Dissociative electron attachment to benzoic acid (C7H6O2)

M Zawadzki; P Wierzbicka; J Kopyra

doi:10.1063/1.5135383

Dissociative electron attachment to benzoic acid (C₇H₆O₂)

J Chem Phys. 2020 May 7;152(17):174304. doi: 10.1063/1.5135383.

Authors

M Zawadzki¹, P Wierzbicka², J Kopyra²

Affiliations

¹ Department of Atomic, Molecular and Optical Physics, Faculty of Applied Physics and Mathematics, Gdańsk University of Technology, ul. Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland.
² Faculty of Exact and Natural Sciences, Siedlce University of Natural Sciences and Humanities, 3 Maja 54, 08-110 Siedlce, Poland.

PMID: 32384857
DOI: 10.1063/1.5135383

Abstract

The dissociative electron attachment (DEA) to benzoic acid (C₆H₅COOH) has been studied using an experimental crossed beam setup of a quadrupole mass spectrometer and a trochoidal electron monochromator. Relative partial cross sections for the DEA to produce negative ion fragments show the main channels for dissociation. The comparison of the present results with the ultraviolet photoelectron spectrum of benzoic acid [J. Meeks, A. Wahlborg, and S. P. McGlynn, J. Electron Spectrosc. Relat. Phenom. 22, 43 (1981)] implies that most DEA bands in the high energy range are due to Feshbach resonances with double occupation of diffuse Rydberg-like orbitals. The measurements are supported by density functional theory calculations of the threshold energies.