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Interaction between liquid water and hydroxide revealed by core-hole de-excitation

Faubel, Manfred ; Hertel, Ingolf V ; Winter, Bernd ; Aziz, Emad F ; Ottosson, Niklas

Nature (London), 2008-09, Vol.455 (7209), p.89-91 [Periódico revisado por pares]

London: Nature Publishing

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Interaction between liquid water and hydroxide revealed by core-hole de-excitation
Autor: Faubel, Manfred ; Hertel, Ingolf V ; Winter, Bernd ; Aziz, Emad F ; Ottosson, Niklas
Assuntos: Aqueous solution reactions ; Atomic and molecular physics ; Effects of atomic and molecular interactions on electronic structure ; Electronic structure of atoms, molecules and their ions: theory ; Environmental and solvent effects ; Exact sciences and technology ; Fysik ; Hydrogen bonds ; Hydroxides ; Molecular properties and interactions with photons ; NATURAL SCIENCES ; NATURVETENSKAP ; Photoelectron spectra ; Physics ; Protons ; Spectrum analysis ; Studies
É parte de: Nature (London), 2008-09, Vol.455 (7209), p.89-91
Notas: ObjectType-Article-1
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Descrição: The hydroxide ion plays an important role in many chemical and biochemical processes in aqueous solution. But our molecular-level understanding of its unusual and fast transport in water, and of the solvation patterns that allow fast transport, is far from complete. One proposal seeks to explain the properties and behaviour of the hydroxide ion by essentially regarding it as a water molecule that is missing a proton, and by inferring transport mechanisms and hydration structures from those of the excess proton. A competing proposal invokes instead unique and interchanging hydroxide hydration complexes, particularly the hypercoordinated OH-(H2O)4 species and tri-coordinated OH-(H2O)3 that can form a transient hydrogen bond between the H atom of the OH- and a neighbouring water molecule. Here we report measurements of core-level photoelectron emission and intermolecular Coulombic decay for an aqueous hydroxide solution, which show that the hydrated hydroxide ion is capable of transiently donating a hydrogen bond to surrounding water molecules. In agreement with recent experimental studies of hydroxide solutions, our finding thus supports the notion that the hydration structure of the hydroxide ion cannot be inferred from that of the hydrated excess proton.
Editor: London: Nature Publishing
Idioma: Inglês

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Interaction between liquid water and hydroxide revealed by core-hole de-excitation

Faubel, Manfred ; Hertel, Ingolf V ; Winter, Bernd ; Aziz, Emad F ; Ottosson, Niklas

London: Nature Publishing

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