Assembly of Polyoxometalate-Based Hybrids with Different Helical Channels upon Subtle Ligand Variation

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• 作者：Meng-Ting Li ; Jing-Quan Sha ; Xi-Ming Zong ; Jing-Wen Sun ; Peng-Fei Yan ; Liang Li ; Xiao-Ning Yang
• 刊名：Crystal Growth & Design
• 出版年：2014
• 出版时间：June 4, 2014
• 年：2014
• 卷：14
• 期：6
• 页码：2794-2802
• 全文大小：755K
• 年卷期：v.14,no.6(June 4, 2014)
• ISSN：1528-7505

文摘

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鈥搃norganic hybrid compounds with different helical channel, [Ag₃(H₂pyttz-I)₂][PMo₁₂O₄₀] (1), [Ag₆(H₂pyttz-II)₄][CoW₁₂O₄₀]路2H₂O (2), and [Ag₇(Hpyttz-II)₃(H₂pyttz-II)][GeW₁₂O₄₀]路7H₂O (3) (H₂pyttz-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 鈥渂utterfly-like鈥?Ag₅(H₂pyttz-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 鈥減addle-wheel like鈥?Ag₄(H₂pyttz-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鈥搊rganic chain structure, and the latter contains 2D metal鈥搊rganic layer structure. In addition, the photocatalytic degradation of RhB by these compounds was also investigated.