title: Proton transfer reactions between nitric acid and acetone, hydroxyacetone, acetaldehyde and benzaldehyde in the solid phase.
abstract: The heterogeneous and homogeneous reactions of acetone, hydroxyacetone, acetaldehyde and benzaldehyde with solid nitric acid (HNO(3)) films have been studied with Reflection-Absorption Infrared Spectroscopy (RAIRS) under Ultra-High Vacuum (UHV) conditions in the 90-170 K temperature range. In the bulk or at the surface of the films, nitric acid transfers its proton to the carbonyl function of the organic molecules, producing protonated acetone-H(+), hydroxyacetone-H(+), acetaldehyde-H(+) and benzaldehyde-H(+), and nitrate anions NO(3)(-), a reaction not observed when nitric acid is previously hydrated [J. Lasne, C. Laffon and Ph. Parent, Phys. Chem. Chem. Phys., 2012, 14, 697]. This provides a molecular-scale description of the carbonyl protonation reaction in an acid medium, the first step of the acid-catalyzed condensation of carbonyl compounds, fuelling the growth of secondary organic aerosols (SOA) in the atmosphere.
authors.affiliation: Laboratoire de Chimie Physique-Matière et Rayonnement, Université Pierre et Marie Curie (UPMC -Univ. Paris 06) and CNRS (UMR 7614), 11 rue Pierre et Marie Curie, 75231 Paris Cedex 05, France.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Lasne
authors.forename: Carine
authors.initials: C
authors.lastname: Laffon
authors.forename: Philippe
authors.initials: P
authors.lastname: Parent
mesh_terms: D000079:Acetaldehyde / Q000737:chemistry*; D000096:Acetone / Q000031:analogs & derivatives / Q000737:chemistry*; D001547:Benzaldehydes / Q000737:chemistry*; D017942:Nitric Acid / Q000737:chemistry*; D011522:Protons; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature
chemical_list: D001547:Benzaldehydes; D011522:Protons; D000096:Acetone; D017942:Nitric Acid; D000079:Acetaldehyde; C032175:benzaldehyde