摘要：Polycyclic aromatic compounds are ubiquitous atmospheric pollutants with toxic, mutagenic, and carcinogenic properties. They are produced from chemical reactions of their parent compounds in the atmosphere as well as from a wide variety of anthropogenic sources such as fuel combustions. The present review is mainly concerned with several reaction pathways regarding secondary formation of atmospheric polycyclic aromatic hydrocarbon (PAH) derivatives, i.e. , formation of mutagenic nitrated PAHs, 1- and 2-nitrotriphenylene, via gas-phase OH or NO3 radical-initiated reactions of the parent triphenylene, atmospheric formation of hydroxynitropyrenes from a photochemical reaction of 1-nitropyrene, and photochemical degradation of selected nitrated and oxygenated PAHs on airborne particles under simulated solar UV-irradiation.
