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Peroutka AA, Wang X, Servis MJ, Shafer JC. Influence of Aqueous Phase Acidity on Ln(III) Coordination by N, N, N', N'-Tetraoctyldiglycolamide. Inorg Chem 2024; 63:10466-10470. [PMID: 38768519 DOI: 10.1021/acs.inorgchem.4c01006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
This study highlights the importance of combining distribution ratio measurements with multiple spectroscopic techniques to provide a more comprehensive understanding of organic phase Ln coordination chemistry. Solvent extraction investigations with N,N,N',N'-tetraoctyldiglycolamide (TODGA) in n-heptane reveal the sensitivity of Ln complexation to the HNO3 concentration. Distribution ratio measurements in tandem with UV-Vis demonstrated that increasing the concentration of HNO3 above 0.5 M with a constant NO3- of 1 M increases the number of coordinating TODGA molecules, from a 1:2 to a 1:3 Ln:TODGA complex. At each concentration of HNO3 considered herein (from 0.01 to 1 M), Eu lifetime analysis demonstrated no evidence of H2O coordination. Results from Fourier transform infrared investigations suggest the presence of inner-sphere NO3- under low concentrations of HNO3 when the 1:2 Ln:TODGA complex is present. Increasing the HNO3 concentration above 0.5 M increases the propensity for outer-sphere interactions by removing the coordinated NO3- and saturating the Ln coordination sphere with three TODGA molecules, resulting in the well-established cationic, trischelate homoleptic [Ln(TODGA)3]3+ complex. This work demonstrates the importance in considering the NO3- source for solvent extraction systems. In particular, for systems with an affinity for outer-sphere interactions with molar concentrations of HNO3, changing the NO3- source can change the inner-sphere coordination of the Ln complex, which, in turn, affects the separation efficacy.
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Affiliation(s)
- Allison A Peroutka
- Department of Chemistry, Colorado School of Mines, 1500 Illinois Street, Golden, Colorado 80401, United States
| | - Xiaoyu Wang
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439, United States
| | - Michael J Servis
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439, United States
| | - Jenifer C Shafer
- Department of Chemistry, Colorado School of Mines, 1500 Illinois Street, Golden, Colorado 80401, United States
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Peroutka AA, Galley SS, Shafer JC. Elucidating the speciation of extracted lanthanides by diglycolamides. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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3
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Peroutka AA, Galley SS, Shafer JC. A multi-faceted approach to probe organic phase composition in TODGA systems with 1-alcohol phase modifiers. RSC Adv 2023; 13:6017-6026. [PMID: 36814872 PMCID: PMC9939940 DOI: 10.1039/d2ra07786h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 02/09/2023] [Indexed: 02/22/2023] Open
Abstract
The effect of varying 1-alcohol alkyl chain length on extraction of lanthanides (Lns), H2O, and H+ was studied with tetraoctyl diglycolamide (TODGA) via solvent extraction coupled with FT-IR investigations. This multi-faceted approach provided understanding regarding the relationship between extracted Lns, H2O and H+, 1-alcohol volume fraction, and 1-alcohol alkyl chain length. Under acidic conditions there is competition with 1-alcohols and their ability to solubilize aggregates and incidentally induce third phase formation by increasing the extraction of H2O. At low 1-alcohol concentrations (5 vol%), the trend for 1-alcohol alkyl lengths in solubilizing the aggregates is 1-hexanol > 1-octanol > 1-decanol. Shorter alkyl chains suppress aggregation, ultimately resulting in lower H2O concentrations and less available TODGA to hydrogen bond with H+. Increasing the 1-alcohol concentration to 30 vol% results in the opposite trend, with longer alkyl chains suppressing aggregation. These results suggest this approach is effective at probing trends in the organic phase micro-structure, and indicates trends across the Ln period with various 1-alcohol alkyl chain lengths are a function of outer-sphere coordination.
