二维配位聚合物[Cu(ox)(4,4′-bpy)]_n的水热合成与结构表征

Hydrothermal Synthesis and Structure Characterization of a 2D Coordination Polymer [Cu(ox)(4,4'-bpy)]_n

采用水热方法合成出一种新型配位聚合物[Cu(ox)(4,4′-bpy)]n(ox=草酸根离子,4,4′-bpy=4,4′-联吡啶),并通过X射线单晶结构分析、元素分析以及红外光谱测定对该化合物进行了表征.结果表明,标题化合物属于单斜晶系,Cm空间群,晶胞参数a=1·1921(7)nm,b=1·153(7)nm,c=0·5155(4)nm,β=113·38(3)°,V=0·6291(7)nm3,Z=2.该化合物是一个由{Cu(ox)}n链通过桥联配体4,4′-bpy垂直相连并具有矩形格子结构的二维层状配位聚合物,层与层之间交错排列,通过C4,4′-bpy—H…Oox层间氢键作用,进一步扩展成三维超分子网络结构.

A new polymer [Cu（ox）（4,4＇-bpy） ]n（1）（ox=C20^2-4, 4,4＇-bpy = 4,4＇-bipyridine） was hydro- thermally synthesized and characterized via elemental analyses, IR spectrum and single crystal X-ray diffrac-tion. The polymer crystallizes in a monoelinie system, space group Cm,α=1.1921（7）nm, b=1.153（7）nm, c=0.5155（4）nm,β=113.38（3）°, V=0.6291（7）nm^3, Z=2. Cu atom in the title compound is in an oetahedral geometry with four O atoms from two bis-ehelating oxalate ligands in equatorial plane and two N atoms from the 4,4＇-bpy ligands in the axial position. The crystal structure possesses infinite {Cu（ox）}n chains connected with each other by the bridging 4,4＇-bpy ligands in a perpendicular manner, leading to a 2D layered network with rectangular grids. The layers stacking in a staggered fashion are further assembled by C4.4,.bpy H…Oox hydrogen bonds and lead to a 3D supramoleeular architecture.