Metal Monophosphonates M{(2-C5H4NO)CH2PO3}(H2O)2 (M = Co, Ni, Mn, Cd): Synthesis, Structure, and Magnetism

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• 作者：Ting-Hai Yang ; Elisabeth S. Knowles ; Daniel M. Pajerowski ; Jian-Sheng Xia ; Liang Yin ; Song Gao ; Mark W. Meisel ; Li-Min Zheng
• 刊名：Inorganic Chemistry
• 出版年：2010
• 出版时间：September 20, 2010
• 年：2010
• 卷：49
• 期：18
• 页码：8474-8480
• 全文大小：955K
• 年卷期：v.49,no.18(September 20, 2010)
• ISSN：1520-510X

文摘

Four isostructural metal monophosphonates, M{(2-C₅H₄NO)CH₂PO₃}(H₂O)₂ with M = Co (1), Ni (2), Mn (3), and Cd (4), were synthesized and structurally characterized. These compounds show a double-chain structure in which the M₂(μ-O)₂ dimers are connected by O−P−O bridges. The magnetic responses of 1−3 were investigated over a wide range of magnetic fields (up to 10 T) and temperatures (down to 50 mK). Except for 4, which is weakly diamagnetic from 2 K to room temperature, the dominant magnetic interactions are antiferromagnetic. Isothermal magnetic field sweeps at 50 mK provide signatures in the magnetic responses that are associated with antiferromagnetic to field-induced fully polarized (magnetically saturated) transitions. Analysis of the magnetic data indicates that 1 and 2 form magnetic dimer-like clusters with weak dimer−dimer interactions present. Contrastingly, the magnetic interactions present in 3 are significantly weaker, so a definitive description of the magnetism of this compound is elusive.