Hydrothermal Synthesis, Structures and Magnetic Studies of Transition Metal Sulfates Containing Hydrazine

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• 作者：Li-Hui Jia ; Ru-Yin Li ; Zhi-Ming Duan ; Shang-Da Jiang ; Bing-Wu Wang ; Zhe-Ming Wang ; Song Gao
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：January 3, 2011
• 年：2011
• 卷：50
• 期：1
• 页码：144-154
• 全文大小：1096K
• 年卷期：v.50,no.1(January 3, 2011)
• ISSN：1520-510X

文摘

By employing hydrothermal method, six transition metal sulfates containing hydrazine (N₂H₄) have been obtained: [M(SO₄)₂(N₂H₅)₂]_n (M = Mn(1), Co(2), Ni(3)) and [M(N₂H₄)SO₄]_n (M = Mn(4), Co(5), Ni(6)). Their crystal structures and magnetic properties have been investigated experimentally and theoretically. Compounds 1鈭?b>3 consist of one-dimensional sulfate bridged homometallic chains with protonated hydrazine molecule as terminal ligand, and compounds 4鈭?b>6 are hydrazing-sulfate mixed bridged homometallic three-dimensional frameworks. Compounds 1鈭?b>6 exhibit antiferromagnetic coupling between M²⁺ ions, but their magnetic properties differ at low temperatures because of the different single-ion anisotropy and crystal structures. The magnetostructural correlations and the magnetic coupling mechanism are analyzed by density functional theory calculations (DFT).