Oliver Welz

TL;DR: Direct photoionization mass spectrometric detection of formaldehyde oxide (CH2OO) as a product of the reaction ofCH2I with O2 enabled direct laboratory determinations of CH2OO kinetics, suggesting a substantially greater role of carbonyl oxides in models of tropospheric sulfate and nitrate chemistry than previously assumed.

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.

TL;DR: Implementing rate coefficients in global atmospheric models shows that reactions between CI and organic acids make a substantial contribution to removal of these acids in terrestrial equatorial areas and in other regions where high CI concentrations occur such as high northern latitudes, and implies that sources of acids in these areas are larger than previously recognized.

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.

TL;DR: The study explores the influence of the hydrocarbon's unsaturation on the stability of QOOH, which has implications for both combustion and tropospheric oxidation chemistry, and reports direct detection of a long-postulated piece of the puzzle, a so-calledQOOH intermediate.