Aqueous-Phase Photoreactions of Mixed Aromatic Carbonyl Photosensitizers Yield More Oxygenated, Oxidized, and less Light-Absorbing Secondary Organic Aerosol (SOA) than Single Systems.

Figure S7 shows the absorption spectra at 0 and 180 min of irradiation. Similar to aqueous-phase photo-oxidation of phenolic compounds, 4 , 5 , 10 , 15 − 17 enhanced light absorption at wavelengths >350 nm was noted in all experiments, although DMB + ActSyr + SyrAld exhibited a decreasing trend at later reaction times.

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