These parameters in many cases are solvent dependent and the values that are cited in the photocatalysis literature are frequently recorded in different media to that used in the photocatalysis reaction, thus obscuring the real thermodynamic driving force. To best identify a suitable PC for a specific reaction and to rationalize its performance, assuming that kPET/kPEnT governs reaction yield, optoelectronic data obtained in the same solvent need to be available.