1
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Verma PK, Bhattacharyya A, Samanta S, Mohapatra PK. A highly efficient in situ redox stabilization strategy for Am-Cm separation using AgBiO 3. Dalton Trans 2024. [PMID: 39078269 DOI: 10.1039/d4dt01650e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/31/2024]
Abstract
AgBiO3 is reported for the exclusive oxidation of Am3+ → AmO2+ at near-neutral pH conditions. Literature methods of AmO2+ generation are generally two-step processes; i.e., Am3+ → AmO22+ oxidation followed by AmO22+ → AmO2+ reduction. These methods for Am3+ → AmO2+ oxidation use high temperatures (80-100 °C) and/or several reagents, causing the in situ presence of the AmO2+-complex rather than the AmO2+aq ions. This not only interferes with the much-needed Am-Cm selectivity but also limits the use of AmO2+aq in any other experimental study. The single-step Am3+ → AmO2+ oxidation in the present work using AgBiO3 is done at 25 °C in a non-complexing medium at pH ∼4, making it a first-of-its-kind report. Am-Eu and Am-Cm separation in a single contact, with a separation factor >104, was achieved using the present method, which is unprecedented among aqueous feed solutions. The AmO2+ generated using the present method under non-complexing pH conditions makes it also suitable for exploring the fundamental chemistry of the higher valent americyl ion. A complexation study using the thus-generated AmO2+ ion with acetate ion supports the concept.
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Affiliation(s)
- Parveen K Verma
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India.
| | | | - Soumen Samanta
- Technical Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India
| | - Prasanta K Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India.
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2
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Walker L, Heath SL, Jiang J, Natrajan LS, Livens FR. Oligomer Formation Effects on the Separation of Trivalent Lanthanide Fission Products. Inorg Chem 2024; 63:13380-13391. [PMID: 38986132 PMCID: PMC11270979 DOI: 10.1021/acs.inorgchem.4c01272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 06/19/2024] [Accepted: 06/21/2024] [Indexed: 07/12/2024]
Abstract
The assessment of trivalent lanthanide yields from the fission of uranium-235 is currently achieved using LN (LaNthanide) resin, di(2-ethylhexyl)orthophosphoric acid immobilized on a solid support. However, coelution of lighter lanthanides into terbium (Tb3+) fractions remains a significant problem in recovery of analytically pure fractions. In order to understand how the separation of trivalent lanthanides and yttrium (Ln3+) with LN resin proceeds and how to improve it, their speciation with the organic extractant HDEHP must be fully understood under aqueous conditions. A comprehensive luminescence analysis of aqueous solutions of Ln3+ in contact with HDEHP, along with infrared spectroscopy, elemental combustion analysis, inductively coupled plasma atomic emission spectroscopy (ICP-AES), and mass spectrometry, was used to indicate that an intermediate species is responsible for the coelution; where similar Ln3+ centers (e.g., Eu3+ and Tb3+) are bridged by the O-P-O moiety of deprotonated HDEHP to form large heteronuclear oligomeric structures with the general formula [Ln2(DEHP)6]n. Energy transfer from Tb3+ to Eu3+ in this structure confirms that lanthanide centers are within 10 Å and was used to propose that the oligomeric [Ln2(DEHP)6]n structure is formed rather than a dimeric Ln2(DEHP)6 structure. The effect of this speciation on LN resin column elution is investigated using luminescence spectroscopy, confirming that the oligomeric [Ln2(DEHP)6]n species could disrupt regular elution behavior and cause the problematic bleeding of lighter lanthanides (Sm3+ and Eu3+) into Tb3+ fractions. Resin luminescence measurements were used to propose that the bleeding of the organic extractant HDEHP from its solid support causes the formation of the disruptive oligometallic species.
