Murdoch University Research Repository

Welcome to the Murdoch University Research Repository

The Murdoch University Research Repository is an open access digital collection of research
created by Murdoch University staff, researchers and postgraduate students.

Learn more

Hydration and ion association of La3+ and Eu3+ salts in aqueous solution

Friesen, S., Krickl, S., Luger, M., Nazet, A., Hefter, G. and Buchner, R. (2018) Hydration and ion association of La3+ and Eu3+ salts in aqueous solution. Physical Chemistry Chemical Physics, 20 (13). pp. 8812-8821.

Link to Published Version: https://doi.org/10.1039/c8cp00248g
*Subscription may be required

Abstract

Aqueous solutions of five lanthanide salts: LaCl3, La(NO3)3, La2(SO4)3, Eu(NO3)3 and Eu2(SO4)3 have been studied at 25 °C by dielectric relaxation spectroscopy over the frequency range 0.05 ≤ ν/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, Image ID:c8cp00248g-t1.gif, calculated from the stepwise IP formation constants were consistent with literature values.

Item Type: Journal Article
Murdoch Affiliation: School of Engineering and Information Technology
Publisher: Royal Society of Chemistry
Copyright: © 2018 Royal Society of Chemistry
URI: http://researchrepository.murdoch.edu.au/id/eprint/40742
Item Control Page Item Control Page