Dodecanuclear, icosanuclear and octanuclear porous MOF-like POM materials [Mo^V₁₂O₁₂(μ₂-O)₄(μ₃-O)₁₂(Htrz)₄(trz)₄]·nH₂O (n = 22, 1; n = 92, 2; Htrz = 1H-1,2,3-triazole), [Mo^V₈O₈(μ₂-O)₁₂(Htrz)₈]_½·[Mo^V₁₂O₁₂(μ₂-O)₄(μ₃-O)₁₂(Htrz)₄(trz)₄]·44H₂O (3), and [Mo^V₈O₈(μ₂-O)₁₂(Htrz)₈]·62H₂O (4) have been obtained and well characterized. Higher Mo₁₂ agglomerates have been fabricated in acidic solution, while isolated Mo₈ species formed in weak alkaline conditions. Fortuitously, their additive 3 is precipitated in a neutral environment. Structural analyses indicate that there are diversiform pores present in 1–4, which are formed by polyoxometalates (POMs) themselves and intermolecular accumulations, or even induced by free disordered water molecules. Obvious downfield shifts have been found in the solid ¹³C NMR spectra for the coordinated 1,2,3-triazoles in 1 and 2. In particular, isolated single species of polyoxometalate-based porous framework POMOF 4 can be identified in the solution ¹³C NMR spectrum and further supported by solid and solution UV-vis spectroscopy. Moreover, gas adsorption tests indicate that 1 is the most promising CO₂ adsorbent of these four materials, compared with other common gases O₂, H₂, CH₄ and N₂ under different pressures. The peculiarities of this sort of POMOFs, as well as the relationships and interactions with gases, have been discussed.

中文翻译：

---

用于选择性吸附气体的分离的钼基微孔 POM

十二核、二十核和八核多孔类MOF POM材料[Mo ^V ₁₂ O ₁₂ (μ ₂ -O) ₄ (μ ₃ -O) ₁₂ (Htrz) ₄ (trz) ₄ ]· n H ₂ O ( n = 22, 1 ; n = 92, 2 ; Htrz = 1 H -1,2,3-三唑), [Mo ^V ₈ O ₈ (μ ₂ -O) ₁₂ (Htrz) ₈ ] _½ ·[Mo ^V ₁₂ O ₁₂ (μ₂ -O) ₄ (μ ₃ -O) ₁₂ (Htrz) ₄ (trz) ₄ ]·44H ₂ O ( 3 ), [Mo ^V ₈ O ₈ (μ ₂ -O) ₁₂ (Htrz) ₈ ]·62H已获得₂ O ( 4 ) 并对其进行了很好的表征。在酸性溶液中制备了较高的 Mo ₁₂团聚体，而在弱碱性条件下形成了_{孤立的 Mo 8物种。}幸运的是，他们的添加剂3在中性环境中沉淀。结构分析表明，1~ 4中存在多种孔隙，这些孔隙是由多金属氧酸盐（POMs）本身和分子间积累形成的，甚至是由游离的无序水分子诱导形成的。在1和2中配位的 1,2,3-三唑的固体¹³ C NMR 光谱中发现了明显的低场位移。特别是，可以在溶液¹³ C NMR 光谱中鉴定分离的单一种类的基于多金属氧酸盐的多孔骨架 POMOF 4，并进一步得到固体和溶液 UV-vis 光谱的支持。此外，气体吸附试验表明1是最有希望的 CO_{这四种材料的2}吸附剂，在不同压力下与其他常见气体O ₂、H ₂、CH ₄和N _2相比。已经讨论了这种 POMOF 的特性，以及与气体的关系和相互作用。