Syntheses, structural diversities and magnetic properties of four new Co(II) coordination polymers with phthalic acid derivatives

Syntheses, structural diversities and magnetic properties of four new Co(II) coordination polymers with phthalic acid derivatives
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四种新型Co(II)配位聚合物与邻苯二甲酸衍生物的合成、结构多样性和磁性能

DOI:
10.1016/j.poly.2012.12.032
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发表时间:
2013-03
期刊:
影响因子:
2.6
通讯作者:
Dai-Zheng Liao
Dai-Zheng Liao
中科院分区:
化学3区
文献类型:
--
作者:
Shi-Yuan Zhang;Na Xu;Wei Shi;Peng Cheng;Dai-Zheng Liao

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合成了四种新的三维Co(II)配位聚合物[Co(4apa)(H2O)](1)、[Co(bpy)(3npa)](2)、[Co(bpy)1.5(3adpa)](3)和[Co(btx)0.5(4npa)(H2O)2] (4) (H24apa=4-氨基邻苯二甲酸,bpy=4,4 ' -联吡啶,H23npa=3-氨基-1,3-二氧异吲哚-2-基)邻苯二甲酸,btx=1,4-二(1,2,4-三唑-1-甲基)苯,H24npa=4-硝基邻苯二甲酸)),并通过单晶x射线衍射、PXRD和磁化率测试对其进行了表征。在配位聚合物3的形成过程中发现了一个有趣的3-氨基邻苯二甲酸(H23apa)的原位酰化反应。每种聚合物的Co(II)离子位于扭曲的八面体环境中,并被μ1,3羧酸基团桥接形成2D(1)、1D(2和3)和二聚体(4)结构,这些结构由于取代基的影响,通过配体进一步组装成不同的3D结构。在2 ~ 300k范围内对磁化率的温度依赖性研究揭示了μ1,3羧酸基传递的Co(II)离子之间在1 ~ 4处的反铁磁相互作用。
Four new 3D Co(II) coordination polymers, [Co(4apa)(H2O)] (1), [Co(bpy)(3npa)] (2), [Co(bpy)1.5(3adpa)] (3) and [Co(btx)0.5(4npa)(H2O)2] (4) (H24apa=4-aminophthalic acid, bpy=4,4′-bipyridine, H23npa=3-nitrophthalic acid, H23adpa=3-(4-amino-1,3-dioxoisoindolin-2-yl)phthalic acid, btx=1,4-bis(1,2,4-triazole-1-ylmethyl)benzene, H24npa=4-nitrophthalic acid), have been synthesized and characterized by single crystal X-ray diffraction, PXRD and magnetic susceptibility measurements. An interesting in situ acylation reaction of 3-aminophthalic acid (H23apa) has been found in the formation of coordination polymer 3. The Co(II) ions of each polymer lie in distorted octahedral environments and are bridged by μ1,3carboxylate groups to form 2D (1), 1D (2 and 3) and dimer (4) structures, which are further assembled through ligands into different 3D structures due to the influence of the substituent groups. Studies of the temperature dependence of the magnetic susceptibilities in the range 2–300K reveal antiferromagnetic interactions in 1–4 between the Co(II) ions transmitted by μ1,3carboxylate groups.
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