Hannover 2016 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 19: Posters 4: Novelties in Molecular Physics: Femtosecond Spectroscopy, Molecular Clusters, Cold Molecules and Helium Droplets

MO 19.16: Poster

Donnerstag, 3. März 2016, 16:30–19:00, Empore Lichthof

Infrared Laser Spectroscopy of Organic Radicals and their Bimolecular Complexes — •Daniel Leicht, Matin Kaufmann, Raffael Schwan, Daniel Habig, Gerhard Schwaab, and Martina Havenith — Ruhr-Universität Bochum, Bochum, Germany

Organic radicals are known to be important intermediates in many reactions e.g. in combustion, explosives and tropospheric chemistry. Using the technique of helium nanodroplet infrared spectroscopy we study organic radicals including but not limited to the allyl and benzyl radicals. The helium droplet environment enables us to not only study the bare radicals but also their bimolecular complexes with other small molecules (i.e. water, hydrochloric acid, oxygen, nitric oxide). In the case of water and HCl we observe the formation of H-bonds to the radicals’ π-systems; these H-bonded complexes can be viewed as the exit channel of the hydrogen abstraction reaction by either Cl atoms or OH radicals from the corresponding organic compound. Open-shell species, such as oxygen and nitric oxide, however, chemically react with the organic radicals to form e.g. peroxy species. The spectroscopic observation of these organic radicals and their complexes therefore helps us to better understand their formation and reactivity.