摘要
采用水热法合成得到一个具有三维孔道结构的钴有机膦酸配合物[Co2(4-pna)(OH)(4,4′-bpy)]?5H2O(1)(4-pnaH3=4-甲酸-1-萘膦酸,4,4′-bpy=4,4′-联吡啶)。配合物1的组成和结构通过单晶X-ray衍射、元素分析、红外光谱、热重等方法进行了表征。单晶X-ray衍射研究表明,配合物1结晶于正交晶系,Pbcn空间群,每一个不对称单元包含两个独立的Co^II离子、一个4-pna^3-有机膦酸配体、一个羟基、一个4,4′-bpy和五个晶格水分子。相邻的钴离子之间通过O-P-O单元、μ3-O(P)桥、μ3-O(H)桥及O-C-O单元连接沿着a-轴方向形成一维波形无机链,无机链之间分别通过第二配体4,4′-联吡啶端基氮原子和4-pna^3-有机膦酸配体氧原子相连形成三维开放孔道结构,结晶水分子通过氢键作用填充在孔道内。吸附性质研究表明,配合物1具有良好的二氧化碳吸附能力。
A cobalt phosphonates complex[Co 2(4-pna)(OH)(4,4′-bpy)]?5H 2O(1)(4-pnaH 3=4-formic acid-1-naphthalene phosphonic acid,4,4′-bpy=4,4′-bipyridine)was synthesized by hydrothermal method.The composition and structure of the complex were characterized by X-ray single crystal diffraction,elemental analysis,infrared spectroscopy and thermogravimetric analysis.Single crystal diffraction study can show that complex crystallizes in the orthorhombic system,space group Pbcn.The asymmetric unit is composed of two crystallographically distinguished Co^Ⅱ ions,one 4-pna^3-,one OH^-,one 4,4′-bpy,and five lattice water molecules.The adjacent cobalt ions are connected by O-P-O unit,μ3-O(P)bridge,μ3-O(H)bridge and O-C-O unit to form one-dimensional waveform infinite chains along the a-axis direction.The inorganic chains are connected to each other by the second ligand 4,4′-bipyridine terminal-nitrogen atoms and phosphonate ligand 4-pna 3-oxygen atoms to form a three-dimensional open pore structure,and the crystalline water molecules are filled in the pore channels by hydrogen bonding.The adsorption properties show that complex 1 has good adsorption capacity for carbon dioxide.
作者
徐艳
王红侠
李新星
李金涛
刘智骁
李杰
XU Yan;WANG Hong-xia;LI Xin-xing;LI Jin-tao;LIU Zhi-xiao;LI Jie(Department of Materials Science and Engineering,School of Information Engineering,Suqian College,Suqian 223800,China;Institute of Industrial Technology,Suqian College,Suqian 223800,China)
出处
《人工晶体学报》
EI
CAS
北大核心
2019年第9期1636-1641,共6页
Journal of Synthetic Crystals
基金
江苏省高校自然科学基金(18KJB150030)
关键词
钴离子
有机膦酸
晶体结构
二氧化碳吸附
cobalt
phosphonate
crystal structure
carbon dioxide adsorption
