Assembly of Polyoxometalate-Based Metal鈥揙rganic Frameworks with Silver(I)-Schiff Base Coordination Polymeric Chains as Building Blocks

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• 作者：Dongbin Dang ; Yanning Zheng ; Yan Bai ; Xiangyang Guo ; Pengtao Ma ; Jingyang Niu
• 刊名：Crystal Growth & Design
• 出版年：2012
• 出版时间：August 1, 2012
• 年：2012
• 卷：12
• 期：8
• 页码：3856-3867
• 全文大小：896K
• 年卷期：v.12,no.8(August 1, 2012)
• ISSN：1528-7505

文摘

Six crystalline polyoxometalate-based three-dimensional (3D) metal鈥搊rganic frameworks {[AgL⁴(DMF)][AgL⁴]₂(PMo₁₂O₄₀)路DMF路3H₂O}_n (1), {[AgL⁴]₃(PW₁₂O₄₀)路6H₂O}_n (2), {[AgL⁵]₃(PMo₁₂O₄₀)路(CH₃CN)₃}_n (3), {[AgL⁵(PW₁₂O₄₀)][AgL⁵(H₂O)_0.25(MeOH)_0.25)][AgL⁵]_0.5路DMF路(H₂O)_1.5}_n (4), {[AgL⁶]₃(PMo₁₂O₄₀)路DMF路H₂O}_n (5), and {[AgL⁷]₃(PMo₁₂O₄₀)路DMF路(CH₃CN)₃}_n (6) have been successfully synthesized based on one-dimensional (1D) coordination polymers constructed by the coordination of polydentate Schiff-base ligands and silver cations and saturated 伪-Keggin polyoxoanion [PM₁₂O₄₀]^{3鈥?/sup> (M = W, Mo) as building blocks, where L4, L5, L6, and L7 are 2,5-bis(3-pyridyl)-3,4-diaza-2,4-hexadiene, 1,4-bis(3-pyridyl)-2,3-diaza-1,3-butadiene, 2,5-bis(4-pyridyl)-3,4-diaza-2,4-hexadiene, and 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene, respectively. Compounds 1鈥?b>6 are structurally characterized by elemental analyses, IR spectroscopy, thermogravimetric analyses (TG), powder X-ray diffraction (XRD), and complete single-crystal X-ray diffraction analyses. The structures of 1鈥?b>6 exhibit 3D supramolecular networks formed by linking 1D Ag-Schiff base chains and 伪-Keggin polyoxoanion units through the cooperativity of multiform supramolecular interactions, such as intermolecular Ag路路路O weak interactions, Ag路路路蟺 interactions, 蟺路路路蟺 interactions, and hydrogen bonds. The photoluminescent properties of 1鈥?b>6 have been investigated in the solid state.}