萘二膦酸锰配位聚合物:合成、晶体结构和磁性质  

Naphthalene Bisphosphonate Manganese Coordination Polymer:Synthesis,Crystal Structure,and Magnetic Properties

作　　者：高文康 徐艳[1] 李艳 王慧玟 常嘉汶 GAO Wen-kang;XU Yan;LI Yan;WANG Hui-wen;CHANG Jia-wen(Department of Materials Engineering,Institute of Information Engineering,Suqian University,Suqian 223800,China)

机构地区：[1]宿迁学院信息工程学院材料工程系,江苏宿迁223800

出　　处：《化学试剂》2024年第2期61-66,共6页Chemical Reagents

基　　金：2022年宿迁学院优秀毕业论文培育项目;江苏省青蓝工程;宿迁学院科研创新团队项目(2021td01);宿迁学院西楚学者高层次人才项目。

摘　　要：从1,4-萘二膦酸配体出发,采用水热法合成了一例萘二膦酸锰配位聚合物:[Mn(1,4-ndpaH_(2))(4,4-bpy)(H_(2)O)_(2)]·3H_(2)O(1,4-ndpaH 4=1,4-萘二膦酸,4,4′-bpy=4,4′-联吡啶),通过单晶X-射线衍射、元素分析、红外光谱、粉末X-射线衍射及热重分析表征了聚合物的结构和热稳定性。单晶结构分析表明,目标聚合物中金属MnⅡ离子呈六配位畸变的八面体几何构型,相邻的金属Mn^(Ⅱ)离子通过辅助配体4,4′-bpy连接成一维链,这些一维链再进一步通过萘膦酸配体连接成二维层状结构,结晶水分子填充在层间空隙内,通过氢键和范德华作用力固定于骨架结构中。目标聚合物的磁学性质研究表明,MnⅡ离子之间存在反铁磁相互作用。Starting from the 1,4-naphthalenediphosphonic acid ligand,a novel manganese phosphonate coordination polymer,[Mn(1,4-ndpaH_(2))(4,4-bpy)(H_(2)O)_(2)]·3H_(2)O(1),was synthesized using hydrothermal method(1,4-ndpaH 4=1,4-naphthalene bisphosphonic acid,4,4′-bpy=4,4′-bipyridine).The structure and thermal stability of the polymer were characterized through single crystal X-ray diffraction,elemental analysis,infrared spectroscopy,powder X-ray diffraction,and thermogravimetric analysis.Single-crystal structure analysis showed that the metal MnⅡions in target polymer adopt a distorted octahedral geometry with six coordination sites.Adjacent Mn^(Ⅱ)ions were connected into one-dimensional chains by the auxiliary ligand 4,4′-bpy,and further connected into two-dimensional layered structure through the naphthalenediphosphonic acid ligands.Water molecules are filled in the interlayer gaps,anchored within the framework through hydrogen bonds and van der Waals forces.The magnetic properties study of polymer showed the presence of antiferromagnetic interactions between MnⅡions.

关 键 词：萘二膦酸 锰配合物 晶体结构 磁性质 

分 类 号：O641.4[理学—物理化学]