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Affiliation(s)
| | - Shane S. Galley
- Department of Chemistry, Colorado School of MinesGoldenCOUSA
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Turanov AN, Karandashev VK, Khvostikov VA, Tcarkova KV, Sharova EV, Artyushin OI, Bondarenko NA. Extraction of REE(III), U(VI), and Th(IV) with Bis[N-alkyl-N-(2-diphenylphosphinylethyl)]diglycolamides from Nitric Acid Solutions. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622601416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Rout A, Kumar S, Ramanathan N. Effect of TBP on the Coordination Process of Eu(III) with T2EHDGA: A Luminescence Spectroscopy Investigation. ChemistrySelect 2022. [DOI: 10.1002/slct.202202799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alok Rout
- Materials Chemistry & Metal Fuel Cycle Group Indira Gandhi Centre for Atomic Research Kalpakkam 603102 India
| | - Satendra Kumar
- Materials Chemistry & Metal Fuel Cycle Group Indira Gandhi Centre for Atomic Research Kalpakkam 603102 India
- Homi Bhabha National Institute Training School Complex, Anushakti Nagar Mumbai 400094 India
| | - Nagarajan Ramanathan
- Materials Chemistry & Metal Fuel Cycle Group Indira Gandhi Centre for Atomic Research Kalpakkam 603102 India
- Homi Bhabha National Institute Training School Complex, Anushakti Nagar Mumbai 400094 India
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Turanov AN, Karandashev VK, Yarkevich AN, Baulin DV, Baulin VE. Influence of the Structure of (О-Phenylenoxymethylene)diphosphine Dioxides on Their Extraction Ability to U(VI), Th(IV), and REE(III) in Nitric Acid Media. RADIOCHEMISTRY 2022. [DOI: 10.1134/s1066362222010039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Špadina M, Dufrêche JF, Pellet-Rostaing S, Marčelja S, Zemb T. Molecular Forces in Liquid-Liquid Extraction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:10637-10656. [PMID: 34251218 DOI: 10.1021/acs.langmuir.1c00673] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The phase transfer of ions is driven by gradients of chemical potentials rather than concentrations alone (i.e., by both the molecular forces and entropy). Extraction is a combination of high-energy interactions that correspond to short-range forces in the first solvation shell such as ion pairing or complexation forces, with supramolecular and nanoscale organization. While the latter are similar to the long-range solvent-averaged interactions in the colloidal world, in solvent extraction they are associated with lower characteristic lengths of the nanometric domain. Modeling of such complex systems is especially complicated because the two domains are coupled, whereas the resulting free energy of extraction is around kBT to guarantee the reversibility of the practical process. Nevertheless, quantification is possible by considering a partitioning of space among the polar cores, interfacial film, and solvent. The resulting free energy of transfer can be rationalized by utilizing a combination of terms which represent strong complexation energies, counterbalanced by various entropic effects and the confinement of polar solutes in nanodomains dispersed in the diluent, together with interfacial extractant terms. We describe here this ienaics approach in the context of solvent extraction systems; it can also be applied to further complex ionic systems, such as membranes and biological interfaces.
