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Updated: Apr 25, 2026

Determination of the Gas-phase Acidities of Oligopeptides
Published on: June 24, 2013
Simultaneous imaging of both product ions: exploring gateway states for HCl as a benchmark molecule
M Poretskiy1, A I Chichinin, C Maul
1Institut für Physikalische und Theoretische Chemie, Technische Universität Braunschweig, Hans-Sommer-Straße 10, 38106 Braunschweig, Germany. mikhail.poretskiy@gmail.com.
Abstract:
Simultaneous imaging of both positive and negative product ions is used to exclusively study photoion pair formation free from interference of competing fragmentation channels. Resonance enhanced multi-photon excitation allows us to interrogate potential energy surfaces for vastly differing molecular geometries. 3D imaging provides complete fragment information. We applied the technique to HCl as a benchmark and identified the gateway state leading to photoion pairs. The approach can easily be applied to any molecule exhibiting a potential with an attractive part at large internuclear distances.
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