In contrast to the above discussed complexes, which have naphthyl substituents on the MIC, Cu Mes MIC p-An Cz, Cu Mes MIC Cz and Cu Mes MIC NPh2 that do not possess this group, appear to show greater variation in their emissive behavior. In the case of Cu Mes MIC p-An Cz, the simulated spectrum corresponding to a T1 to S0 transition with a peak starting at 428 nm nicely matches the experimental data (Figure ), which has also a first peak at 411 nm, though is followed by a broader band than the theoretical one. In any case, the simulated fluorescence does not match the measured one and the assignment leaves no doubt. For Cu Mes MIC Cz, the experimental spectrum shows a featureless band centered at 520 nm. Although theory reproduces neither the position nor shape, the assignment to an emission from the triplet is clear (Figure ). The experimental PL spectrum of Cu Mes MIC NPh2 shows a band at 387 nm and an unusual long tail beyond 550 nm, which is more closely matched by the computed T1 to S0 relaxation at 438 nm (Figure ). The overall shapes of the emission bands in that figure suggest that the origins of the emission of Cu Mes MIC NPh2 could reflect a mixture of fluorescence and phosphorescence from LE states of the diphenylamide motif.