Journal article
Scandium sulfate complexation in aqueous solution by dielectric relaxation spectroscopy
Inorganic Chemistry, Vol.47(19), pp.8619-8628
2008
Abstract
Ion association in aqueous solutions of scandium sulfate has been investigated at 25 degrees C and at concentrations from 0.01 to 0.8 M by broadband dielectric spectroscopy over the frequency range 0.2 <or= nu/GHz <or= 89. Detailed analysis of the spectra reveals the presence of both inner- and outer-sphere 1:1 [ScSO 4] (+)(aq) complexes, similar to solutions of other high-valent metal sulfates. Outer-outer-sphere 1:1 complexes are probably also formed, but their contribution is swamped by the presence of higher-order inner-sphere complexes. The latter predominate in the more concentrated solutions, causing major changes to the low-frequency end of the spectrum. The data, while not definitive, are consistent with fac-[Sc(SO 4) 3(OH 2) 3] (3-) as the major species present. The speciation is strikingly different from that recently reported for aluminum sulfate solutions and indicates that the often-postulated similarity between the aqueous chemistry of Al(III) and Sc(III) has to be treated with caution.
Details
- Title
- Scandium sulfate complexation in aqueous solution by dielectric relaxation spectroscopy
- Authors/Creators
- S. Schrödle (Author/Creator)W. Wachter (Author/Creator)R. Buchner (Author/Creator)G. Hefter (Author/Creator)
- Publication Details
- Inorganic Chemistry, Vol.47(19), pp.8619-8628
- Publisher
- American Chemical Society
- Identifiers
- 991005543802307891
- Copyright
- © 2008 American Chemical Society
- Murdoch Affiliation
- School of Chemical and Mathematical Science
- Language
- English
- Resource Type
- Journal article
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