Conferencia: Photochemical reactions of F2 and X=C=Y molecules (with X, Y = S, Se) in matrix conditions

ROSANA M. ROMANO

Berlin

Encuentro; Fluorine as a Key Element; 2018

Freie Universität Berlin, Humboldt University Berlin y Technical University Berlin

The photochemical reactions between F2 and OCS, OCSe, CS2, CSe2 or SeCS isolated in solid argon at cryogenic temperatures were studied by FTIR spectroscopy. Molecular complexes between F2 and the triatomic molecules were identified immediately after co-deposition of the reactants diluted in Ar. These van der Waals complexes were proposed as pre-reactive species for the photochemical reactions. Novel pentatomic molecules FC(O)SF, FC(O)SeF, FC(S)SF, FC(Se)SeF and FC(S)SeF in two rotameric forms were detected after UV-visible irradiation of the matrix. The complete photochemical mechanisms were determined by the IR identification of the photoproducts. The migration of fluorine atoms in the matrixes was proposed to explain the formation of some of the products.