From the electrochemical data, it can be concluded that all six DMAC-TRZ-based compounds are equally reducing in the PC TRZ, is significantly more photoreducing (E*ox = -1.66 V), comparable to fac-Ir(ppy)3 (E*ox = -1.70 V), although is less photoreducing than PTH (E*ox = -2.10 V). The time-resolved photoluminescence decays were obtained for a subset of the DMAC-