Ion‐molecule studies of energetic oxygen allotropes in flow tubes: O2(v),O2(aΔg1),O3,andO ${{\rm{O}}}_{2}({\rm{v}}),{{\rm{O}}}_{2}({\rm{a}}{}^{1}{\rm{\Delta }}_{{\rm{g}}}),{{\rm{O}}}_{3},\mathrm{and}{\rm{O}}$

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.