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Affiliation(s)
- Lauren
E. Walker
- Department
of Chemistry, Faculty of Science and Engineering, The University of Manchester, Manchester M13 9PL, U.K.
| | - Scott L. Heath
- Department
of Earth and Environmental Sciences, The
University of Manchester, Manchester M13 9PL, U.K.
| | | | - Louise S. Natrajan
- Department
of Chemistry, Faculty of Science and Engineering, The University of Manchester, Manchester M13 9PL, U.K.
| | - Francis R. Livens
- Department
of Chemistry, Faculty of Science and Engineering, The University of Manchester, Manchester M13 9PL, U.K.
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3
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Gujar RB, Kanekar AS, Bhattacharyya A, Karthikeyan NS, Ravichandran C, Toleti SR, Egberink RJM, Huskens J, Verboom W, Mohapatra PK. Remarkable Improvement in Am 3+ and Cm 3+ Separation Using a Cooperative Counter Selectivity Strategy by a Combination of Branched Diglycolamides and Hydrophilic Polyaza-heterocycles. Inorg Chem 2024; 63:11649-11659. [PMID: 38861395 DOI: 10.1021/acs.inorgchem.4c01081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
Separation of Am3+ and Cm3+ is one of the most challenging problems in the back-end of the nuclear fuel cycle. In the present work, we exploited the cooperative effect of the opposite selectivity of hydrophobic branched DGA derivatives and hydrophobic N-donor heterocyclic ligands taken in two different phases to achieve improved separation behavior. A systematic study was performed using a series of DGA derivatives to understand the effect and the position of branching in the alkyl chains on the separation behavior of Am3+ and Cm3+. A separation factor (S.F.) value as high as 10 for Cm3+ over Am3+ was obtained in the case of TiBDGA (N,N,N',N'-tetra-iso-butyl diglycolamide) using SO3PhBTPhen ((phenanthroline-2,9-diyl)-1,2,4-triazine-5,5,6,6-tetrayltetrabenzenesulfonic acid) as the aqueous complexant, which is the highest reported value so far for the ligand-based separation of Am3+ and Cm3+ without involving any oxidation or reduction step. The high selectivity favoring Cm3+ ion extraction in the case of this DGA derivative is also explained with the help of computational studies.
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Affiliation(s)
- Rajesh B Gujar
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Avinash S Kanekar
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | | | | | | | - Subba Rao Toleti
- School of Arts and Sciences, Sai University, Chennai 603104, India
| | - Richard J M Egberink
- Molecular Nanofabrication Group, MESA+ Institute of Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Jurriaan Huskens
- Molecular Nanofabrication Group, MESA+ Institute of Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Willem Verboom
- Molecular Nanofabrication Group, MESA+ Institute of Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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4
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Tarlton M, Carpenter SH, Tondreau AM. Alkyl Coordination in meso-(ONO) 2- Supported Uranium(IV) Complexes. Organometallics 2024; 43:1329-1333. [PMID: 38938898 PMCID: PMC11203667 DOI: 10.1021/acs.organomet.4c00069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 04/25/2024] [Accepted: 05/10/2024] [Indexed: 06/29/2024]
Abstract
A series of U(IV) complexes bearing alkyl and chloride ligands in the trans configuration was synthesized and characterized. Starting with the diastereopure U(IV) trans-dichloride complex meso-( tBu2PONO)UCl2(dtbpy) (1, tBu2PONO = 2,6-bis((di-tert-butylphosphino)methanolato)pyridine), four distinct alkyl groups were employed to prepare ( tBu2PONO)U(R)Cl(dtbpy), where R = (trimethylsilyl)methyl (neosilyl), 2a, R = 2,2-dimethyl propyl (neopentyl), 2b, and R = 2-methyl-2-phenyl propyl (neophyl), 2c. Alkylation occurs with specificity but generates a predominant species and a minor species corresponding to anti/syn regioisomers relative to the tBu2P groups of the ligand. For synthesis using R = methyl, the dimethyl complex ( tBu2PONO)U(Me)2(dtbpy), 2d, was prepared; the addition of 1 equiv of MeLi produced a mixture of products. Complexes 2a-2d were characterized using single crystal X-ray diffraction (SC-XRD), UV-vis-nIR, and 1H and 31P NMR spectroscopies.
