Düsseldorf 2007 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 11: Biomolecules
MO 11.5: Vortrag
Montag, 19. März 2007, 15:00–15:15, 6B
Towards the structure-selective measurement of exited state dynamics in DNA clusters — •Yuliya Rulyk1, Elena Samoylova1, Thomas Schultz1, Hans-Hermann Ritze1, Wolfgang Radloff1, and Ingolf-Volker Hertel1, 2 — 1Max Born Institute, Max-Born Strasse 2a, D-12489, Berlin, Germany — 2Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, D-14195, Berlin, Germany
Femtosecond pump-probe mass and electron spectroscopy is a powerful method for studying ultrafast exited state relaxation in DNA clusters. Nevertheless, this method has two substantial limitations. First, it is not selective with respect to different isomers of DNA clusters, which are expected to show different exited state dynamics. Second, the investigation of small clusters is impeded by fragmentation of bigger clusters.
To overcome the limitations mentioned, we develop an advanced method which combines ns hole-burning spectroscopy and time-resolved fs pump-probe mass spectroscopy. In this experiment, selected species are ionized by a ns UV pulse and removed from the active region of a spectrometer. The remaining species are characterized with fs pump-probe mass spectroscopy. We report on the progress and a first test of the experiment on indole-water clusters.