Solvation structures of protons and hydroxide ions in water
2013 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 138, no 15, 154506- p.Article in journal (Refereed) Published
X-ray Raman spectroscopy (XRS) combined with small-angle x-ray scattering (SAXS) were used to study aqueous solutions of HCl and NaOH. Hydrated structures of H+ and OH- are not simple mirror images of each other. While both ions have been shown to strengthen local hydrogen bonds in the hydration shell as indicated by XRS, SAXS suggests that H+ and OH- have qualitatively different long-range effects. The SAXS structure factor of HCl (aq) closely resembles that of pure water, while NaOH (aq) behaves similar to NaF (aq). We propose that protons only locally enhance hydrogen bonds while hydroxide ions induce tetrahedrality in the overall hydrogen bond network of water.
Place, publisher, year, edition, pages
2013. Vol. 138, no 15, 154506- p.
Atom and Molecular Physics and Optics Physical Chemistry
IdentifiersURN: urn:nbn:se:su:diva-90786DOI: 10.1063/1.4801512ISI: 000317814900027OAI: oai:DiVA.org:su-90786DiVA: diva2:628611
FunderNIH (National Institute of Health)Swedish Research Council