A New Manganese Coordination Polymer Based on Azobenzene Tetracarboxylate and Auxiliary Pyridine Ligand:Synthesis,Crystal Structure and Magnetic Property

• 来源期刊: 结构化学
• 年，卷（期）: 2021,（2）
• 所属期刊栏目: coordination cbemistry
• 页码范围: 217-224
• 页数: 8页
• 语种: 英文
• DOI: 10.14102/j.cnki.0254-5861.2011-2809

摘要

A new manganese coordination polymer(CP)has been synthesized under hydrothermal conditions.It's formula is {Mn2(Oaobtc)(bpe)(H2O)4]}n,where H4Oobtc represents oxide azobenzene 2,2',3,3'-tetracarboxyl acid,and bpe is l,2-bis(4-pyridine)ethylene.It was characterized by elemental analysis,infrared spectrum and X-ray single-crystal diffraction.The coordination polymer crystallizes in the monoclinic system,space group P21/c.The central ion was coordinated with H4Oobtc ligands using bridging model,and carboxylic group connects two adjacent Mn(Ⅱ)ions into dimer units.The oxygen from carboxylates connect these dimer units into a one-dimensional(1D)chain,and N atoms from the bpe further expanded them into three-dimensional(3D)supramolecular edifice,eventually.Variable-temperature magnetic measurements of CP 1 indicate the presence of weak antiferromagnetic exchange between two nearest Mn(Ⅱ)ions with J=-0.367 cm-1