High capacity CO_2 adsorption in a Mg(Ⅱ)-based phosphine oxide coordination materialti

摘要

The new porous phosphine coordination material, PCM-11, is an unusual 8,4-connected coordination polymer with an open 3-D pore structure, formed by reaction of Mg(Ⅱ) with tris-(para-carboxylato)triphenylphosphine oxide. The highly ionic nature of the metal-ligand bonding results in excellent thermal stability upon desolvation (> 460 ℃). PCM-11 is easily activated for small molecule sorption at low temperature without the requirement for solvent pre-exchange. It adsorbs 47.5 wt% CO_2 at 11.6 bar and 30 ℃.