撑的[{Ln(2)(H(2)O)(10)(pydc)(2)}{Na(H(2)O)P(5)W(30)O(110)}](12-)多金属氧酸盐簇合物结构。本文讨论了化合物1和2的磁性以及化合物3和4的发光性质。
A family of polyoxometalate compounds based on Preyssler anions and lanthanide cations, K(5)Na(5)[{Pr(4)(H(2)O)(12)(pydc)(4)}{Na(H(2)O)P(5)W(30)O(110)}]·46H(2)O (1, H(2)pydc = pyridine-2,6-dicarboxylic acid), Na(7)[{Pr(4)(H(2)O)(20)(pydc)(2)(Ac)}{Na(H(2)O)P(5)W(30)O(110)}]·23H(2)O (2), and Na(10)H(2) [{Ln(2)(H(2)O)(10)(pydc)(2)}{Na(H(2)O)P(5)W(30)O(110)}]·XH(2)O (Ln = Sm 3, Eu 4, Gd 5; X = 11 for 3 and 5, 13 for 4), have been synthesized and characterized by elemental analysis and single crystal X-ray diffraction. Compound 1 exhibits a two-dimensional honeycomb layer which is built up from unique {Pr(4)} metallacycles and Preyssler anions. Remarkably, the strong involvement of the sodium countercations leads to the formation of a unique three-dimensional open architecture with one-dimensional channels. The 2D grid layer of compound 2 is constructed by the longest currently known rare-earth metal clusters {Pr(8)} and Preyssler anions. Isostructural compounds 3, 4, and 5, obtained by introduction of the intermediate lanthanide ions into the above reaction system, exhibit bisupporting [{Ln(2)(H(2)O)(10)(pydc)(2)}{Na(H(2)O)P(5)W(30)O(110)}](12-) polyoxometalate cluster structures. The magnetic properties of compounds 1 and 2 and the luminescent properties of compounds 3 and 4 are discussed in this paper.