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MO: Fachverband Molekülphysik

MO 15: Environment Controlled Processes

MO 15.7: Talk

Thursday, March 9, 2017, 16:00–16:15, N 6

Photophysics and electrondynamics of indole and indole-water clusters — Thomas Kierspel^{1, 2}, •Melby Johny¹, Joss Wiese^1,2, Sebastian Trippel^1,2, and Jochen Küpper^{1, 2, 3} — ¹Center for Free Electron Laser Science (CFEL), Deutsches Elektronen Synchrotron (DESY), Hamburg, Germany — ²The Hamburg Center for Ultrafast Imaging, University of Hamburg, Germany — ³Department of Physics, University of Hamburg, Germany

The properties of atoms and molecules are strongly dependent on their environment and hydrogen bonds are of universal importance in chemistry and biochemistry [1]. Therefore, it is highly desirable to bridge the gap between single, isolated molecules and molecules in solvation.

Here, we investigate the photophysics of a spatially separated pure sample of indole-water clusters, an amino-acid chromophore (indole) solvated by single water molecule [2]. The photofgramentation owing to 1s core hole ionization of indole's nitrogen were analysed with (photoelectron) photoion-photoion coincidence (PIPICO) maps. Indications for electron and proton or hydrogen atom transfer to the hydrogen bonded water molecule, as well as different Coulomb explosion channels, due to further emission of electrons on the indole-side of the cluster, were observed.

[1] A. L. McClellan, J. Chem. Educ., 44 (9), 547 (1967)

[2] Chang, Horke, Trippel, Küpper, Int. Rev. Phys. Chem. 34(4), 557-590 (2015)