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Updated: Jun 12, 2026

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
Published on: July 27, 2018
Structures of products from positive ion-molecule reactions by means of vibrational spectroscopy
Jos Oomens1, Thomas Hellman Morton
1FOM Institute of Plasma Physics, Rijnhuizen, Edisonbaan 14, Nieuwegein, The Netherlands.
Abstract:
Examples of various approaches to determining gaseous ion structures are described. Two cases are presented in which infrared multiple photon dissociation (IRMPD) spectroscopy provides characteristic information. Comparison with DFT-calculated normal modes differentiates isomers. The IRMPD spectrum of the even-electron C(8)D(8)F(+) product ion from the ion-molecule reaction of CF(3)(+) with perdeuterated acetophenone exhibits a degree of resolution sufficient to identify C(6)D(5)CFCD(3)(+) and rule out ring-fluorinated isomers. The dimerization of phenylacetylene with its molecular ion has been explored, with the conclusion that a mixture of product ions is formed. The best match to the experimental spectrum is achieved by superimposing the bands calculated for ionized 1-phenylazulene and ionized 1,2-diphenylcyclobutadiene.
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