Structural Investigation of Flexible 1,4-Bis(1,2,4-triazol-1-ylmethyl)benzene Ligand in Keggin-Based Polyoxometalate Frameworks
Structural Investigation of Flexible 1,4-Bis(1,2,4-triazol-1-ylmethyl)benzene Ligand in Keggin-Based Polyoxometalate Frameworks
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DOI：
10.1021/cg9000076
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发表时间：
2009-04
影响因子：
3.8
通讯作者：
Bao-xia Dong;Qiang Xu
中科院分区：
文献类型：
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作者：
Bao-xia Dong;Qiang Xu
通过引入灵活的1，4-二在水热条件下将（1，2，4-三唑-1-基甲基）苯（btx）配体引入钼酸盐体系中，获得了七种新型Keggin基骨架：[Ag（btx）]4[SiMo12O40]·2H2O（1）、[Cu（btx）]4[SiMo12O40]（2）、[Cu（btx）2]2[SiMo12O40]（3）、[Zn（btx）2]2[SiMo12O40]·0.5H2O（4）和[M2（H2O）4（btx）3][SiMo12O40]·4H2O（M = Mn、Ni和Co）（5−7）。化合物1含有0 D（零维）Keggin基片段、1D聚合物链和0 D +1D聚假轮烷基序。化合物2具有有趣的1D+2D聚-假-轮烷结构。化合物3具有3D 4-连接的金刚石相关的聚合物框架，其将Keggin多氧阴离子捕获到星状通道中。化合物4含有孤立的Keggin多氧阴离子和拉链状聚合物片段，它们是由成对的褶皱网构成的。同构化合物5 - 7具有2D→2D互穿网络结构，具有聚轮烷和聚链烷的特征。
By introducing the flexible 1,4-bis(1,2,4-triazol-1-ylmethyl)benzene (btx) ligand into the molybdate system under the hydrothermal conditions, seven novel Keggin-based frameworks were obtained: [Ag(btx)]4[SiMo12O40]·2H2O (1), [Cu(btx)]4[SiMo12O40] (2), [Cu(btx)2]2[SiMo12O40] (3), [Zn(btx)2]2[SiMo12O40]·0.5H2O (4) and [M2(H2O)4(btx)3][SiMo12O40]·4H2O (M = Mn, Ni and Co) (5−7). Compound 1 contains 0D (zero dimensional) Keggin-based fragment, 1D polymer chain and 0D+1D poly-pseudo-rotaxane motif. Compound 2 exhibits interesting 1D+2D poly-pseudo-rotaxane architecture. Compound 3 has a 3D 4-connected diamond-related polymeric framework, which entraps the Keggin polyoxoanions into the stellate channels. Compound 4 contains isolated Keggin polyoxoanions and zipperlike polymer fragments, which are constructed from pairs of crumpled nets. Isostructural compounds 5−7 exhibit 2D→2D interpenetrated network structure featuring both polyrotaxane and polycatenane characters.