Following these results, we considered how the reactivity of photocatalysts could differ between solution and solvent-minimized conditions. Comparing photophysical parameters between the solid and solution-states is understandably challenging; for instance, the Beer-Lambert law cannot be applied to a solvent-minimized environment, where light scattering from the surface of non-transparent materials is a dominating factor. Nevertheless, recognizing the consistent performance of [Ir1] in these reactions, we next probed its photophysics, Figure . The photoluminescence (PL) spectrum of [Ir1] remains broadly the same in both neat powder form and as a solution in DMA or DME, with only a slight red-shift of the emission onset for the solid sample, which would constitute a slight decrease in the excited-state energy of the photocatalyst in the absence of solvent. This reflects the monomolecular emission from a locally-excited ligand-centered (LC) state, as has previously been described for this complex. As an anaerobic solution in DMA, the emission of [Ir1] decays with monoexponential kinetics, with a lifetime, tPL, of 1797 ns (lit.