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Affiliation(s)
- Mario Špadina
- Group for Computational Life Sciences, Rud̵er Bošković Institute, Division of Physical Chemistry, 10000 Zagreb, Croatia
- Faculty of Health Sciences, University of Ljubljana, 1000 Ljubljana, Slovenia
| | | | | | - Stjepan Marčelja
- Research School of Physics, The Australian National University, Canberra, Australia
| | - Thomas Zemb
- ICSM, CEA, CNRS, ENSCM, Université Montpellier, Marcoule, France
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Ta AT, Golzwarden JVA, Jensen MP, Vyas S. Behaviors of ALSEP Organic Extractants: an Atomic Perspective Derived from Molecular Dynamics Simulation. SOLVENT EXTRACTION AND ION EXCHANGE 2021. [DOI: 10.1080/07366299.2021.1956104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- An T. Ta
- Department of Chemistry, Colorado School of Mines, Golden, Colorado, United States
| | | | - Mark P. Jensen
- Department of Chemistry, Colorado School of Mines, Golden, Colorado, United States
- Nuclear Science and Engineering Program, Colorado School of Mines, Golden, Colorado, United States
| | - Shubham Vyas
- Department of Chemistry, Colorado School of Mines, Golden, Colorado, United States
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Turanov AN, Karandashev VK, Baulin VE, Baulin DV. Effect of Phosphonium Ionic Liquids on the Extraction of
Rare-Earth Elements(III) with 2,2′-Oxybis(N,N-dioctylacetamide) from Nitric Acid
Solutions. RUSS J GEN CHEM+ 2021. [DOI: 10.1134/s1070363221050157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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McCann KP, Jones MA, Kyser EA, Smith TE, Bridges NJ. Scaling Trivalent Actinide and Lanthanide Recovery by Diglycolamide Resin from Savannah River Site’s Mark-18A Targets. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c03897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kevin P. McCann
- Savannah River National Laboratory, Aiken, South Carolina 29808, United States
| | - Mark A. Jones
- Savannah River National Laboratory, Aiken, South Carolina 29808, United States
| | - Edward A. Kyser
- Savannah River National Laboratory, Aiken, South Carolina 29808, United States
| | - Tara E. Smith
- Savannah River Site, Aiken, South Carolina 29808, United States
| | - Nicholas J. Bridges
- Savannah River National Laboratory, Aiken, South Carolina 29808, United States
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Verma PK, Mohapatra PK, Yadav AK, Jha SN, Bhattacharyya D, Leoncini A, Huskens J, Verboom W. Role of diluent in the unusual extraction of Am 3+ and Eu 3+ ions with benzene-centered tripodal diglycolamides: local structure studies using luminescence spectroscopy and XAS. NEW J CHEM 2021. [DOI: 10.1039/d1nj02594e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two benzene-centered tripodal DGA ligands (LI and LII) were used for the extraction of Am3+/Eu3+ from HNO3 medium into n-dodecane modified with various amounts of isodecanol. Luminescence spectroscopy and EXAFS studies were carried out for structural information.
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Affiliation(s)
- Parveen K. Verma
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | | | - Ashok K. Yadav
- Applied Molecular and Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Shambhu N. Jha
- Applied Molecular and Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Dibyendu Bhattacharyya
- Applied Molecular and Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Andrea Leoncini
- Laboratory of Molecular Nanofabrication, MESA + Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Jurriaan Huskens
- Laboratory of Molecular Nanofabrication, MESA + Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Willem Verboom
- Laboratory of Molecular Nanofabrication, MESA + Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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Rout A, Vinodkumar P, Shankar Panigrahi B. Europium(III) Coordination in a Combined Ligand System: A Luminescence Spectroscopy Study. ChemistrySelect 2020. [DOI: 10.1002/slct.202002046] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alok Rout
- Fuel Chemistry Division Indira Gandhi Centre for Atomic Research Kalpakkam 603102 India
| | - Patchapureddy Vinodkumar
- Homi Bhabha National Institute Training School Complex, Anushakti Nagar, Luminescence Programme, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India Mumbai 400094 India
| | - Bhavani Shankar Panigrahi
