Hannover 2010 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 7: Poster: Femtosecond Spectroscopy

MO 7.15: Poster

Dienstag, 9. März 2010, 16:00–18:30, Lichthof

Sub-Picosecond Time-Resolved Infrared Spectroscopy of 3-Hydroxyflavone in solution — •Katharina Chevalier, Matthias M.N. Wolf, and Rolf Diller — Fachbereich Physik, TU Kaiserslautern, D-67663 Kaiserslautern

The properties of 3-hydroxyflavone and its intramolecular proton transfer after electronic excitation have been subject to numerous investigations, including stationary FTIR, femtosecond fluorescence and transient absorption spectroscopy in the visible.

Here we present to our knowledge the first results of sub-picosecond time-resolved IR vibrational spectroscopy of the photoinduced processes in 3-hydroxyflavone in solution. The results yield direct insight into photoinduced dynamics and structural information on the respective educt and product states. The observed vibrational bands can be compared to results from infrared/resonant 2-photon ionisation (IR/R2PI) experiments in gas phase [1].

[1] K. Bartl, A. Funk, K. Schwing, H. Fricke, G. Kock, H.-D. Martin, M. Gerhards, Phys. Chem. Chem. Phys. 2009, 11, 1173