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Article Dans Une Revue Journal of Physical Chemistry Letters Année : 2023

Vacuum Ultraviolet Fingerprints as a New Way of Disentangling Tropylium/Benzylium Isomers

Résumé

The two inseparable companions, tropylium (Tr+) and benzylium (Bz+), were interrogated by vacuum ultraviolet (VUV) radiation from 4.5 to 7.0 eV in an ion trap. These new fingerprints provide a new means of distinguishing these two intertwined C7H7+ isomers. In particular, the singular spectral signature of Tr+ in the VUV consists of a single strong electronic transition at ≈6 eV. To illustrate this diagnostic tool, we shed light on the structure of the C7H7+ intermediate that is ubiquitous when using commercial atmospheric pressure photoionization (APPI) sources. We have identified its structure as the 7-membered ring Tr+, which contradicts some previous beliefs.
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hal-04213652 , version 1 (29-09-2023)

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Corentin Rossi, Bérenger Gans, Alexandre Giuliani, Ugo Jacovella. Vacuum Ultraviolet Fingerprints as a New Way of Disentangling Tropylium/Benzylium Isomers. Journal of Physical Chemistry Letters, 2023, 677, pp.8444-8447. ⟨10.1021/acs.jpclett.3c01973⟩. ⟨hal-04213652⟩
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