Freiburg 2024 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 24: Poster: Experimental Techniques
MO 24.2: Poster
Donnerstag, 14. März 2024, 17:00–19:00, Tent C
Ultrafast dynamics of Metanil Yellow studied by time-resolved transient absorption and XUV photoelectron spectroscopies in solution — •Alina Khodko1, 4, Matthew Mgbukwu3, Camilo Granados1, 3, Evgenii Titov2, Nataliia Kachalova4, 5, Valerii Voitsekhovych4, Igor Dmytruk4, 6, Stefan Haacke3, Oleg Kornilov1, and Jérémie Léonard3 — 1Max Born Institute, Berlin, Germany — 2Institute of Chemistry, University of Potsdam, Germany — 3Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, France — 4Institute of Physics, Kyiv, Ukraine — 5L.M. Litvinenko Institute of Physical and Organic Chemistry and Coal Chemistry, Kyiv, Ukraine — 6Taras Shevchenko National University of Kyiv, Ukraine
The excited-state dynamics of the Metanil Yellow (MY) were studied by ultrafast transient absorption (TA) spectroscopy and state-of-the-art XUV time-resolved photoelectron spectroscopy (TRPES). Here the TA experiments were carried out with two excitation wavelengths, λ=370 nm and λ=490 nm, to investigate the non-hydrated and hydrated forms of the molecule and reveal differences in their dynamics in two solvents: water and ethanol. In TRPES experiments the dynamics were studied in water solution, using a λ=400 nm pump, thus exciting both forms. In general, the timescales from the TRPES experiments are in good agreement with the results from the TA measurements. Based on quantum chemical calculations, the dynamics are tentatively assigned to the S2*S1 conversion followed by relaxation to a long-lived state, the nature of which remains to be confirmed.
Keywords: transient absorption spectroscopy; XUV time-resolved photoelectron spectroscopy; aminoazobenzene; metanil yellow