Given that variation of up to 270 mV was observed in the redox potentials as a function of solvent, greater attention should be paid to this factor when assessing the thermodynamic feasibility of a PC to react with a particular substrate. To better predict the capacity of a PC to undergo specific SET with a substrate, optoelectronic properties should be measured in the same solvent used for the subsequent photochemistry, this will also facilitate the rationalisation of proposed reaction mechanisms.