Synthesis of Porous Organic Polymers with Tunable Amine Loadings for CO(2) Capture: Balanced Physisorption and Chemisorption

The cross-coupling reaction of 1,3,5-triethynylbenzene with terephthaloyl chloride gives a novel ynone-linked porous organic polymer. Tethering alkyl amine species on the polymer induces chemisorption of CO(2) as revealed by the studies of ex situ infrared spectroscopy. By tuning the amine loading content on the polymer, relatively high CO(2) adsorption capacities, high CO(2)-over-N(2) selectivity, and moderate isosteric heat (Q(st)) of adsorption of CO(2) can be achieved. Such amine-modified polymers with balanced physisorption and chemisorption of CO(2) are ideal sorbents for post-combustion capture of CO(2) offering both high separation and high energy efficiencies.