title: Spectroscopy and picosecond dynamics of aqueous NO₂.
abstract: We investigate the formation of aqueous nitrogen dioxide, NO2 formed through femtosecond photolysis of nitrate, NO₃⁻ and nitromethane CH3NO2(aq). Common to the experiments is the observation of a strong induced absorption at 1610 ± 10 cm(-1), assigned to the asymmetric stretch vibration in the ground state of NO2. This assignment is substantiated through isotope experiments substituting (14)N by (15)N, experiments at different pH values, and by theoretical calculations and simulations of NO2-D2O clusters.
authors.affiliation: Department of Chemistry, Aarhus University, Langelandsgade 140, DK 8000 Aarhus C, Denmark.
authors.forename: Ane Riis
authors.initials: AR
authors.lastname: Gadegaard
authors.affiliation: Department of Chemistry, Aarhus University, Langelandsgade 140, DK 8000 Aarhus C, Denmark.
authors.forename: Jan
authors.initials: J
authors.lastname: Thøgersen
authors.affiliation: Department of Chemistry, Aarhus University, Langelandsgade 140, DK 8000 Aarhus C, Denmark.
authors.forename: Svend Knak
authors.initials: SK
authors.lastname: Jensen
authors.affiliation: Department of Chemistry, Aarhus University, Langelandsgade 140, DK 8000 Aarhus C, Denmark.
authors.forename: Jakob Brun
authors.initials: JB
authors.lastname: Nielsen
authors.affiliation: Department of Physics, Albanova University Center, Stockholm University, S-106 91 Stockholm, Sweden.
authors.forename: Naresh K
authors.initials: NK
authors.lastname: Jena
authors.affiliation: Department of Physics, Albanova University Center, Stockholm University, S-106 91 Stockholm, Sweden.
authors.forename: Michael
authors.initials: M
authors.lastname: Odelius
authors.affiliation: Department of Chemistry, Aarhus University, Langelandsgade 140, DK 8000 Aarhus C, Denmark.
authors.forename: Frank
authors.initials: F
authors.lastname: Jensen
authors.affiliation: Department of Chemistry, Aarhus University, Langelandsgade 140, DK 8000 Aarhus C, Denmark.
authors.forename: Søren Rud
authors.initials: SR
authors.lastname: Keiding