Carbon dioxide selective adsorption within a highly stable mixed-ligand Zeolitic Imidazolate Framework

摘要

A new mixed-ligand Zeolitic Imidazolate Framework Zn4(2-mbIm)3(bIm)5·4H2O (named JUC-160,2-mbIm = 2-methyIbenzimidazole, Mm = benzimidazole and JUC = Jilin University China) was synthesized with a solvothermal reaction of Zn(No3)2·6H2O, blm and 2-mbIm in DMF solution at 180 °C. Topological analysis indicated that JUC-160 has a zeolite GIS (gismondine) topology. Study of the gas adsorption and thermal and chemical stability of JUC-160 demonstrated its selective adsorption property for carbon dioxide, high thermal stability, and remarkable chemical resistance to boiling alkaline water and organic solvent for up to one week.