Except for CNPh-DMAC-TRZ (E*ox = -1.66 V) the DMAC-TRZ derivatives tend to be equally strong photoreductants (E*ox = -1.46 V to -1.54 V) yet produced remarkably divergent yields across the substrates. Additionally, none of the PCs investigated should be thermodynamically capable of directly photoreducing the substrates. These two factors imply that these compounds cannot operate via an oxidative quenching mechanism, as proposed for PTH, leading us to instead consider the conPET mechanism. For subsequent mechanistic investigation, we focused on CF3Ph-DMAC-TRZ and CNPh-DMAC-TRZ, since these tended to afford the greatest yields of dehalogenated product, as well as DMAC-TRZ as a reference comparison.