AbstractTwo novel transition-metal coordination polymers with the formulas [Co(L1)(bbi)(H2O)]n (1) and {[Co(L2)(phen)]·H2O}n (2) (H2L1 = 1,4-naphthalenedi- carboxylic acid, H2L2 = 5-OH-1,3-benzenedicarboxylic acid, bbi = 1,1′-(1,4-butanediyl)bis(imidazole), phen = 1,10-phenanthroline) have been hydrothermally synthesized and characterized by techniques of single crystal X-ray diffraction, infrared spectra, elemental analysis, powder X-ray diffraction, and variable-temperature magnetic susceptibility measurements. X-ray crystal structure analyses reveal that complex 1 exhibits 2D framework with 4-connected sql topology and is further extended into a 3D supramolecular architecture via strong O–H···O and weak C–H···O hydrogen-bonding interactions, while complex 2 features a 1D ladder-like chain with a 3-connected (42·6) topological structure. Magnetic studies showed the presence of an antiferromagnetic interaction between adjacent Co(II) ions in both complexes.Graphical AbstractTwo new mixed ligand complexes of cobalt based on N-heterocylic and carboxylate ligands were readily obtained and characterized. The topological structures, thermal stabilities and magnetic properties of which are observed and discussed.

中文翻译：

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基于 N-杂环和不同羧酸盐配体的 Co(II) 混合配体配合物的合成、结构和磁性

摘要两种新型过渡金属配位聚合物的分子式为 [Co(L1)(bbi)(H2O)]n (1) 和 {[Co(L2)(phen)]·H2O}n (2) (H2L1 = 1,4 -萘二甲酸、H2L2 = 5-OH-1,3-苯二甲酸、bbi = 1,1'-(1,4-丁二基)双(咪唑)、phen = 1,10-菲咯啉)已被水热合成并采用单晶X射线衍射、红外光谱、元素分析、粉末X射线衍射和变温磁化率测量技术进行表征。X 射线晶体结构分析表明，配合物 1 显示出具有 4 连接 sql 拓扑结构的 2D 框架，并通过强 O-H···O 和弱 C-H···O 氢键相互作用进一步扩展为 3D 超分子结构，而复合体 2 具有一维梯形链，具有 3 连通 (42·6) 拓扑结构。磁性研究表明，在这两种配合物中，相邻的 Co(II) 离子之间存在反铁磁相互作用。图形摘要 很容易获得并表征了两种基于 N-杂环和羧酸盐配体的新型钴混合配体配合物。观察和讨论了它们的拓扑结构、热稳定性和磁性。