- Homi Bhabha National Institute Training School Complex, Anushakti Nagar, Luminescence Programme, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India Mumbai 400094 India
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Synthesis and characterization of new unsymmetrical diglycolamide extractants for lanthanide ion partitioning: part one—straight-chain alkyl derivatives. J Radioanal Nucl Chem 2020. [DOI: 10.1007/s10967-020-07368-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Turanov AN, Karandashev VK, Baulin DV, Baulin VE. Extraction of Uranium(VI), Thorium(IV), and Trivalent Rare Earths from Nitric Acid Solutions with {[2-(2-Diphenylphosphoryl)-4-ethylphenoxy]ethyl}diphenylphosphine Oxide. RUSS J GEN CHEM+ 2020. [DOI: 10.1134/s1070363220060122] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Picayo G, Etz BD, Vyas S, Jensen MP. Characterization of the ALSEP Process at Equilibrium: Speciation and Stoichiometry of the Extracted Complex. ACS OMEGA 2020; 5:8076-8089. [PMID: 32309717 PMCID: PMC7161052 DOI: 10.1021/acsomega.0c00209] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 03/18/2020] [Indexed: 06/11/2023]
Abstract
We have determined the identity of the complexes extracted into the ALSEP process solvent from solutions of nitric acid. The ALSEP process is a new solvent extraction separation designed to separate americium and curium from trivalent lanthanides in irradiated nuclear fuel. ALSEP employs a mixture of two extractants, 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (HEH[EHP]) and N,N,N',N'-tetra(2-ethylhexyl)diglycolamide (TEHDGA) in n-dodecane, which makes it difficult to ascertain the nature of the extracted metal complexes. It is often asserted that the weak acid extractant HEH[EHP] does not participate in the extracted complex under ALSEP extraction conditions (2-4 M HNO3). However, the analysis of the Am extraction equilibria, Nd absorption spectra, and Eu fluorescence emission spectra of metal-loaded organic phases argues for the participation of HEH[EHP] in the extracted complex despite the high acidity of the aqueous phases. The extracted complex was determined to contain fully protonated molecules of HEH[EHP] with an overall stoichiometry of M(TEHDGA)2(HEH[EHP])2·3NO3. Computations also demonstrate that replacing one TEHDGA molecule with one (HEH[EHP])2 dimer is likely energetically favorable compared to Eu(TEHDGA)3·3NO3, whether the HEH[EHP] dimer is monodentate or bidentate.
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Affiliation(s)
- Gabriela
A. Picayo
- Chemistry
Department, Colorado School of Mines, 1012 14th St, Golden, Colorado 80401, United States
| | - Brian D. Etz
- Chemistry
Department, Colorado School of Mines, 1012 14th St, Golden, Colorado 80401, United States
| | - Shubham Vyas
- Chemistry
Department, Colorado School of Mines, 1012 14th St, Golden, Colorado 80401, United States
| | - Mark P. Jensen
- Chemistry
Department, Colorado School of Mines, 1012 14th St, Golden, Colorado 80401, United States
- Nuclear
Science and Engineering Program, Colorado
School of Mines, 920 15th St, Golden, Colorado 80401, United States
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Hall GB, Holfeltz VE, Campbell EL, Boglaienko D, Lumetta GJ, Levitskaia TG. Evolution of Acid-Dependent Am3+ and Eu3+ Organic Coordination Environment: Effects on the Extraction Efficiency. Inorg Chem 2020; 59:4453-4467. [DOI: 10.1021/acs.inorgchem.9b03612] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gabriel B. Hall
- Nuclear Chemistry and Engineering Group, Pacific Northwest National Laboratory (PNNL), Richland, Washington 99352, United States
| | - Vanessa E. Holfeltz
- Nuclear Chemistry and Engineering Group, Pacific Northwest National Laboratory (PNNL), Richland, Washington 99352, United States
| | - Emily L. Campbell
- Nuclear Chemistry and Engineering Group, Pacific Northwest National Laboratory (PNNL), Richland, Washington 99352, United States
| | - Daria Boglaienko
- Nuclear Chemistry and Engineering Group, Pacific Northwest National Laboratory (PNNL), Richland, Washington 99352, United States
| | - Gregg J. Lumetta
- Nuclear Chemistry and Engineering Group, Pacific Northwest National Laboratory (PNNL), Richland, Washington 99352, United States
| | - Tatiana G. Levitskaia
- Nuclear Chemistry and Engineering Group, Pacific Northwest National Laboratory (PNNL), Richland, Washington 99352, United States
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