一维链状[Mn(9-AC)2(4，4＇-bpy)(H2O)2]n配位聚合物的合成及晶体结构

Synthesis and Crystal Structure of One-dimensional Chain Coordination Polymer [Mn(9-AC)_2(4,4'-bpy)(H_2O)_2]_n

在水热条件下(120℃),将醋酸锰、4,4′-联吡啶(4,4′-bpy)与9-蒽酸(9-HAC)反应,得到了配位聚合物[Mn(9-AC)2(4,4′-bpy)(H2O)2]n,通过元素分析、红外光谱、X射线单晶衍射对其进行了表征,并用TGA研究了该配位聚合物的热稳定性.结构解析结果表明,该晶体属于正交晶系,Fdd2空间群,a=1.66772(12)nm,b=3.36471(16)nm,c=1.1687(4)nm,V=6.558(2)nm3,Z=8,Mr=689.60,Dc=1.397Mg/m3,R=0.0356,wR2=0.0604.在该配位聚合物中,中心锰原子采取略微变形的八面体构型,与两种配体共同构筑了一维直线形链结构,链与链之间通过氢键相互作用构筑成三维超分子网络.

Hydrothermal reactions of Mn （ Ⅱ ） acetate, 4,4＇-bipyridyl （bpy） with anthracene-9-carboxylic acid （9-HAC） resulted in a new coordination polymer [ Mn （9-AC） 2 （4,4＇-bpy） （ H2O） 2 ] n. The coordination polymer was characterized by ICP, IR, TGA and single-crystal X-ray diffraction analysis（ Mo Ka）. The crys- tal crystallizes in an orthorhombic system, space group Fdd2, a = 1. 66772（12） nm, b = 3. 36471 （16） nm, c=1. 1687（4） nm, V =6.558（2） nm3, Z=8, Mr =689.60, Dc =1.397 Mg/m^3, R=0.0356, wR2 = 0. 0604. The Mn centers in the frameworks adopt slightly distorted octahedral coordination geometry, and is bridged by 4,4＇-bpy ligands to form one-dimensional straight chain structure. The chain packing in the compound gives rise to three-dimensional structure based on weak coordination bond, hydrogen bonding interactions.