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À propos de : Fundamental Excitations of the Shared Proton in the H3O2- and H5O2+ Complexes        

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  • Fundamental Excitations of the Shared Proton in the H3O2- and H5O2+ Complexes
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  • We exploit recent advances in argon predissociation spectroscopy to record the spectroscopic signature ofthe shared proton oscillations in the H3O2- system and compare the resulting spectrum with that of the H5O2+ion taken under similar conditions. Very intense 1 ← 0 transitions are observed below 1100 cm-1 in bothcases and are surprisingly sharp, with the 697 cm-1 transition in H3O2- being among the lowest in energy ofany shared proton system measured to date. The assignments of the three fundamental transitions associatedwith the three-dimensional confinement of the shared proton in H3O2- are carried out with full-dimensional(DMC) calculations to treat this strongly anharmonic vibrational problem.
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