Two new (3,6)-connected frameworks based on an unsymmetrical tritopic pyridyldicarboxylate ligand and Co_2 dimer: Structures, magnetic, and sorption properties

Hou L.; Liu B.; Jia L.-N.; Wei L.; Wang Y.-Y.; Shi Q.-Z.

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Two new (3,6)-connected frameworks based on an unsymmetrical tritopic pyridyldicarboxylate ligand and Co_2 dimer: Structures, magnetic, and sorption properties

机译：基于不对称三位吡啶基二羧酸酯配体和Co_2二聚体的两个新的（3,6）连接框架：结构，磁性和吸附性质

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By reacting a tritopic ligand 5-(4-carboxyphenyl)nicotinic acid (H _2cpna) with Co(NO_3)_2 under different conditions, two new three-dimensional (3D) frameworks, [Co_2(cpna) _2(H_2O)_3]·DMF·9(H_2O) (1) and [Co_4(cpna)_4(H_2O)_8] (2), have been obtained. They exhibit (3,6)-connected topological nets based on Co _2 clusters and Y-shaped trinodal cpna~(2-) linkers. 1 presents a chiral anh net with the right-handed helical channels, while 2 shows an achiral framework with a rtl topology. The whole structures of 1 and 2 are constructed from 2D achiral layers interconnected by triangular cpna ~(2-) nodes. Notably, these layers contain two heterochiral vertical and parallel 2_1 helical chains for 1 and 2, respectively, and those chains are constructed with 4-connected tetrahedral or square planar centers in their respective layers. The magnetic studies indicate that 1 and 2 show antiferromagnetic and weak ferromagnetic exchanges transmitted through μ_2-O_(water)/μ_(1,3)-carboxylate bridges and carboxylate single μ_2-O bridges between Co~(2+) ions in the Co_2 dimers, respectively. In addition, 1 displays microporous sorption for N_2 and CO_2.

机译：通过使三位配体5-（4-羧基苯基）烟酸（H _2cpna）与Co（NO_3）_2在不同条件下反应，得到了两个新的三维（3D）骨架[Co_2（cpna）_2（H_2O）_3]·已获得DMF·9（H_2O）（1）和[Co_4（cpna）_4（H_2O）_8]（2）。它们展示了基于Co _2簇和Y形三节点cpna〜（2-）接头的（3,6）连接的拓扑网。图1展示了具有右手螺旋通道的手性环网，而图2展示了具有rtl拓扑的非手性框架。 1和2的整个结构由由三角形cpna〜（2-）节点互连的2D非手性层构成。值得注意的是，这些层分别包含两条分别用于1和2的杂手性垂直和平行2_1螺旋链，这些链在其各自层中构造为具有4个连接的四面体或方形平面中心。磁性研究表明1和2显示了通过μ_2-O_（水）/μ_（1,3）-羧酸盐桥和Co_2中Co〜（2+）离子之间的单个μ_2-O桥羧酸盐传递的反铁磁和弱铁磁交换二聚体。另外，1显示出对N_2和CO_2的微孔吸附。

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《Crystal growth & design》 |2013年第2期|共7页
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Hou L.; Liu B.; Jia L.-N.; Wei L.; Wang Y.-Y.; Shi Q.-Z.;
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1. Two new (3,6)-connected frameworks based on an unsymmetrical tritopic pyridyldicarboxylate ligand and Co_2 dimer: Structures, magnetic, and sorption properties [J] . Hou L., Liu B., Jia L.-N., Crystal growth & design . 2013,第2期

机译：基于不对称三位吡啶基二羧酸酯配体和Co_2二聚体的两个新的（3,6）连接框架：结构，磁性和吸附性质
2. Two Coordination Polymers based on a Flexible Tritopic Pyridyldicarboxylate Ligand: Structures and Magnetic Properties [J] . Liu Yong-Liang, Chen Feng-Ying, Di Yan-Qing, Zeitschrift fur Anorganische und Allgemeine Chemie . 2016,第3期

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Two new (3,6)-connected frameworks based on an unsymmetrical tritopic pyridyldicarboxylate ligand and Co_2 dimer: Structures, magnetic, and sorption properties

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