A Robust Porous Metal-Organic Framework with a New Topology That Demonstrates Pronounced Porosity and High-Efficiency Sorption/Selectivity Properties of Small Molecules

A robust porous metalorganic framework (MOF), [Co3(ndc)(HCOO)3(mu 3-OH)(H2O)]n (1) (H2ndc=5-(4-pyridyl)-isophthalic acid), was synthesized with pronounced porosity. MOF 1 contained two different types of nanotubular channels, which exhibited a new topology with the Schlafli symbol of {42.65.83}{42.6}. MOF 1 showed high-efficiency for the selective sorption of small molecules, including the energy-correlated gases of H2, CH4, and CO2, and environment-correlated steams of alcohols, acetone, and pyridine. Gas-sorption experiments indicated that MOF 1 exhibited not only a high CO2-uptake (25.1 wt?% at 273 K/1 bar) but also the impressive selective sorption of CO2 over N2 and CH4. High H2-uptake (2.04 wt?% at 77 K/1 bar) was also observed. Moreover, systematic studies on the sorption of steams of organic molecules displayed excellent capacity for the sorption of the homologous series of alcohols (C1C5), acetone, pyridine, as well as water.