J
John M. Dyke
Researcher at University of Southampton
Publications - 275
Citations - 5419
John M. Dyke is an academic researcher from University of Southampton. The author has contributed to research in topics: X-ray photoelectron spectroscopy & Photoemission spectroscopy. The author has an hindex of 36, co-authored 271 publications receiving 5118 citations. Previous affiliations of John M. Dyke include Hong Kong Polytechnic University & National Institutes of Natural Sciences, Japan.
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Journal ArticleDOI
Direct measurements of conformer-dependent reactivity of the Criegee intermediate CH3CHOO
Craig A. Taatjes,Oliver Welz,Arkke J. Eskola,John D. Savee,Adam M. Scheer,Dudley E. Shallcross,Brandon Rotavera,Edmond P. F. Lee,Edmond P. F. Lee,John M. Dyke,Daniel K. W. Mok,David L. Osborn,Carl J. Percival +12 more
TL;DR: The two distinct CH3CHOO conformers, syn- and anti-, both of which react readily with SO2 and with NO2, are probed, and it is demonstrated that anti-CH 3CHOO is substantially more reactive toward water and SO2 than is syn-CH3 CHOO.
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Direct measurement of Criegee intermediate (CH2OO) reactions with acetone, acetaldehyde, and hexafluoroacetone
Craig A. Taatjes,Oliver Welz,Arkke J. Eskola,John D. Savee,David L. Osborn,Edmond P. F. Lee,Edmond P. F. Lee,John M. Dyke,Daniel W. K. Mok,Dudley E. Shallcross,Carl J. Percival +10 more
TL;DR: The reactions of the simplest Criegee intermediate, CH(2)OO (formaldehyde oxide), with three carbonyl species have been measured by laser photolysis/tunable synchrotron photoionization mass spectrometry and the rate coefficient is supported, supporting the use of hexafluoroacetone as aCriegee-intermediate scavenger.
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Vacuum ultraviolet photoelectron spectroscopy of transient species. Part 7.—The methyl radical
TL;DR: In this article, the HeI vacuum ultraviolet photoelectron spectrum of the methyl radical produced by pyrolysis of azomethane has been investigated and three ionization potentials corresponding to the formation of the 1A′1, 3E′ and 1E′ ionic states were observed with vertical ionisation potentials of 984, 1476 and 1610 eV respectively, with the aid of both ab initio and semi-empirical molecular orbital calculations.
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A new method of calculation of Franck-Condon factors which includes allowance for anharmonicity and the Duschinsky effect: Simulation of the He I photoelectron spectrum of ClO 2
TL;DR: In this article, a new method of Franck-Condon (FC) factor calculation for nonlinear polyatomics, which includes anharmonicity and Duschinsky rotation, is reported.
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Regional and global impacts of Criegee intermediates on atmospheric sulphuric acid concentrations and first steps of aerosol formation
Carl J. Percival,Oliver Welz,Arkke J. Eskola,John D. Savee,David L. Osborn,David Topping,Douglas Lowe,Steven R. Utembe,Asan Bacak,Gordon McFiggans,Michael Cooke,Ping Xiao,Alexander T. Archibald,Michael E. Jenkin,Richard G. Derwent,Ilona Riipinen,Daniel W. K. Mok,Edmond P. F. Lee,Edmond P. F. Lee,John M. Dyke,Craig A. Taatjes,Dudley E. Shallcross +21 more
TL;DR: In this paper, the authors explore the effect of Criegees on atmospheric chemistry, and demonstrate that ozonolysis of alkenes via the reaction of carbonyl oxides potentially has a large impact on atmospheric sulphuric acid concentrations and consequently the first steps in aerosol production.