Berlin 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
SYAD: Symposium SAMOP Dissertation-Prize 2014
SYAD 1: Symposium SAMOP Dissertation-Prize 2014
SYAD 1.1: Hauptvortrag
Dienstag, 18. März 2014, 10:30–11:00, Audimax
Rotationally resolved fluorescence spectroscopy - from neurotransmitter to conical intersection — •Christian Brand — Institute for Quantum Optics, Quantum Nanophysics and Quantum Information, University of Vienna, Austria
The combination of rotationally resolved electronic spectroscopy and high level ab initio calculations allows a very detailed analysis of molecular structure both in the electronic ground and excited state. Beyond that it contains a wealth of information regarding the excited state photophysics and internal motions, and enables us to look for interactions between electronic states.
In a comprehensive study on the model system indole we observe that the energies of the two lowest excited singlet states vary systematically depending on the nature and the position of a given substituent. This is of major importance as indole is the chromophore of the aromatic amino acid tryptophan and hence is responsible for its emission properties. Depending on whether electron density is donated or withdrawn by the substituent, the energetic gap between the S1 and S2 is altered and sometimes even the energetic ordering on the states can be reversed. The photophysical consequences are numerous and will be illustrated for a number of characteristic examples.