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首页> 外文期刊>Crystal growth & design >Assembly of Polyoxometalate-Based Hybrids with Different Helical Channels upon Subtle Ligand Variation
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Assembly of Polyoxometalate-Based Hybrids with Different Helical Channels upon Subtle Ligand Variation

机译：基于微配体变化的具有不同螺旋通道的多金属氧酸盐基杂化物的组装

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Self-assembly of multiple components into well-defined and predictable structures remains one of the foremost challenges in chemistry. Here, upon subtle ligand variation, we reported on the assembly of three new polyoxometalate-based organic?inorganic hybrid compounds with different helical channel, [Ag_3(H_2pyttz-I)_2][PMo_(12)O_(40)] (1), [Ag_6(H_2pyttz-II)_4][CoW_(12)O_(40)]·2H_2O(2), and [Ag_7(Hpyttz-II)_3(H_2pyttz-II)][GeW_(12)O_(40)]·7H_2O (3) (H_2pyttz-I/II = 4-/ 3-pyrid-5-(~1H-1,2,4-triazol-3-yl)-1,2,4-triazolyl, POM = polyoxometalates). X-ray diffraction analysis shows that compound 1 is constructed by “butterfly-like” Ag_5(H_2pyttz-I)_2 subunits and POMs clusters, which are assembled into close helical channels impregnated with the components selves. Both compounds 2 and 3 are constructed by “paddle-wheel like” Ag_4(H_2pyttz-II)_4 motifs and POMs clusters, which bring into being the larger helical channels (10.5% and 12.5% of the cell volume, respectively). Note that the only difference in compounds 2 and 3 is that the former contains 1D metal?organic chain structure, and the latter contains 2D metal?organic layer structure. In addition, the photocatalytic degradation of RhB by these compounds was also investigated.
机译：将多种成分自组装为定义明确且可预测的结构仍然是化学领域最重要的挑战之一。在这里，通过细微的配体变化，我们报道了三种具有不同螺旋通道的新的基于多金属氧酸盐的有机-无机杂化化合物的组装，[Ag_3（H_2pyttz-I）_2] [PMo_（12）O_（40）]（1） ，[Ag_6（H_2pyttz-II）_4] [CoW_（12）O_（40）]·2H_2O（2）和[Ag_7（Hpyttz-II）_3（H_2pyttz-II）] [GeW_（12）O_（40） ]·7H_2O（3）（H_2pyttz-I / II = 4- / 3-pyrid-5-（〜1H-1,2,4-三唑-3-基）-1,2,4-三唑基，POM =多金属氧酸盐）。 X射线衍射分析表明，化合物1是由“蝴蝶状” Ag_5（H_2pyttz-I）_2亚基和POM簇构成的，这些簇被组装成浸渍了组分自身的紧密螺旋通道。化合物2和3均由“类似桨叶”的Ag_4（H_2pyttz-II）_4图案和POM簇构成，它们形成较大的螺旋通道（分别占细胞体积的10.5％和12.5％）。注意化合物2和3的唯一区别是前者包含一维金属有机链结构，而后者包含二维金属有机层结构。此外，还研究了这些化合物对RhB的光催化降解。

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