Two new 1,2,4,5-cyclohexanetetracarboxylate-bridged frameworks with metal hydroxide subunits. Synthesis, structures, magnetism and adsorption.
Two new 1,2,4,5-cyclohexanetetracarboxylate-bridged frameworks with metal hydroxide subunits. Synthesis, structures, magnetism and adsorption.
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DOI：
10.1039/c0dt01497d
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发表时间：
2011-03
影响因子：
4
通讯作者：
Yong-Cong Ou;Jing Wang;Ji-Dong Leng;Zhuo-jia Lin;M. Tong
中科院分区：
文献类型：
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作者：
Yong-Cong Ou;Jing Wang;Ji-Dong Leng;Zhuo-jia Lin;M. Tong
层状配位聚合物[Ni(3.9)Mn(1.1)(μ(3)-OH)(2)(L(I))(2)(H(2)O)(10)]·2H(2)O (1) (L(I) = 1e,2a,4a,5e-环己烷四甲酸酯)和多孔3D配位聚合物的水热合成、X射线晶体结构以及热和磁性能， [Ni(4)(μ(2)-OH)(2)(μ(6)-H(2)L(IV))(2)(pymc)(4,4'-bpy)(H(2)O)(2)](OH)·9H(2)O (2) (pymc = 2-嘧啶羧酸盐, 4,4'-bpy = 4,4'-联吡啶, L(IV) = 1e,2e,4e,5e-环己烷四甲酸酯），在本文中进行了报道。 1的结构具有堆积的分离层，每层由M(3)(μ(3)-OH)(2)链形成，M(L(I))(2)通过氢键桥接。磁性的特征是在 2.9 K 时尼尔转变为完全补偿的反铁磁体，并表明 1 是由亚铁磁性 M(3)(μ(3)-OH)(2) 链和其他两个金属原子产生的变磁体。 Complex 2 是具有 2D 通道的 3D 微孔协调框架。配合物2的1,2,4,5-环己烷四甲酸酯配体(H(4)L)的构象从L(I)(e,a,a,e)变为L(IV)(e,e,e,e)。磁性测量表明自旋倾斜反铁磁行为，吸附测量表明2 可以选择性地吸附CO(2) 气体而不是N(2) 气体。
The hydrothermal synthesis, X-ray crystal structures and thermal and magnetic properties of a layered coordination polymer, [Ni(3.9)Mn(1.1)(μ(3)-OH)(2)(L(I))(2)(H(2)O)(10)]·2H(2)O (1) (L(I) = 1e,2a,4a,5e-cyclohexanetetracarboxylate), and a porous 3D coordination polymer, [Ni(4)(μ(2)-OH)(2)(μ(6)-H(2)L(IV))(2)(pymc)(4,4'-bpy)(H(2)O)(2)](OH)·9H(2)O (2) (pymc = 2-pyrimidinecarboxylate, 4,4'-bpy = 4,4'-bipyridine, L(IV) = 1e,2e,4e,5e-cyclohexanetetracarboxylate), are reported in this paper. The structure of 1 has packed separated layers, each layer being formed of M(3)(μ(3)-OH)(2) chains bridged by M(L(I))(2)via hydrogen bonds. The magnetic properties are characterized by Néel transitions to fully compensated antiferromagnets at 2.9 K and show that 1 is a metamagnet resulting from the ferrimagnetic M(3)(μ(3)-OH)(2) chains and other two metal atoms. Complex 2 is a 3D microporous coordination framework with 2D channels. The conformation of the 1,2,4,5-cyclohexanetetracarboxylate ligands (H(4)L) of complex 2 changes from L(I) (e,a,a,e) to L(IV) (e,e,e,e). The magnetic measurement indicates spin-canted antiferromagnetic behaviour, and the adsorption measurements show that 2 can selectively adsorb CO(2) gas over N(2) gas.