Synthesis and Characterization of Three New Layered Vanadium Tellurites, MVTe2O8 (M = Al, Ga, and Mn): Three-Dimensional (3-D) Antiferromagnetic Behavior of MnVTe2O8 with a Zigzag S = 2 Spin Chain

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• 作者：Su-whan Bae ; Jisun Yoo ; Suheon Lee ; Kwang Yong Choi ; Kang Min Ok
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：February 1, 2016
• 年：2016
• 卷：55
• 期：3
• 页码：1347-1353
• 全文大小：476K
• ISSN：1520-510X

文摘

Three new metal vanadium tellurites, MVTe₂O₈ (M = Al, Ga, and Mn) have been synthesized through standard solid-state and hydrothermal reactions. Crystal structure analyses using X-ray diffraction reveal that the isostructural materials exhibit layered structures consisting of MO₆, TeO₄, and VO₄ polyhedra. The corner-sharing of MO₆ octahedra results in one-dimensional (1-D) zigzag chains that are further interconnected by tetrameric Te₄O₁₂ units and the VO₄ tetrahedra to complete a layered structure. Detailed structural analysis suggests that the unit-cell volumes and the very long Te(2)–O(2) bond distances in MVTe₂O₈ are closely related to the ionic radii of M³⁺ cations. Additional characterizations such as ultraviolet–visible light (UV-vis) and infrared spectroscopies, thermogravimetric analyses, and electron paramagnetic resonance measurements were performed. The temperature-dependent magnetic susceptibility measurements on MnVTe₂O₈ suggest that the material behaves like a three-dimensional (3-D) antiferromagnet with T_N = 30 K, although the structure consists of a zigzag S = 2 spin chain.