To examine the influence of the ground state pKa, Figure presents curves for different pKa values (8 in red, 9 in yellow, and 10 in purple). Higher pKa values were expected to result in reduced dependence of the protonated photoacid portion on bicarbonate concentration. Conversely, a lower pKa of 7 would lead to a lower effective concentration, while a pKa of 6 would result in most of the photoacid remaining in the deprotonated form regardless of the bicarbonate concentration. This deprotonation would significantly diminish CO2 release capacity under light. Therefore, careful consideration of the ground state pKa is crucial during the initial design phase of photochemical carbon capture systems employing photoacids in bicarbonate buffer systems.