Relative Aromaticity/Aliphaticity Steered Pore Structure in Polyamide-Derived Ultramicroporous Carbons for Efficient CH/CH Separation.

Carbon molecular sieves (CMS) with a tunable pore structure hold significant promise for efficient CH/CH separation. However, understanding the relationship between a precursor's carbon framework and the microstructure of carbonized products is still ambiguous and requires further investigation. Herein, a relative aliphaticity/aromaticity regulated strategy was proposed to tailor the carbon skeleton of the polyamide precursor, aiming to fine tune the CMS pore size between the kinetic diameter of CH (4.