| 基于异构三联苯-2，2″，4，4″-四羧酸构筑的单水桥钴(Ⅱ)、镍(Ⅱ)配位聚合物的合成、结构及磁性质 |
| Co(Ⅱ)/Ni(Ⅱ)Coordination Polymer of Isomeric Terphenyl-2,2″,4,4″-tetracarboxylic Acids with a Single Water Bridge: Syntheses, Structures, and Magnetic Properties |
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| 摘要: 使用异构三联苯-2，2″，4，4″-四羧酸配体(m-H4tpta和p-H4tpta)，通过水热法合成了2例新的单水桥Co (Ⅱ)/Ni (Ⅱ)金属链状配位聚合物[Co (m-H2tpta)(H2O)3]n(1)和{[Ni2(p-tpta)(H2O)6]·2H2O}n(2)。其结构通过FT-IR、元素分析、X射线单晶及粉末衍射进行了表征。在结构上，金属离子呈现出轻微扭曲的八面体几何构型，通过单水分子桥连接形成了一维金属链，异构H4tpta配体分别采用μ1-η1∶η0∶η1∶η0和μ4-η1∶η1∶η1∶η1配位模式与金属离子连接，形成一维链和三维网状结构，配合物2表现出(4，4)-连接的NbO型的三维拓扑网络结构。磁性方面，配合物1的Co(Ⅱ)离子间通过μ2-H2O桥传递表现出反铁磁相互作用。配合物2也展现出Ni(Ⅱ)离子间的反铁磁耦合作用，与磁耦合Ni—Ow—Ni角有关。 |
| 关键词: 配位聚合物 1,1':3',1″-三联苯-2,2″,4,4″-四羧酸 1,1':4',1″-三联苯-2,2″,4,4″-四羧酸 晶体结构 磁性 |
| 基金项目: 山西省自然科学基金(No.201901D111323)、山西省高校科技创新计划项目(No.2021L519,2020L0616)、太行文化生态研究项目(No.TH2020006)和山西省1331工程重点创新研究团队资助。 |
| Abstract: Two single water-bridged Co(Ⅱ)/Ni(Ⅱ) chains coordination polymers, namely[Co(m-H2tpta)(H2O)3]n (1) and {[Ni2(p-tpta)(H2O)6]·2H2O}n (2) were synthesized based on isomeric terphenyl-2,2″,4,4″-tetracarboxylic acid (m-H4tpta and p-H4tpta) ligands under hydrothermal conditions. They have been structurally characterized by FT-IR, elemental analysis, single-crystal, and powder X-ray diffraction analysis. Structurally, the central metal ions display slightly distorted octahedral geometries in 1 and 2, and are linked to 1D metal chains by single bridging water molecules. The isomeric H4tpta ligands coordinate metal ions in differentμ1-η1:η0:η1:η0 and μ4-η1:η1:η1:η1 coordination modes, leading to the formation of 1D chain and 3D network structure. Complex 2 displays a 3D network with (4,4)-connected NbO net topology. Magnetically, complex 1 exhibited an antiferromagnetic interaction through μ2-H2O in the uniform Co(Ⅱ) chain model. Complex 2 also showed an antiferromagnetic coupling between Ni(Ⅱ) ions corresponding to magnetic coupling Ni-Ow-Ni angles. |
| Keywords: coordination polymers 1,1':3',1″-terphenyl-2,2″,4,4″-tetracarboxylic acid 1,1':4',1″-terphenyl-2,2″,4,4″-tetracarboxylic acid crystal structures magnetism |
| 投稿时间：2022-01-25 修订日期：2022-04-17 |
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| 苏峰,李少东,韩春,吴林韬,王志军.基于异构三联苯-2，2″，4，4″-四羧酸构筑的单水桥钴(Ⅱ)、镍(Ⅱ)配位聚合物的合成、结构及磁性质[J].无机化学学报,2022,38(7):1421-1432. |
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