MATRIX PHOTOCHEMISTRY OF ORGANIC SULFUR-CONTAINING SPECIES WITH ATMOSPHERIC INTEREST

YANINA B. BAVA; A. LORENA PICONE; LUCIANA M. TAMONE; SAMANTHA SENG, YENY A. TOBÓN, SOPHIE SOBANSKA, ROSANA M. ROMANO

Biarritz

Congreso; Chemistry and Physics at Low Temperatures 2016; 2016

Gaseous sulfur compounds are highly reactive and play an essential role in the formation of acid rain and the generation of atmospheric aerosols.[1,2] The sulfur-containing species evolves to different oxidation states. The most studied case is the oxidation of SO2 to SO42- to form secondary sulfated aerosols; however, other less-studied cases could occur, for example the oxidation of H2S, R-SH or R-S-R to SO2 and SO42-. Gases and particles interact with solar radiation in the atmosphere leading to a variation of the atmospheric composition. In fact, many studies show that atmospheric sulfur compounds produced by marine organisms (DMS, etc.) are transformed under the influence of solar radiation to form new products or secondary aerosols.[3-5] However, the information available on the photoreactivity of organic sulfur compounds including long chain and low volatile compounds is limited. In addition, photochemical mechanisms understanding of such processes are not very well known, due to the complexity of the systems and the short lifetime of the intermediate products.