Ozonolysis of Biogenics and Model Compounds and the Fate of the Criegee Radicals

The oxidation of biogenic species such as isoprene is vital in controlling HOx levels in environments such as tropical rainforests. The mechanisms by which radical species are produced is the subject of significant uncertainty and the first part of the talk will include some recent results from the HIRAC chamber on the oxidation of isoprene and related compounds with O3 and Cl with analysis of radical intermediates by direct spectroscopic observations and end-product analysis by FTIR. An import product of the ozonolysis of alkenes is the Criegee radical. In the second part of the talk I will present some recent results on the reactions of Criegee radicals with SO2 (relevant for sulphate formation), organic acids and the water dimer.

Paul will also be very happy to meet with people during hisvisit. If you would like a chat with Paul, please let Andrew Rickard know: andrew.rickard@york.ac.uk