Journal article

Publication year: 2023

Journal: ChemPhysChem

Volume number: 24

Issue number: 11

ISSN: 1439-4235

eISSN: 1439-7641

Open access status: Hybrid

DOI Link: https://doi.org/10.1002/cphc.202300061

Publisher: Wiley

Abstract: 

Carbon 1s core-hole excitation of the molecular anion C₂⁻ has been experimentally studied at high resolution by employing the photon-ion merged-beams technique at a synchrotron light source. The experimental cross section for photo–double-detachment shows a pronounced vibrational structure associated with and core excitations of the C₂⁻ ground level and first excited level, respectively. A detailed Franck-Condon analysis reveals a strong contraction of the C₂⁻ molecular anion by 0.2 Å upon this core photoexcitation. The associated change of the molecule's moment of inertia leads to a noticeable rotational broadening of the observed vibrational spectral features. This broadening is accounted for in the present analysis which provides the spectroscopic parameters of the C₂⁻ (..) and core-excited levels.

Harvard Citation style: Schippers, S., Hillenbrand, P., Perry-Sassmannshausen, A., Buhr, T., Fuchs, S., Reinwardt, S., et al. (2023) Vibrationally Resolved Inner-Shell Photoexcitation of the Molecular Anion C2-, ChemPhysChem, 24(11), Article e202300061. https://doi.org/10.1002/cphc.202300061

APA Citation style: Schippers, S., Hillenbrand, P., Perry-Sassmannshausen, A., Buhr, T., Fuchs, S., Reinwardt, S., Trinter, F., Müller, A., & Martins, M. (2023). Vibrationally Resolved Inner-Shell Photoexcitation of the Molecular Anion C2-. ChemPhysChem. 24(11), Article e202300061. https://doi.org/10.1002/cphc.202300061