Deep insight into the photodissociation of OSSO

Many sulfuric compounds are known to be present in the Venus atmosphere. Such species may play an important role in the energy budget of the planet, the formation and destruction of other species, especially when these species reacts between them or with photon. Recently, OSSO was identified as a near-UV absorber in the Venusian atmosphere. This latter is formed from the association of two SO molecules and its destruction leads to SO dimers. In this talk, we will discuss the behavior of the low lying singlet and triplet electronic states and the possible species that may be produced after photon absorption. Using ab-initio and molecular dynamic methods, we investigate the photo-production of S₂, O₂, SO, S₂O and SO₂ from OSSO isomers. Non-adiabatic molecular dynamics methods provide important insight into the importance of photodissociation channels in dictating chemistry in the Venus atmosphere.