Related Experiment Video
Updated: Jun 7, 2025

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
Published on: July 27, 2018
Threshold photoelectron spectroscopy of organosulfur radicals
Emil Karaev1, Marius Gerlach1, Dorothee Schaffner1
1University of Würzburg, Institute of Physical and Theoretical Chemistry, Am Hubland, 97074 Würzburg, Germany. ingo.fischer@uni-wuerzburg.de.
Abstract:
We report vibrationally resolved threshold photoelectron spectra of several sulfur-containing reactive intermediates. This includes the organosulfur radicals CH2S, CH3S, CH2SH, CH3S2, and S2H, which are relevant in atmospheric chemistry and in astrochemical settings. Due to the high reactivity, the radicals were prepared in situ via pyrolysis of (CH3)2S2. The organosulfur species were characterized by photoion mass-selected threshold photoelectron spectroscopy, employing the photoelectron-photoion coincidence setup (PEPICO) and synchrotron radiation from the Swiss Light Source. We report improved ionization energies and characterize ionic ground and excited states, both singlet and triplet. The vibrational structure was simulated based on computed geometries and vibrational frequencies, giving insight into the geometry change upon ionization.
Related Concept Videos
Electron Paramagnetic Resonance (EPR) Spectroscopy: Organic Radicals
Radical Reactivity: Nucleophilic Radicals
Radical Reactivity: Overview
Radical Reactivity: Steric Effects
Along with electronic...
Radical Reactivity: Electrophilic Radicals
Preparation and Reactions of Sulfides

