Nitrite-Mediated Photooxidation of Vanillin in the Atmospheric Aqueous Phase

Nitrite (NO2–) and its conjugate acid, nitrous acid (HNO2), have long been recognized as a ubiquitous atmospheric pollutant as well as an important photochemical source of hydroxyl radicals (·OH) and reactive nitrogen species (·NO, ·NO2, ·N2O3, etc.) in both the gas phase and aqueous phase. Although NO2–/HNO2 plays an important role in atmospheric chemistry, our understanding on its role in the chemical evolution of organic components in...