Magnetic resonance studies of solutions containing 115In

Most metal extraction studies focus on the kinetics, the maximum loading and the extraction equilibrium, while structural information on the extracted complexes has been limited. This paper concerns the nature of the indium(iii) chloride complexes, present in the organic and aqueous phase during the solvent extraction of indium(iii) from an aqueous HCl solution by undiluted ionic liquids Cyphos IL 101 and Aliquat 336. In an aqueous HCl solution (0-12 M), indium(iii) exists as octahedral mixed complexes, [In(HO)Cl] (0 ≤ n ≤ 6). EXAFS and In NMR were used to characterize these species. The stoichiometric composition of the extracted complexes, which is estimated from viscosity and maximum loading studies and confirmed by EXAFS, is unaffected by the HCl concentration in the aqueous phase. Indium(iii) is present in the ionic liquid phase as the tetrahedral [InCl] complex. Based on the speciation results an extraction mechanism is proposed.

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“…These broad 115 In resonances are characteristic for the presence of [In(H 2 O) 6-n Cl n ] 3-n mixed complexes of low symmetry. [53][54]…”

Section: Indium(iii) Speciation In the Aqueous Phasementioning

confidence: 99%

Speciation of indium(iii) chloro complexes in the solvent extraction process from chloride aqueous solutions to ionic liquids

et al. 2017

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“…According to Molodov [14], Lawson [15] and Armstrong [16] [17,[18][19][20][21]. Using the NMR method, Cannon, Fratiello and co-workers [22,23] proved that in acidic solutions of non-complexing electrolytes the In(III) ions exist in the form of [In(H 2 O) 6 ] 3+ . Such a statement was confirmed by Celeda and Maeda in their studies using dilatometry methods [24] and X-ray diffraction [25].…”

Section: Introductionmentioning

confidence: 99%

Catalytic activity of thiourea and its selected derivatives on electroreduction of In(III) in chlorates(VII)

Nosal‐Wiercińska

2010

Open Chemistry

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It was found that thiourea, N-methylthiourea, N,N'-dimethylthiourea and N-allylthiourea accelerate the electroreduction process of In(III) ions in chlorates(VII). These substances are adsorbed on mercury from chlorates(VII). The relative surface excesses of thiourea and its derivatives increase with the increase of their concentrations and electrode charge. After adding thiourea, N-methylthiourea, N,N'-dimethylthiourea and N-allylthiourea to the solution an acceleration of the electroreduction process of In(III) ions occurs. This process depends on two factors: the adsorption of an accelerating substance on mercury and on the formation of complexes between a depolarizer and an accelerating substance on the electrode surface. The equilibrium of this complexing reaction determines the magnitude of the catalytic effect.© Versita Warsaw and Springer-Verlag Berlin Heidelberg.

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“…Auch die 2 H-Resonanz zeigte keine meßbare Verschiebung bei Zugabe von NaB02 . Somit erhält man mit dem gemessenen Frequenzverhältnis v( 10 B)/v( 2 H) und mit Hilfe des Verhältnis-ses v( 2 H)/r( 1 H) =0,153 506 083(60) von Smaller 22 und dem unkorrigierten magnetischen Moment des Protons im Wasser //p = 2,7927 740 (11) von Cohen und Taylor 23 das für diamagnetische Abschirmung der Elektronen unkorrigierte magnetische Moment des 10 …”

Section: Magnetisches Moment Von 10 Bunclassified

“…10 ) und 203 T1, 205 T1 (Ref. n " 13 ) 10. B ist in dieser Reihe der Kern mit dem schwächsten KernSonderdruckanforderungen an Prof. Dr. O. Lutz, Physikalisches Institut der Universität Tübingen, D-7400 Tü-bingen, Auf der Morgenstelle.…”

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Fourier-Kernresonanzuntersuchungen an ¹⁰ B und ¹¹ B in wäßriger Lösung / Fourier Transform NMR Studies of ¹⁰ B and ¹¹ B in Aqueous Solutions

Epperlein

Lutz

Schwenk

1975

Zeitschrift Für Naturforschung A

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The ratios of the Larmor frequencies of 10 B and 2 H and of n B and 10 B have been measured with the NMR method and a magnetic moment has been calculated for 10 B in the B (OH) 4~-ion. For this, an investigation of the dependence of the NMR signals of 10 B and 2 H on the concentration of some boron salts in solutions of H20 and D20 was necessary. Using hyperfine interaction constants from literature, the hyperfine structure anomaly 10 /1 11 of boron in the 2 P1/2 atomic ground state has been calculated. A difference in the magnetic shielding between the isotopes 10 B and n B in different compounds could not be detected.

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Magnetic resonance studies of solutions containing 115In

Cited by 27 publications

References 8 publications

Speciation of indium(iii) chloro complexes in the solvent extraction process from chloride aqueous solutions to ionic liquids

Speciation of indium(iii) chloro complexes in the solvent extraction process from chloride aqueous solutions to ionic liquids

Catalytic activity of thiourea and its selected derivatives on electroreduction of In(III) in chlorates(VII)

Fourier-Kernresonanzuntersuchungen an ¹⁰ B und ¹¹ B in wäßriger Lösung / Fourier Transform NMR Studies of ¹⁰ B and ¹¹ B in Aqueous Solutions

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Magnetic resonance studies of solutions containing 115In

Cited by 27 publications

References 8 publications

Speciation of indium(iii) chloro complexes in the solvent extraction process from chloride aqueous solutions to ionic liquids

Speciation of indium(iii) chloro complexes in the solvent extraction process from chloride aqueous solutions to ionic liquids

Catalytic activity of thiourea and its selected derivatives on electroreduction of In(III) in chlorates(VII)

Fourier-Kernresonanzuntersuchungen an 10 B und 11 B in wäßriger Lösung / Fourier Transform NMR Studies of 10 B and 11 B in Aqueous Solutions

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Fourier-Kernresonanzuntersuchungen an ¹⁰ B und ¹¹ B in wäßriger Lösung / Fourier Transform NMR Studies of ¹⁰ B and ¹¹ B in Aqueous Solutions