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Affiliation(s)
- Michael
L. Tarlton
- Los Alamos National Laboratory, Los Alamos, New Mexico 87544, United States
| | | | - Aaron M. Tondreau
- Los Alamos National Laboratory, Los Alamos, New Mexico 87544, United States
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5
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Ansari SA, Bhattacharyya A, Mohapatra PK, Verma PK, Urkude RR, Egberink RJM, Verboom W. Understanding the Complexation of Alkyl-Substituted Nitrilotriacetamides with Uranium: A Study by Absorption Spectroscopy and Microcalorimetry. Inorg Chem 2024; 63:11270-11278. [PMID: 38842429 DOI: 10.1021/acs.inorgchem.4c01123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
Complexation thermodynamics of UO22+ ions with a series of alkyl-substituted nitrilotriacetamides (NTA) was investigated by absorption spectroscopy and microcalorimetry. The hexamethyl derivative of NTA (HMNTA) forms the weakest two successive complexes with UO22+ ions with stability constants of log β11 = 3.5 ± 0.1 and log β12 = 6.1 ± 0.1. The formation constant values increased linearly with increasing alkyl chain length of the substituents from hexamethyl NTA to hexabutyl NTA (HBNTA) and to hexahexyl NTA (HHNTA). The complexation with each ligand was both enthalpy and entropy driven with exothermic enthalpy changes of ΔH11 = -14.7 ± 1.0 kJ/mol, ΔH12 = -10.2 ± 0.8 kJ/mol for HMNTA, ΔH11 = -19.2 ± 1.2 kJ/mol, ΔH12 = -16.4 ± 1.1 kJ/mol for HBNTA, and ΔH11 = -21.3 ± 1.4 kJ/mol, ΔH12 = -19.4 ± 2.3 kJ/mol for HHNTA. Similarly, the positive entropy changes with each ligand were ΔS11 = 18.1 ± 2.7 J/mol/K, ΔS12 = 82.9 ± 3.8 J/mol/K for HMNTA, ΔS11 = 14.4 ± 1.2 J/mol/K, ΔS12 = 87.2 ± 4.2 J/mol/K for HBNTA, and ΔS11 = 16.1 ± 2.4 J/mol/K, ΔS12 = 92.6 ± 3.1 J/mol/K for HHNTA. Structural features of the complex suggest the participation of two ligands coordinating in a bidentate mode via the carbonyl oxygens. The [UO2L2]2+ complexes appear to be noncentrosymmetric with two ligands and one water molecule occupying the equatorial plane of the dioxo uranyl cation. The structure of the complex was confirmed by 1H NMR titration, EXAFS measurements, and DFT calculations.
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Affiliation(s)
- Seraj A Ansari
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | | | | | - Parveen K Verma
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Rajashri R Urkude
- Beamline Development and Application Section, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Richard J M Egberink
- Laboratory of Molecular Nanofabrication, Department of Molecules & Materials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Willem Verboom
- Laboratory of Molecular Nanofabrication, Department of Molecules & Materials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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6
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Fletcher LS, Tedder ML, Olayiwola SO, Carrick JD. A hydrolytically stable complexant for minor An separation from Ln in process relevant diluents. Chem Commun (Camb) 2024; 60:5642-5645. [PMID: 38722150 DOI: 10.1039/d4cc00983e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2024]
Abstract
The evaluation of bis-1,2,4-triazine complexants containing eight-carbon, alkoxy-functionalized phenyl substituents at the 3,3'-positions for selective minor actinide extraction in simulated high level waste is reported. The complexant retained chemoselective extraction efficiency of actinides over lanthanides while breaking through the nonpolar diluent solubility and hydrolytic stability barriers that limit many BTP complexants. Thus, we report a BTP complexant that is readily soluble in both kerosene and isooctanol without forming precipitates, emulsions, or third phase after contact with nitric acid and extracts 241Am3+ from 154Eu3+. Separations and spectroscopic data are reported herein.
