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Updated: Aug 13, 2026

Exploring the Radical Nature of a Carbon Surface by Electron Paramagnetic Resonance and a Calibrated Gas Flow
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Ion-molecule studies of energetic oxygen allotropes in flow tubes:
Nicole Eyet1, Shaun G Ard2, Nicholas S Shuman2
1Chemistry Department, St. Anselm College, Manchester, New Hampshire, USA.
Abstract:
Starting in the 1960s, flow tube apparatuses have played a central role in the study of ion-molecule kinetics, allowing for immense chemical diversity of cationic, anionic, and neutral reactants. Here, we review studies of oxygen allotropes, excluding ground state O2 ( ), and focusing instead on reactions of cations, anions, and metal chemi-ionization reactions with ground state atomic oxygen (O 3P), vibrationally excited molecular oxygen (O2(v)), electronically excited molecular oxygen (O2 ( )), and ozone (O3). Historical outlines of work over several decades are given along with a focus on more recent work by our group at the Air Force Research Laboratory.
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