Figure 1.

Normalized fluorescence spectra of Singlet Oxygen Sensor Green (“SOSG,” λ_excitation = 473 nm) before (“pre,” maximum intensity = 1) and after (“post”) exposure with brominated carbon nanodots (“BrCND,” pH = 3.0, λ_exposure = 365 nm, ~0.5 J•cm⁻²) under air-purged conditions. Fluorescence spectra are reported for SOSG UV-exposed with A) BrCND and B) hydrobromic acid (“HBr,” pH = 3.0) control, and under dark conditions (no exposure) for C) BrCND and D) HBr control solution. Reported spectra are the average of three analyzed solutions from one sample trial.