The photophysical properties of all three molecules were first studied in toluene solution (Figure and Table ). There are three distinct absorption bands in the UV-Vis absorption spectra of 4DMAC-TPPQ and 4PXZ-TPPQ, while there are only two bands in the spectrum of TPPQ. The strong absorption band at 314 nm present in all three spectra corresponds to a LE p-p* transition of the TPPQ moiety (ε = 69.9 × 10 3