CO2 adsorption properties of a Ca(II)-based organophosphonium coordination material.

PCM-14 is a dense coordination polymer formed from Ca(II) and an unusual organophosphonium ligand. The dehydrated framework contains 3-coordinate Ca(II) sites within catenated, chiral 3,3-connected nets. PCM-14 exhibits a stark CO(2) sorption selectivity over H(2), N(2) and O(2).