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首页> 外文期刊>Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics >Self-Assembly of a Series of Cobalt(II) Coordination Polymers Constructed from H(2)tbip and Dipyridyl-Based Ligands
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Self-Assembly of a Series of Cobalt(II) Coordination Polymers Constructed from H(2)tbip and Dipyridyl-Based Ligands

机译：从H（2）tbip和基于联吡啶的配体构造的一系列钴（II）配位聚合物的自组装。

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A series of interesting Co(II)-H(2)tbip coordination polymers incorporating different auxiliary ligands, {[Co(tbip)(bipy)(H2O)(3)]center dot 0.5(bipy)center dot H2O}(n) (1), [Co(tbip)(bipy)](n)(2), {[Co-3(tbip)(3)(dpe)(3)]center dot 0.5(dpe)center dot 3H(2)O}(n) (3), [Co-2(tbip)(2)(dpe)(H2O)](n) (4), [Co-2(tbip)(2)(bpa)(H2O)](n) (5), and {[Co-2(tbip)(2)(bpa)(2)]center dot 2.5H(2)O}(n) (6) (H(2)tbip = 5-tert-butyl isophthalic acid; bipy = 4,4'-bipyridine; dpe = 1,2-di (4-pyridyl)ethylene; bpa = 1,2-bi(4-pyridyl)ethane) were synthesized. X-ray structural analyses of 1-6 reveal a diverse range of structures, ranging from 1D (1) to 2D (2, 6) to 3D (3, 4, 5). Complex 1 shows 1 D zigzag bipy-bridged polymeric chains with the terminal tbip ligands as pendants, which are extended to a 3D hydrogen-bonded supramolecular framework involving 1 D open channels which encapsulate guest bipy molecules. Polymers 2 and 6 feature similar 2D infinite layer frameworks consisting of cobalt dimers. The structure of 3 is constructed from [CO2(tbip)(2)](n) layers, which consists of alternating left- and right-handed helical chains, and further pillared by dpe ligands into a 3D six-connected self-penetrating 4(8).6(6).8 network. The prominent cavities in 3 are parallel to the (101) plane and encapsulate free dpe as guest molecules. Polymers 4 and 5 are isostructural, showing 2-fold interpenetrating 3D alpha-Po networks constructed from binuclear cobalt nodes. The thermal stabilities and X-ray powder diffraction studies indicate that the framework of 3 can keep stable after the loss of guest molecules. Studies of the magnetic susceptibilities of 2-6 reveal weak antiferromagnetic exchange interactions between adjacent Co(II) centers.
机译：一系列有趣的Co（II）-H（2）tbip配位聚合物，结合了不同的辅助配体，{[Co（tbip）（bipy）（H2O）（3）]中心点0.5（bipy）中心点H2O}（n） （1），[Co（tbip）（bipy）]（n）（2），{[Co-3（tbip）（3）（dpe）（3）]中心点0.5（dpe）中心点3H（2） O}（n）（3），[Co-2（tbip）（2）（dpe）（H2O）]（n）（4），[Co-2（tbip）（2）（bpa）（H2O）] （n）（5）和{[Co-2（tbip）（2）（bpa）（2）]中心点2.5H（2）O}（n）（6）（H（2）tbip = 5-合成叔丁基间苯二甲酸;联吡啶＝ 4，4′-联吡啶; dpe ＝ 1，2-二（4-吡啶基）乙烯; bpa ＝ 1，2-联（4-吡啶基）乙烷。 1-6的X射线结构分析显示了从1D（1）到2D（2，6）到3D（3，4，5）的各种结构。配合物1显示出一维锯齿状双联桥聚合物链，其中末端tbip配体为侧基，延伸至包含一维开放通道的3D氢键键合超分子骨架，该通道封装了来宾双联分子。聚合物2和6具有类似的由钴二聚体组成的2D无限层骨架。 3的结构由[CO2（tbip）（2）]（n）层构成，该层由交替的左手和右手螺旋链组成，并进一步由dpe配体形成3D六连接自穿透4 （8）.6（6）.8网络。 3中的突出空腔平行于（101）平面，并封装了自由dpe作为客体分子。聚合物4和5是同构结构，显示了由双核钴结点构成的2倍互穿3Dα-Po网络。热稳定性和X射线粉末衍射研究表明，3的骨架在客体分子损失后可以保持稳定。对2-6的磁化率的研究表明，相邻Co（II）中心之间的反铁磁交换相互作用较弱。

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