Photolysis of ketones (1, 1-oMe, 2, 2-oMe, 3, and 4) adsorbed on ZSM-5 zeolites produces persistent carbon-centered radicals that can be readily observed by conventional steady-state EPR spectroscopy. The radicals are persistent for time periods of seconds to many hours depending on the supramolecular structure of the initial radical@zeolite complex and the diffusion and reaction dynamics of ra...

The Cl˙ initiated oxidation reactions of diethyl ketone (DEK; 3-pentanone; (CH3CH2)2C=O), 2,2,4,4-d4-diethyl ketone (d4-DEK; (CH3CD2)2C=O) and 1,1,1,5,5,5-d6-diethyl ketone (d6-DEK; (CD3CH2)2C=O) are studied at 8 Torr and 550-650 K using Cl2 as a source for the pulsed-photolytic generation of Cl˙. Products are monitored as a function of reaction time, mass, and photoionization energy using mult...

Abstract. In order to enlarge our understanding of biomass burning plume chemistry, the OH-radical-initiated oxidation 3-penten-2-one (3P2), identified in emissions, and 2-hydroxypropanal (2HPr) was investigated at 298 ± 3 K 990 15 mbar two atmospheric simulation chambers using long-path FTIR spectroscopy. The rate coefficient 3P2 + OH determined be (6.2 1.0) × 10−11 cm3 molec.−1 s−1 molar firs...