In addition to this CT band, the absorption spectra of the five DMAC-TRZ derivatives have a well-defined band between 335 -378 nm, which is assigned to a locally-excited ( 1 LE) transition on the substituted DMAC donor. Unlike the trend for the CT band, the LE band becomes more red-shifted when moving from EDG to EWG on the DMAC donor (e.g., λabs = 335 and 378 nm for OMePh-DMAC-TRZ and CNPh-DMAC-TRZ, respectively). The LE band is approximately ten-fold more intense than the CT peak (36 × 10 3 and 2.1 × 10 3 M -1 cm - 1 for the LE and CT peaks, respectively, for t BuPh DMAC-TRZ) allowing for the substituted DMAC-TRZ derivatives to be more absorptive at 390 nm than the parent DMAC-TRZ. dichloromethane (Ered = -1.69 V vs SCE in DCM). The limited electrochemical solvent window of DMF in the oxidation region prevented direct observation of the oxidation potential, Eox. Rather, the Eox values in DCM were used as a surrogate (Figure , Table ). When changing from EDG to EWG substituted DMAC-TRZ, Eox shifted anodically (e.g., OMePh-DMAC-TRZ, Eox = 0.79 V and CNPh-DMAC-TRZ, Eox = 1.04 V), as shown in Figure .