CV and DPV of DMAC-TRZ (for comparison) and the five emitters (Figure ) were carried out in DCM. The electrochemistry of DMAC-TRZ (oxidation attributed to the DMAC and reduction attributed to the triazine) matches that previously reported data, The absorption spectra of the five derivatives reveal the first instance of a structure-property trend that will be a staple for the series: t BuPh-DMAC-TRZ and OMePh-DMAC-TRZ have similar behaviour, as do CF3Ph-DMAC-TRZ, and dPh-DMAC-TRZ, while the behaviour of CNPh-DMAC-TRZ is rather distinct. Distinct from the absorption spectrum of DMAC-TRZ, there is a well-defined low-energy band (e > 10 4 M -1 cm -1 ) in the absorption spectra of all five emitters (Figure ). This band is assigned to a p-p* transition localized on the aryl-substituted DMAC donors. around 400 nm (e = 2170 M -1 cm -1 ) and is of a similar profile to that of the highly twisted conformer of DMAC-TRZ. CNPh-DMAC-TRZ has two absorption bands, at 369 nm and 318 nm, assigned by TDDFT calculations (Figure ) to different 1 LE transitions on the acridine donor to the S3, and S5