Encouraged by the unexpected sensitization potency of ps1 under confinement, we considered DESC with other, more red-shifted dyes, including ones not previously known to act as triplet sensitizers. To this end, we first focused on the fluorinated BODIPY ps2 (Fig. ), whose absorption peak is centered at ~553 nm (compared with 499 nm for ps1). Interestingly, we found that ps2 exhibited a higher-than-ps1 tendency to form heterodimers with various azoarenes; the increased PS-azoarene interactions should further promote DESC. Indeed, Fig. shows that ps2 induces a near-quantitative E→Z conversion of an equimolar amount of azobenzene 4 within only 90 s of lowintensity (2.5 mW⋅cm -2 ) yellow light (561 nm) irradiation. Moreover, the more efficient DESC allowed us to decrease the PS loading further: at only 0.01 eq of ps2 with respect to 4, the PSS was reached within ~20 min (Fig. ).