Journal ArticleDOI
Photolysis of methyl vinyl ketone at 193.3 nm: quantum yield determinations of methyl and vinyl radicals
TLDR
In this article, the primary dissociation processes in the photolysis of methyl of methyl vinyl ketone (MVK) at 193.3 nm have been investigated and a quantum yield of close to unity for the formation of both CH 3 and C 2 H 3 radicals has been determined using real-time absorption data in conjunction with gas chromatography analysis of final products.Abstract:
The primary dissociation processes in the photolysis of methyl of methyl vinyl ketone (MVK) at 193.3 nm have been investigated. A quantum yield of close to unity for the formation of both CH 3 and C 2 H 3 radicals has been determined using real-time absorption data in conjunction with gas chromatography analysis of final products. Detailed kinetic modeling of the system indicates a rate constant of (1.5±0.3)×10 -10 cm 3 molecule -1 s -1 for the cross-combination of methyl vinyl radicalsread more
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Journal ArticleDOI
Kinetics of the C2H3 + H2 ⇄ H + C2H4 and CH3 + H2 ⇄ H + CH4 Reactions
TL;DR: In this article, the potential energy surface and properties of the transition state for reactions (1, −1) were studied by ab initio methods and used to create a transition state model of the reaction.
Journal ArticleDOI
Reactions and Kinetics of Unsaturated C2 Hydrocarbon Radicals
Allan H. Laufer,Askar Fahr +1 more
Journal ArticleDOI
Atmospheric fate of methyl vinyl ketone and methacrolein
Tomasz Gierczak,Tomasz Gierczak,James B. Burkholder,James B. Burkholder,Ranajit K. Talukdar,Ranajit K. Talukdar,Abdelwahid Mellouki,Abdelwahid Mellouki,Stephen B. Barone,Stephen B. Barone,A. R. Ravishankara,A. R. Ravishankara +11 more
TL;DR: In this article, the rate coefficients for the reaction of OH with methacrolein (MACR, CH2C(CH3)CHO) between 232 and 378 K were measured using the pulsed laser photolysis-pulsed laser induced fluorescence (PP-PLIF) technique.
Journal ArticleDOI
Experimental and Theoretical Study of the C2H3 ⇄ H + C2H2 Reaction. Tunneling and the Shape of Falloff Curves
Vadim D. Knyazev,Irene R. Slagle +1 more
TL;DR: In this paper, the authors studied the kinetics of the unimolecular decomposition of the C2H3 radical in a tubular flow reactor coupled with a photoionization mass spectrometer.
Journal ArticleDOI
Absolute Photoionization Cross-Section of the Methyl Radical†
Craig A. Taatjes,David L. Osborn,Talitha M. Selby,Giovanni Meloni,Haiyan Fan,Stephen T. Pratt +5 more
TL;DR: The absolute photoionization cross-section of the methyl radical has been measured using two completely independent methods to allow relative photoionized efficiency spectra of methyl radical to be placed on an absolute scale and will facilitate quantitative measurements of methyl concentrations by photoionizing mass spectrometry.
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