Speciation of Ruthenium(III) Chloro Complexes in Hydrochloric Acid Solutions and Their Extraction Characteristics with an Amide-Containing Amine Compound
Abstract
:1. Introduction
2. Materials and Methods
2.1. Reagents
2.2. Measurement of UV-Vis Absorption Spectra
2.3. Extraction Procedure
2.4. XAFS Measurements
2.5. Fourier-Transform Infrared (FT-IR) Spectroscopy Measurements
3. Results and Discussion
3.1. Analysis of Ru Species in Aqueous HCl
3.1.1. Estimation of Equilibration Time for Aquation/Chloridation of Ru
3.1.2. Speciation of Ru Species
3.2. Ru(III) Extraction Studies
3.2.1. Extraction Ability of EHBAA
3.2.2. Structural Study of Ru Extracted by EHBAA
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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HCl Conc. | Path | N a | R (Å) | σ2 (Å2)b | ΔE (eV)c | R-Factor |
---|---|---|---|---|---|---|
0.7 M | Ru-Cl | 3.7(1) | 2.343(3) | 0.0039 d | –1.5 | 0.018 |
Ru-O | 2.3(1) | 2.055(6) | 0.0014 d | |||
1.0 M | Ru-Cl | 3.7(1) | 2.342(3) | 0.0039 d | –1.8 | 0.018 |
Ru-O | 2.3(1) | 2.056(6) | 0.0014(8) | |||
2.0 M | Ru-Cl | 4.0(1) | 2.350(3) | 0.0039 d | 0.1 | 0.011 |
Ru-O | 2.0(1) | 2.065(7) | 0.0014 d | |||
3.0 M | Ru-Cl | 4.3(1) | 2.351(3) | 0.0039 d | 0.2 | 0.010 |
Ru-O | 1.7(1) | 2.062(8) | 0.0014 d | |||
5.0 M | Ru-Cl | 5.4(1) | 2.367(2) | 0.0039 d | 0.7 | 0.007 |
Ru-O | 0.6(1) | 2.10(1) | 0.0014 d | |||
7.0 M | Ru-Cl | 5.7(1) | 2.374(2) | 0.0039 d | 2.3 | 0.009 |
Ru-O | 0.3(1) | 2.13(3) | 0.0014 d | |||
10 M | Ru-Cl | 6.0 | 2.371(2) | 0.0039(2) | 1.3 | 0.009 |
[RuCl6]3– e | Ru-Cl | 6 | 2.378 g | |||
[Ru(H2O)6]3+ f | Ru-O | 6 | 2.029 |
Sample | Path | N a | R (Å) | σ2 (Å2) | ΔE (eV) | R-Factor |
---|---|---|---|---|---|---|
EHBAA phase | Ru-Cl | 4.7(2) | 2.370(3) | 0.0036(3) | 3.3 | 0.016 |
Ru-O | 1.3(2) | 2.20(1) | 0.0010 b |
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Suzuki, T.; Ogata, T.; Tanaka, M.; Kobayashi, T.; Shiwaku, H.; Yaita, T.; Narita, H. Speciation of Ruthenium(III) Chloro Complexes in Hydrochloric Acid Solutions and Their Extraction Characteristics with an Amide-Containing Amine Compound. Metals 2018, 8, 558. https://doi.org/10.3390/met8070558
Suzuki T, Ogata T, Tanaka M, Kobayashi T, Shiwaku H, Yaita T, Narita H. Speciation of Ruthenium(III) Chloro Complexes in Hydrochloric Acid Solutions and Their Extraction Characteristics with an Amide-Containing Amine Compound. Metals. 2018; 8(7):558. https://doi.org/10.3390/met8070558
Chicago/Turabian StyleSuzuki, Tomoya, Takeshi Ogata, Mikiya Tanaka, Tohru Kobayashi, Hideaki Shiwaku, Tsuyoshi Yaita, and Hirokazu Narita. 2018. "Speciation of Ruthenium(III) Chloro Complexes in Hydrochloric Acid Solutions and Their Extraction Characteristics with an Amide-Containing Amine Compound" Metals 8, no. 7: 558. https://doi.org/10.3390/met8070558