锌（Ⅱ）配合物的超分子设计及对甲醇蒸气的吸附性能

摘要

采用饱和蒸气扩散技术,将2,4-二羟基苯甲醛缩异烟酰腙(H2dhbi)配体分别与Zn(ClO4)2·6H2O和Zn(NO3)2·6H2O进行配位作用,得到2种不同配位模式的金属-有机框架材料[(dhbi)2Zn2·8H2O]n(1)和{[(dhbi)2(H2O)2Zn2]·4DMF]}n(2).利用X射线单晶衍射、热分析技术(TG-DTA)和X射线粉末衍射( PXRD)等方法进行了结构表征.进一步将配位聚合物1和2用于对甲醇分子的吸附性能研究,结果表明,化合物1是一种理想的微孔材料,其对甲醇分子的吸附能力为化合物2的近5倍,采用PLATON对材料的孔隙体积进行计算得到化合物1和2的孔隙率分别为38.2%和5.5%.%By employing the N'-( 2 , 4-dihydroxybenzylidene )-isonicotinohydrazide ligand to assemble with zinc ions in different solvents, the two metal-organic frameworks ( MOFs) 1 and 2 were obtained, namely [(dhbi)2Zn2·8H2O]n(1) was obtained from the ligand assemble with Zn(ClO4)2·6H2O,{[(dhbi)2(H2O)2Zn2]·4DMF]}n(2) was obtained from the ligand assemble with Zn(NO3)2 ·6H2O using diffusion technology of saturated vapor. Single crystal diffraction was used to characterize their struc-tures. Thermogravimetric analysis ( TG-DTA ) and powder X-ray diffraction ( PXRD ) were used to measure their thermal stability and purity. The results of vapor adsorption for MeOH indicate that complex 1 is a kind of satisfactory microporous material, further the complex 1 shows 38. 1% void volume, and the complex 2 shows 5. 5% void volume according to PLATON calculations.