Erlangen 2018 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 15: Complex Systems in the Gas Phase

MO 15.4: Vortrag

Mittwoch, 7. März 2018, 14:45–15:00, PA 1.150

IR/UV Ion-Dip-Spectroscopy of Reactive Species in the Gas Phase — •Florian Hirsch¹, Ingo Fischer¹, and Anouk M. Rijs² — ¹Institute of Physical and Theoretical Chemistry, Wuerzburg University, Am Hubland Süd, 97074 Wuerzburg, Germany — ²Institute for Molecules and Materials, Radboud University , FELIX Laboratory, Toernooiveld 7-c, 6525 ED Nijmegen, The Netherlands

Reactive species like radicals, carbenes and biradicals play an important role in a large variety of different chemical systems like combustion, atmospheric and interstellar chemistry. Due to their high reactivity regular analytic methods often cannot be applied and experiments must be performed in isolated environments.

Here we apply IR/UV Ion-Dip-Spectroscopy to investigate the structure of these reactive molecules and their reaction products in a free jet environment. This method combines mass selectivity of regular time-of-flight mass spectrometry with the structural information obtained by IR spectroscopy. Molecules are ionized in a [1+1] resonance enhanced multiphoton process at a fixed UV wavelength. Additionally, a free electron laser (Free Electron Laser for Infrared Experiments, FELIX, Nijmegen, Netherlands) scans the fingerprint region (550 - 1750 cm-1) resulting in mass selective IR spectra of the species in the molecular beam. Finally, comparison of the experimental data with calculations results in the structural data and may furthermore give insight into electronic structure and reaction pathways.