Figure illustrates the cyclic voltammetry of 1,4-, 1,5-, and 1,8-BTMAPAQ isomers at various scan rates under a pure stream of CO2. For comparison, the cyclic voltammetry of these compounds under a pure stream of N2 is depicted as a dashed line at 300 mV/s. The CV plots of the isomers at all other scan rates under a pure N2 headspace is further shown in Figure . For each isomer, a new oxidation peak emerges under the CO2 headspace, shifted to more positive potentials compared to that under pure N2 headspace, while the reduction peak remains almost identical. The more positive oxidation peak corresponds to the newly formed 𝐴𝑄(𝐶𝑂 2 ) 2 2-redox-active species, which cannot exist under the pure nitrogen environment.