A Zn Metal–Organic Framework with High Stability and Sorption Selectivity for CO2

A three-dimensional porous Zn metal–organic framework (UPC-12) with high thermal and chemical stability was isolated in high yield and purity from a hydrothermal reaction. UPC-12 exhibits high selectivity for CO2 due to the formation of hydrogen bonds between CO2 molecules and the −COOH groups exposed inside the channels and the effective π–π interactions between CO2 molecules and the pillared bipyridine moieties of the MOF. The adsorption–desorption process was studied, for the first time, by both 13C CP-TOSS NMR spectroscopy and in situ DRIFTS.