Jump to main content
Jump to site search

Issue 7, 2018
Previous Article Next Article

Cl-Loss dynamics in the dissociative photoionization of CF3Cl with threshold photoelectron–photoion coincidence imaging

Author affiliations

Abstract

The dissociative photoionization of CF3Cl was investigated in the photon energy range of 12.30–18.50 eV. The low-lying electronic states of CF3Cl+ cations were prepared by the method of threshold photoelectron–photoion coincidence (TPEPICO). The threshold photoelectron spectrum and the coincident time-of-flight mass spectra at the specific photon energies were recorded. Only a CF3+ fragment was observed at lower energy, while a CF2Cl+ fragment appeared for C2E and D2E states. As Cl-loss from the ground ionic state is statistical, the total kinetic energy release distribution (KERD) is represented as a Boltzmann profile, and a 0 K appearance energy of AP0 =12.79 ± 0.02 eV is derived from the statistical modelling of the breakdown diagram from 12.60 to 12.85 eV without taking into account the kinetic shift. For the A2A1 and B2A2 states of CF3Cl+ cations, the total KERDs are bimodal, where a parallel faster dissociation appears together with the statistical distribution. At higher energies like the C2E and D2E ionic states, a bimodal distribution similar to that of the A2A1 and B2A2 states is also observed for the KERD. With the aid of the calculated Cl-loss potential energy curves, the dissociative mechanisms of internal energy-selected CF3Cl+ cations are proposed.

Graphical abstract: Cl-Loss dynamics in the dissociative photoionization of CF3Cl with threshold photoelectron–photoion coincidence imaging

Back to tab navigation

Supplementary files

Publication details

The article was received on 07 Nov 2017, accepted on 09 Jan 2018 and first published on 31 Jan 2018


Article type: Paper
DOI: 10.1039/C7CP07502B
Citation: Phys. Chem. Chem. Phys., 2018,20, 4917-4925
  •   Request permissions

    Cl-Loss dynamics in the dissociative photoionization of CF3Cl with threshold photoelectron–photoion coincidence imaging

    X. Wu, G. Tang, H. Zhang, X. Zhou, S. Liu, F. Liu, L. Sheng and B. Yan, Phys. Chem. Chem. Phys., 2018, 20, 4917
    DOI: 10.1039/C7CP07502B

Search articles by author

Spotlight

Advertisements