Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, Shanghai, 200062, China.
Dalton Trans. 2012 Feb 21;41(7):2026-33. doi: 10.1039/c1dt11692d. Epub 2011 Dec 19.
Two novel Mn(II) coordination polymers with azide and 4-(4-pyridyl)benzoic acid N-oxide (4,4-Hopybz) were synthesized and structurally and magnetically characterized. They are formulated as {[Mn(2)(4,4-opybz)(2)(N(3))(2)(H(2)O)(2)]·H(2)O}(n) (1) and {Mn(4)(4,4-opybz)(5)(N(3))(H(2)O)(8)(2)·2H(2)O}(n) (2). Compound 1 contains 2D coordination layers in which the infinite Mn(II) chains with alternating (μ-EO-N(3))(2)(μ-COO) (EO = end-on) and (μ-COO)(μ-O) bridges are interlinked by the backbones of the organic ligands. Compound 2 is a 3D metal-organic framework in which the unique linear tetranuclear clusters with (μ-EO-N(3))(μ-COO) and (μ-COO)(μ-O) bridges are cross-linked by organic backbones, and it represents a new example of the rare 8-connected self-catenated 3D net with the point symbol 4(16)·6(12). Magnetic analyses on the compounds have been performed in the classical-spin approximation, revealing that all the above-mentioned mixed bridging motifs induce weak antiferromagnetic interactions between Mn(II) ions.
两个含有叠氮和 4-(4-吡啶基)苯甲酸 N-氧化物（4,4-Hopybz）的新型 Mn(II)配位聚合物被合成并进行了结构和磁性表征。它们的化学式分别为{[Mn(2)(4,4-opybz)(2)(N(3))(2)(H(2)O)(2)]·H(2)O}(n) (1) 和 {Mn(4)(4,4-opybz)(5)(N(3))(H(2)O)(8)(2)·2H(2)O}(n) (2)。化合物 1 包含二维配位层，其中无限的 Mn(II)链通过交替的 (μ-EO-N(3))(2)(μ-COO)（EO = 端对端）和 (μ-COO)(μ-O)桥与有机配体的骨架相互连接。化合物 2 是一个三维金属有机骨架，其中具有独特的线性四核簇通过 (μ-EO-N(3))(μ-COO)和 (μ-COO)(μ-O)桥相互交联，并且它代表了具有点符号 4(16)·6(12)的罕见的 8 连接自交联 3D 网络的新实例。对化合物的磁性分析在经典自旋近似下进行，表明所有上述混合桥联基元诱导 Mn(II)离子之间的弱反铁磁相互作用。
