Friesen, Sergej and Krickl, Sebastian and Luger, Magdalena and Nazet, Andreas and Hefter, Glenn and Buchner, Richard (2018) Hydration and ion association of La3+ and Eu3+ salts in aqueous solution. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 20 (13). pp. 8812-8821. ISSN 1463-9076, 1463-9084
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Aqueous solutions of five lanthanide salts: LaCl3, La(NO3)(3), La-2(SO4)(3), Eu(NO3)(3) and Eu-2(SO4)(3) have been studied at 25 degrees C by dielectric relaxation spectroscopy over the frequency range 0.05 /GHz 89. Detailed analysis of the solvent-related modes located at higher frequencies showed that both La3+ and Eu3+ are strongly hydrated, even including partial formation of a third hydration shell similar to that of Al3+(aq). Up to two solute-related modes could be detected at lower frequencies, due to the formation of various types of 1:1 ion pairs (IPs). All five salts showed modest levels of association in the order Cl- < NO3- << SO42-, mostly in the form of double-solvent-separated IPs with small amounts of solvent-shared IPs. Overall association constants, calculated from the stepwise IP formation constants were consistent with literature values.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FOLGE CHEMISCHER RELAXATION; DIELECTRIC-RELAXATION; ELECTROLYTE-SOLUTIONS; SULFATE COMPLEXATION; INORGANIC COMPLEXES; MOLECULAR-DYNAMICS; LANTHANIDE IONS; SPECTROSCOPY; LANTHANUM(III); CONSTANTS; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie 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: | 04 Mar 2020 14:41 |
| Last Modified: | 04 Mar 2020 14:41 |
| URI: | https://pred.uni-regensburg.de/id/eprint/14740 |
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