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• 作者：Weiting Yang ; Jiyang Li ; Qinhe Pan ; Zhao Jin ; Jihong Yu ; Ruren Xu
• 刊名：Chemistry of Materials
• 出版年：2008
• 出版时间：August 12, 2008
• 年：2008
• 卷：20
• 期：15
• 页码：4900-4905
• 全文大小：350K
• 年卷期：v.20,no.15(August 12, 2008)
• ISSN：1520-5002

文摘

A new three-dimensional (3-D) open-framework vanadium (IV) borophosphate, Na₂[VB₃P₂O₁₂(OH)]·2.92H₂O (denoted as VBPO-CJ27), has been synthesized by using boric acid flux method. Single-crystal structure analysis reveals that its structure is constructed by the connection of VO₆ octahedra, PO₄ and BO₄ tetrahedra, and BO₂(OH) trigonal planes to form a 3-D anionic framework containing intersecting 8-, 12-, and 16-ring channels. Charge neutrality is achieved by Na⁺ ions, and the guest water molecules locate in the void space of the open framework. To the best of our knowledge, it is the first borophosphate with extra-large 16-ring openings. Interestingly, its structure features unprecedented 12⁸16⁶ super cavities. The compound is further characterized by SEM, powder XRD, ICP, TGA, and IR analyses. Its magnetic property and ion-exchange capacity are also studied. The magnetic measurement reveals that VBPO-CJ27 is paramagnetic. Ion-exchange studies show that Na⁺ ions can be partially exchanged by NH₄⁺ ions.