Schroedle, Simon and Wachter, Wolfgang and Buchner, Richard and Hefter, Glenn (2008) Scandium sulfate complexation in aqueous solution by dielectric relaxation spectroscopy. INORGANIC CHEMISTRY, 47 (19). pp. 8619-8628. ISSN 0020-1669,
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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 <= nu/GHz <= 89. Detailed analysis of the spectra reveals the presence of both inner- and outer-sphere 1:1 [ScSO4](+)(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(SO4)(3)(OH2)(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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FOLGE CHEMISCHER RELAXATION; ION ASSOCIATION; ELECTROLYTE-SOLUTIONS; ALUMINUM SULFATE; RAMAN-SPECTROSCOPY; HYDRATION; CHEMISTRY; OXIDE; SCHALLABSORPTION; PERCHLORATE; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > PD Dr. Richard Buchner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 21 Oct 2020 10:49 |
| Last Modified: | 21 Oct 2020 10:49 |
| URI: | https://pred.uni-regensburg.de/id/eprint/30184 |
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