Abstract
A new aromatic porous organic polymeric material named as N-PKIN has been successfully constructed. The electron-rich benzene in its microstructure can donate the electron density to the neighboring indole and carbonyl groups to further enhance the local dipole-π and dipole-quadrupole binding abilities to the CO2 molecules for effectively facilitating the adsorbent to attract CO2 selectively. As a result, this porous organic polymer showed outstanding CO2 absorption capacity and high CO2/N2, CO2/CH4 selectivity. In addition, upon exposure to humid condition, the porous organic polymer still kept high CO2 capture capacity and selectivity. Moreover, we have demonstrated that the CO2 absorption process is fully reversible.
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