shows the reddest emission among the DiKTa-based MR emitters. The Stokes shift of 3TPA-DiKTa is 42 nm and of 3DPA-DiKTa is 41 nm. The emission of both emitters is narrow, with FWHM of 54 nm or energy width at half maxima (EWHM) of 252 meV for 3TPA-DiKTa and FWHM of 47 nm or EWHM of 168 meV for 3DPA-DiKTa. These values reveal only a modest degree of reorganization in the excited state compared to the ground state. The slightly broader emission of 3TPA-DiKTa than 3DPA-DiKTa is due to a greater admixture of CT character to the SRCT emissive excited state. The EWHM value of 3DPA-DiKTa is smaller than that of 3TPA-DiKTa yet similar to that of DiKTa (172 meV or 27 nm), indicating the more pronounced LRCT character of the SRCT excited state of 3TPA-DiKTa, which aligns with the coupled cluster calculations analysis (Figure ). Figure shows the effect of oxygen on the steady-state PL in toluene. The FPL values in degassed toluene are 44% for 3TPA-DiKTa and 59% for 3DPA-DiKTa, which decreased in the presence of oxygen to 33%