Three Å-scale pores, pore-10, pore-13, and pore-16 are investigated. The digits represent the number of missing carbon atoms for forming pores (Figure ). For a given number of missing carbon atoms, the pore skeleton is consistent with the most probable structure reported in the literature, validated by the observation under microscopy. Pore edges are functionalized with C=O (3-4 edge atoms) and ether groups (rest of the pore edge atoms). The assignment of the number of C=O is consistent with the experimental data based on the concentration of C=O per pore when pores are created by oxidation. The remaining pore edge atoms are passivated by ether because, upon oxidation, ether is formed at the center of the oxygen cluster.