Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MO: Fachverband Molekülphysik
MO 32: Molecular Spectroscopy III
MO 32.2: Vortrag
Freitag, 6. März 2026, 11:30–11:45, P 204
Solvent-dependent relaxation pathways in Liquid-Jet Time-Resolved Photoelectron Spectroscopy — •Filippo Aria1, Alina Khodko2, and Oleg Kornilov1 — 1Max-Born-Institut, Berlin, Germany — 2Institute of Physics NAS of Ukraine, Kyiv, Ukraine
Successful engineering of biomimetic carbon-carbon photoswitches with quantum yields comparable to natural systems requires understanding how solvent environments govern their relaxation pathways. Here, we investigate the solvent-dependent excited-state lifetime of 4-dimethylamino-4'-nitrostilbene (DMANS), a benchmark push-pull photoswitch. The measurements were carried out using UV pump-XUV probe liquid-jet time-resolved photoelectron spectroscopy (LJ-TRPES) with harmonic selection via a time-delay compensated monochromator. This approach yields precise energetic shifts and lifetimes of the active excited state across a series of solvents of moderate to high polarity. The results enable assessment of ultrafast photoswitching efficiency, identification of potential long-lived dark states inaccessible to conventional optical techniques, and establish the mechanistic role of solvation in controlling switching performance. This work demonstrates XUV LJ-TRPES as an essential tool for characterizing ultrafast dynamics in both synthetic and biologically inspired molecular photoswitches.
Keywords: Photoswitch; Photoelectron Spectroscopy; XUV; Liquid Jet; Time-Resolved