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Kagawa, Akio; ; ; ;

PNC TN8410 94-078, 57 Pages, 1994/07

PNC-TN8410-94-078.pdf:1.08MB

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Metal complexes formed at the surface of aqueous solutions studied by sum frequency generation spectroscopy

Kusaka, Ryoji; Schnaars, K.; Watanabe, Masayuki

no journal, , 

To unveil the extraction mechanism of metal elements from the aqueous phase to the organic phase, we have recently suggested that it is useful to clarify the structure and the property of the metal complexes formed on the surface of aqueous solutions dissolving metal ion and extractant (ligand). In the present study, in order to reveal the mechanism of the solvent extraction of lanthanides by di-(2-ethylhexyl)phosphoric acid (HDEHP), we measured vibrational spectra of lanthanides-HDEHP complexes on the aqueous solutions in the P=O stretch region with vibrational sum frequency generation (VSFG) spectroscopy, and investigated the structure and properties of the complexes on the surface of the aqueous solutions.