| 通过含氮辅助配体调节的锰(Ⅱ)配位聚合物的结构和磁性质 |
| Structure and magnetic properties of Mn(Ⅱ) coordination polymers regulated by N-auxiliary ligands |
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| 摘要: 以Mn(Ⅱ)离子和6-(3'，4'-二羧基苯氧基)-1，2，4-苯三羧酸(H5L)为原料，在1，10-菲咯啉(phen)和1，4-双(1H-咪唑-1-基)苯(1，4-bib)含氮辅助配体存在下通过水热法制备了2个新型锰配位聚合物{[Mn2(HL)(phen)3(H2O)2]·7.5H2O}n (1)和[Mn4(HL)2(1，4-bib)3(H2O)2]n (2)。利用红外光谱、单晶X射线衍射、热重分析和粉末X射线衍射等手段对配位聚合物1和2的结构进行表征。单晶X射线衍射结果表明，1具有基于双核锰结构单元的一维链状结构，2具有基于四核锰结构单元的(3，8)-连接三维网络结构。磁性研究表明，1和2的锰离子之间均表现为反铁磁相互作用。由于2的四核锰结构单元中Mn…Mn间距较短，所以反铁磁相互作用较强。 |
| 关键词: 配位聚合物 晶体结构 双核锰(Ⅱ)单元 四核锰(Ⅱ)单元 磁性 |
| 基金项目: 国家自然科学基金(No.21671124)和山西工学院博士科研启动基金资助。 |
| Abstract: Two new Mn(Ⅱ) coordination polymers, namely {[Mn2(HL)(phen)3(H2O)2]·7.5H2O}n (1) and [Mn4(HL)2(1,4bib)3(H2O)2]n (2), were synthesized under hydrothermal conditions by using Mn(Ⅱ) ions and 6-(3',4'-dicarboxylphenoxy)-1,2,4-benzenetricarboxylic acid (H5L) in the presence of N-auxiliary ligands 1,10-phenanthroline (phen) and 1,4-bis(1H-imidazol-1-yl)benzene (1,4-bib). The structures of coordination polymers 1 and 2 were characterized by infrared spectroscopy, singlecrystal X-ray diffraction, thermogravimetric analysis, and powder X-ray diffraction. Single-crystal X-ray diffraction reveals that 1 has a 1D chain structure based on binuclear Mn(Ⅱ) units, while 2 features a (3,8)-connected 3D network structure based on tetranuclear Mn(Ⅱ) units. Magnetic studies show that 1 and 2 exhibit antiferromagnetic interactions between manganese ions. 2 shows stronger antiferromagnetic interactions due to the shorter Mn…Mn distances within the tetranuclear manganese units. |
| Keywords: coordination polymers crystal structures binuclear Mn(Ⅱ) unit tetranuclear Mn(Ⅱ) unit magnetism |
| 投稿时间：2024-07-16 修订日期：2024-11-11 |
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| 刘霞霞,马小芳,郭露霞,韩贤达,冯思思.通过含氮辅助配体调节的锰(Ⅱ)配位聚合物的结构和磁性质[J].无机化学学报,2025,41(3):587-596. |
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