High CO2 Uptake Capacity and Selectivity in a Fascinating Nanotube-Based Metal–Organic Framework

An unusual porous metal–organic framework has been synthesized by using Pb­(II) and rigid V-shaped 4,4′-(pyri­dine-3,5-diyl)­diiso­phthalic acid (H4L). Structure analysis reveals that there exist 1D cylindrical 14.26 Å and triangular prism 10.69 × 10.69 × 10.69 Å3 nanotubes in the framework. Gas sorption behavior of the nanoporous MOF shows a relatively high capacity and selectivity of CO2 over CH4.