Pore size distributions were used to further investigate how grafting affects the carbon porosity (Figure ). u-CMK-3 has pore sizes of approx. 1 and 4 nm (Figure ) whereas f-CMK-3 showed a decrease in relative abundance at 4 nm. This correlates to quinones being grafted in the mesoporous region, causing a decrease in pore volume. In comparison, u-BP-1300 (Figure ) showed a high proportion of pore volumes across a range of pore widths. After grafting, the relative pore volume decreased seemingly uniformly, suggesting that the carbon pore network was being blocked throughout the structure or quinone molecules grafted uniformly to all the various pore surfaces. Finally, u-YP-80F showed a microporous pore size distribution with a large decrease at < 2 nm after functionalization. Across the three carbon materials, different pore environments were seen to decrease in pore volume after grafting, suggesting the distribution of pore sizes affects where the anthraquinone molecules grafted.