Highly efficient and reversible CO2 capture by tunable anion‐functionalized macro‐porous resins

Anion functionalized strategy has been proposed for the synthesis of macro-porous resins [IRA-900][An] through the neutral reaction of the basic resin [IRA-900][OH] with the corresponding donors. Combining CO2 adsorption results and FT-IR, solid-state C-13 NMR characterization as well as quantum chemical calculations, chemical adsorption mechanism was verified and tunable capture of CO2 was realized. Among them, the anion functionalized resin [IRA-900][Triz] exhibits an extremely high adsorption capacity (4.02 mmol g(-1) at 25 degrees C, 0.15 bar), outperforming many other good adsorbents. Finally, we discuss the thermostability and recycling stability of [IRA-900][Triz], which shows a great potential in the industrial capture of CO2. (c) 2017 American Institute of Chemical Engineers AIChE J, 63: 3008-3015, 2017