Dissociative electron attachment to carbon tetrachloride probed by velocity map imaging.

0581719 - ÚFCH JH 2025 RIV GB eng J - Článek v odborném periodiku
Paul, A. - Nandi, D. - Slaughter, D. S. - Fedor, Juraj - Nag, Pamir
Dissociative electron attachment to carbon tetrachloride probed by velocity map imaging.
Physical Chemistry Chemical Physics. Roč. 26, č. 7 (2024), č. článku 5783. ISSN 1463-9076. E-ISSN 1463-9084
Grant CEP: GA MŠMT(CZ) LTAUSA19031
Institucionální podpora: RVO:61388955
Klíčová slova: negative ion formation * CCl4 * chloromethanes
Obor OECD: Physical chemistry
Impakt faktor: 3.3, rok: 2022
Způsob publikování: Open access
https://pubs.rsc.org/en/content/articlelanding/2024/cp/d3cp04834a

Bond-breaking in CCl4via dissociative electron attachment (DEA) has been studied using a velocity map imaging (VMI) spectrometer. A number of effects related to the dissociation dynamics have been revealed. The near-zero eV s-wave electron attachment, which leads to the production of Cl- anions, is accompanied by a very efficient intramolecular vibrational redistribution. This is manifested by a small fraction of the excess energy being released in the form of the fragments' translation energy. A similar effect is observed for higher-lying electronic resonances with one exception: the resonance centered around 6.2 eV leads to the production of fast Cl2- fragments and their angular distribution is forward peaking. This behavior could not be explained with a single-electronic-state model in the axial recoil approximation and is most probably caused by bending dynamics initiated by a Jahn-Teller distortion of the transient anion. The CCl2- fragment has a reverse backward-peaking angular distribution, suggesting the presence of a long-distance electron hopping mechanism between the fragments.
Trvalý link: https://hdl.handle.net/11104/0350240