Anthraquinone functionalization of the three carbons was carried out using a diazonium radical reaction as previously reported. In this process, 2-aminoanthraquinone was used to covalently attach the quinone molecules to the carbon surface upon loss of the amino group. Gas sorption experiments were run on unfunctionalized (u) and functionalized (f) carbon samples to investigate the porosity of the materials (Figure ). Importantly, all three carbons showed a decrease in nitrogen uptake following functionalization, consistent with the successful grafting of anthraquinones on the carbon surfaces. u-CMK-3 showed a Type IV isotherm, according to IUPAC classification, typical of a mesoporous carbon (Figure ). When functionalized with anthraquinone, a decrease in the adsorbed nitrogen volume was seen in the mesoporous region (0.5 to 0.7 P/P0) suggesting that grafting took place in the carbon mesopores. The u-BP-1300 isotherm indicated the presence of both micropores and mesopores in the carbon due to a high uptake volume at low relative pressure and a hysteresis loop at high relative pressure (Figure ). After grafting, an adsorbed volume decrease was seen in the microporous region with some decrease at high relative pressures also seen, suggesting anthraquinone grafting in both micropores and mesopores. Finally, u-YP-80F showed an isotherm consistent with a predominantly microporous material (Figure ) and upon functionalization, a decrease in uptake volume was seen in the microporous region.