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Accueil du site > Production scientifique > Spectroscopy and Photodissociation of the Perfluorooctanoate Anion

Spectroscopy and Photodissociation of the Perfluorooctanoate Anion

Date de publication: 4 juillet 2018

Suzie Douix, Héloïse Dossmann, Edith Nicol, Denis Duflot, Alexandre Giuliani
Chem. Eur. J. 24 15572-15576 (2018). DOI

Travail réalisé sur le site de l’Ecole Polytechnique/Sorbonne Université.

Abstract

Perfluorocarbons, a class of fully fluorinated compounds, are highly persistent and toxic pollutants that are receiving increasing attention due to their widespread environmental distribution. In this study, attention was focused on one compound in particular, namely, perfluorooctanoic acid (PFOA). The first investigation of the UV/VUV photochemistry of the PFOA anion in the gas phase by action spectroscopy of selected ions is reported. Two main relaxation channels were identified : photodissociation and photodetachment. Absolute cross sections for the individual observed processes were measured. DFT calculations and natural transition orbital analysis were carried out to help in the interpretation of the experimental results.