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Three cobalt-based coordination polymers with tripodal carboxylate and imidazole-containing ligands: syntheses, structures, properties and DFT studies

机译:具有三码头羧酸酯和含咪唑配体的三种基于钴的配位聚合物:合成,结构,性质和DFT研究

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Three cobalt-based coordination polymers [Co(Htatb)(1,3-bimyb)] (1), [Co(Htatb)(bimbp)]center dot DMF (2), and [Co(Htatb)(1,4-bimyb)]center dot H2O (3) [H(3)tatb = 4,4',4 ''-s-triazine-2,4,6-tribenzoic acid, 1,3-bimyb = 1,3-bis(imidazole-1- ylmethyl)benzene, bimbp = 4,4'-bis(imidazolyl)biphenyl, 1,4-bimyb = 1,4-bis (imidazole-1-ylmethyl)benzene] were synthesized by hydrothermal reactions and characterized by single-crystal X-ray diffraction, thermogravimetric analyses, IR spectroscopy, UV-vis spectroscopy and elemental analysis. Compound 1 shows a double-strand chain structure, due to the intermolecular O-H center dot center dot center dot O hydrogen bonds and aromatic pi-pi stacking interactions, the adjacent chains are connected to produce a 3D supramolecular structure. Compound 2 shows a 2D structure with a 1D channel. Compound 3 displays a 2D layer structure, furthermore these layers are joined by O-H center dot center dot center dot O hydrogen bonding to generate a four-fold interpenetrating 3D architecture. The fluorescence properties of 1-3 and the magnetic behavior of 1 and 2 have also been investigated. Based on their crystal structures, compounds 1 and 2 were investigated using hybrid DFT methods at the B3LYP/6-31G (d) level. The DFT-BS approach was applied to study the magnetic coupling behavior. The results reveal that the calculated exchange coupling constants J were in good agreement with the experimental data.
机译:基于钴的配位聚合物[CO(HTATB)(1,3-BimyB)](1),[CO(HTATB)(BIMBP)]中心点DMF(2),以及[CO(HTATB)(1,4- Bimyb)]中心点H2O(3)[H(3)TATB = 4,4',4',4' - 三嗪-2,4,6-呋喃乙酸,1,3- BimyB = 1,3-双(咪唑-1-基甲基)苯,BiMBP = 4,4'-双(咪唑基)联苯基,1,4-BimyB = 1,4-双(咪唑-1-基甲基)苯是通过水热反应合成的,其特征是单一的 - 克里斯特X射线衍射,热重分析,IR光谱,UV-Vis光谱和元素分析。化合物1表示双链链结构,由于分子间O-H中心点中心点中心点O氢键和芳族PI-PI堆叠相互作用,相邻的链连接以产生3D超分子结构。化合物2示出了具有1D通道的2D结构。化合物3显示2D层结构,此外这些层由O-H中心点中心点中心点O氢键连接,以产生四倍的互穿3D架构。还研究了1-3的荧光性能和1和2的磁性特性。基于其晶体结构,使用B3LYP / 6-31G(D)水平的杂合DFT方法研究化合物1和2。应用DFT-BS方法来研究磁耦合行为。结果表明,计算的交换耦合常数J与实验数据吻合良好。

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    《RSC Advances》 |2019年第66期|共10页
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  • 正文语种 eng
  • 中图分类 化学;
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