Targeting a quinone-functionalised carbon material for electrochemical CO2 capture, we adapted a previously developed synthetic route that employs a diazonium radical reaction (Scheme 2). We selected CMK-3 mesoporous carbon and 2-aminoanthraquinone to yield the anthraquinone functionalised carbon, f-CMK-3. We hypothesized that the use of a mesoporous carbon for the functionalisation reaction would avoid pore blockage, leaving sufficient porosity following functionalization for electrolyte and CO2 access during electrochemical CO2 capture. N2 gas sorption isotherms at 77 K showed typical Type IV adsorption-desorption hysteresis loops for u-CMK-3 and f-CMK-3, consistent with the presence of mesopores, as well as a steep uptake at low relative pressures (0.0 to 0.1 P/P0), consistent with the presence of micropores (Figure & Section S2). Upon quinone grafting, f-CMK-3 shows a decrease in adsorbed volume at relative pressures greater than 0.5 P/P0, suggesting that anthraquinone molecules have been grafted in the carbon mesopores, rather than in the micropores. Our findings are consistent with previous studies, that also attributed a decrease in surface area after quinone grafting to the presence of quinones on the carbon structure. However, gas sorption alone cannot be used to infer whether chemical grafting of anthraquinone has taken Scheme 2. Functionalisation of CMK-3 using 2-AAQ and tert-butyl nitrite (TBN) used as the radical initiator.