Fig. 4. 3D emission spectra and corresponding macroscopic photographs demonstrating the polarity-induced red-shift for (A) DPA–TRZ 4 and (B) DPA–CN 5 upon titration of CH₂Cl₂ into toluene (PhMe); normalized emission spectra for quantitative solvent titration series of (C) DPA–TRZ 4 titration of CH₂Cl₂ into toluene, (D) DPA–TRZ 4 titration of THF into toluene PhMe : THF, (E) DPA–CN 5 titration of CH₂Cl₂ into toluene, and (F) DPA–CN 5 titration of benzonitrile into hexane. (G–J) Corresponding plots of the ratiometric intensity of the CT versus LE states (I_CT/I_LE) (K–N) Corresponding CIE 1931 chromaticity trajectories. Together, these trajectories highlight the precise colorimetric control and partitioning of the S₁ manifold to achieve broadband, single-molecule white-light emission.