Syntheses and Characterization of a Family of Vanadate Compounds Ba3M(V2O7)2 (M = Co, Mn, Mg, or Zn) with an Edge-Shared [M2O10] Dimer Structure
Syntheses and Characterization of a Family of Vanadate Compounds Ba3M(V2O7)2 (M = Co, Mn, Mg, or Zn) with an Edge-Shared [M2O10] Dimer Structure
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具有共享边缘 [M2O10] 二聚体结构的钒酸盐化合物 Ba3M(V2O7)2（M = Co、Mn、Mg 或 Zn）族的合成和表征
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发表时间：
2015
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通讯作者：
Ming Yang
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作者：
Nannan Wang;Zhangzhen He;M. Cui;Wen;Suyun Zhang;Ming Yang
通过传统的高温固相反应合成了一系列钒酸盐化合物Ba3M(V2O7)2（M = Co、Mn、Mg或Zn）。发现四种化合物表现出相似的结构，均在空间群 P21/c 的单斜晶系中结晶。 V5+ 离子呈四面体配位，形成共享角的 (V2O7)4– 基团，而 M2+ 离子呈八面体配位，形成共享边缘的 [M2O10] 二聚体。由[M2O10]二聚体和(V2O7)4-基团组成的孤立的{M2V8O28}∞簇形成沿着a轴延伸的伪一维链。磁测量证实Ba3Co(V2O7)2和Ba3Mn(V2O7)2在系统中表现出反铁磁相互作用交换，而发光测量证实Ba3Mg(V2O7)2和Ba3Zn(V2O7)2在室温256 nm UV照射下具有400至650 nm的宽发射带。
A series of vanadate compounds Ba3M(V2O7)2 (M = Co, Mn, Mg, or Zn) are synthesized by a conventional high-temperature solid-state reaction. Four compounds are found to exhibit a similar structure, which all crystallize in the monoclinic system of space group P21/c. V5+ ions are tetrahedrally coordinated, forming corner-shared (V2O7)4– groups, while M2+ ions are octahedrally coordinated, forming edge-shared [M2O10] dimers. Isolated {M2V8O28}∞ clusters composed of [M2O10] dimer and (V2O7)4– groups form a pseudo-one-dimensional chain running along the a-axis. Magnetic measurements confirm that both Ba3Co(V2O7)2 and Ba3Mn(V2O7)2 show antiferromagnetic interaction exchanges in the systems, while luminescence measurements confirm that Ba3Mg(V2O7)2 and Ba3Zn(V2O7)2 have a broad emission band from 400 to 650 nm under 256 nm UV irradiation at room temperature.