Gas-phase observation of the heterolytic dissociation of negative ions into counter ions: dissociation of [Cu phthalocyanine (SO3)4Na]3-

Journal of the American Society for Mass Spectrometry
Sara HashemiDiethard K Bohme

Abstract

Ion pair formation proceeding in solution at room-temperature, where it is driven by energies of solvation, has been observed in the gas-phase in the collision-induced dissociation of [Cu phthalocyanine (SO3)4Na]3- and [Cu phthalocyanine (SO3)4Na2]2- at low energies. The gas-phase observation of these charge separations into positive and negative ions, seemingly counter-intuitive, is favored sufficiently by thermodynamics to proceed at low collision energies. The combination of a high stability of the negative product anion against electron detachment and a low recombination energy of the departing positive counter ion appears to be the key requirement for such dissociations to proceed at low energies in the gas-phase.

Citations

Apr 8, 2016·Journal of the American Society for Mass Spectrometry·Rachel R Ogorzalek Loo, Joseph A Loo

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