手性拓扑结构有机骨架材料Cu(mal)(bpy)·2H_2O的分离性能研究  

Study on seperation performance of a chiral metal-organic framework-Cu(mal)(bpy)·2H_2O

作　　者：方智利[1] 李康宇 熊姗[1] 

机构地区：[1]华东交通大学材料学院,江西南昌330013

出　　处：《化学研究与应用》2017年第4期472-478,共7页Chemical Research and Application

基　　金：国家自然科学基金项目(21365012)资助

摘　　要：以S-苹果酸(S-mal)和4,4'-联吡啶(bpy)为配体与铜离子反应,通过水热法合成了一种具有二维手性网络拓扑结构的金属有机骨架(MOFs)材料{Cu(mal)(bpy)·2H_2O}。并使用X射线衍射(XRD)和扫描电子显微镜(SEM)对其结构和形貌进行了表征。将该MOFs材料用作毛细管手性气相色谱柱,研究其对烷烃、芳香异构体和外消旋体的分离性能。实验结果表明,该固定相对直链烷烃、甲酚、苯二酚和硝基甲苯等位置异构体有很好的分离效果,在所测试的几种外消旋体中只对外消旋α-蒎烯分离效果显著。芳香异构体在固定相上的吸附过程为放热过程,同时受焓和熵的控制。A homochiral MOF{ Cu(mal)(bpy)·2H_2O} [S-mal = S-malic acid,bpy = 4,4-bipyridyl]with 2D chiral channel was synthesized and used as a new chiral stationary phase to prepare a capillary gas chromatographic column via a static coating procedure to study the separation performanceforlinear alkanes,aromatic isomers and raceme.The X-ray diffraction(XRD) and Scanning Electron Microscope(SEM) were used to determine the structure and morphology of the chiral MOFs.The results showed that the column could offer good separations for linear alkanes,as well as aromatic positional isomers(e. g. cresol,hydroquinone,nitrotoluene)and racemic compound(α-pinene). The effect of temperature on separation of aromatic positional isomers was investigated to elucidate entropy and enthalpy controlling of the separation process.

关 键 词：金属有机骨架 气相色谱 芳香异构体 Α-蒎烯 

分 类 号：O657.71[理学—分析化学]