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Affiliation(s)
- Lesta S Fletcher
- Department of Chemistry, Tennessee Technological University, Cookeville, TN 38505-0001, USA.
| | - Mariah L Tedder
- Department of Chemistry, Tennessee Technological University, Cookeville, TN 38505-0001, USA.
| | - Samiat O Olayiwola
- Department of Chemistry, Tennessee Technological University, Cookeville, TN 38505-0001, USA.
| | - Jesse D Carrick
- Department of Chemistry, Tennessee Technological University, Cookeville, TN 38505-0001, USA.
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7
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Gomez Martinez D, Sperling JM, Beck NB, Wineinger HB, Brannon JP, Whitefoot MA, Horne GP, Albrecht-Schönzart TE. Comparison of Americium(III) and Neodymium(III) Monothiophosphate Complexes. Inorg Chem 2024; 63:9237-9244. [PMID: 38722713 DOI: 10.1021/acs.inorgchem.4c00869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2024]
Abstract
Mixed-donor ligands, such as those containing a combination of O/N or O/S, have been studied extensively for the selective extraction of trivalent actinides, especially Am3+ and Cm3+, from lanthanides during the recycling of used nuclear fuel. Oxygen/sulfur donor ligand combinations also result from the hydrolytic and/or radiolytic degradation of dithiophosphates, such as the Cyanex class of extractants, which are initially converted to monothiophosphates. To understand potential differences between the binding of such degraded ligands to Nd3+ and Am3+, the monothiophosphate complexes [M(OPS(OEt)2)5(H2O)2]2- (M3+ = Nd3+, Am3+) were prepared and characterized by single-crystal X-ray diffraction and optical spectroscopy and studied as a function of pressure up to ca. 14 GPa using diamond-anvil techniques. Although Nd3+ and Am3+ have nearly identical eight-coordinated ionic radii, these structures reveal that while the M-O bond distances in these complexes are almost equal, the M-S distances are statistically different. Moreover, for [Nd(OPS(OEt)2)5(H2O)2]2-, the hypersensitive 4I9/2 → 4G5/2 transition shifts as a function of pressure by -11 cm-1/GPa. Whereas for [Am(OPS(OEt)2)5(H2O)2]2-, the 7F0 → 7F6 transition shows a slightly stronger pressure dependence with a shift of -13 cm-1/GPa and also exhibits broadening of the 5f → 5f transitions at high pressures. These data likely indicate an increased involvement of the 5f orbitals in bonding with Am3+ relative to that of Nd3+ in these complexes.
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Affiliation(s)
- Daniela Gomez Martinez
- Department of Chemistry and Nuclear Science and Engineering Center, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Joseph M Sperling
- Department of Chemistry and Nuclear Science and Engineering Center, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Nicholas B Beck
- Department of Chemistry and Nuclear Science and Engineering Center, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Hannah B Wineinger
- Department of Chemistry and Nuclear Science and Engineering Center, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Jacob P Brannon
- Department of Chemistry and Nuclear Science and Engineering Center, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Megan A Whitefoot
- Department of Chemistry and Nuclear Science and Engineering Center, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Gregory P Horne
- Center for Radiation Chemistry Research, Idaho National Laboratory, Idaho Falls, P.O. Box 1625, Idaho 83415, United States
| | - Thomas E Albrecht-Schönzart
- Department of Chemistry and Nuclear Science and Engineering Center, Colorado School of Mines, Golden, Colorado 80401, United States
- Center for Radiation Chemistry Research, Idaho National Laboratory, Idaho Falls, P.O. Box 1625, Idaho 83415, United States
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8
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Jennifer G A, Schreckenbach G, Varathan E. Computational study of core modified dipyriamethyrin for the competitive complexation of Am 3+/Cm 3+ from their trichlorides. Dalton Trans 2024; 53:7899-7911. [PMID: 38635067 DOI: 10.1039/d4dt00395k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
In the process of handling and storage of radioactive actinides it is essential to selectively sequester the minor actinides, such as Am and Cm, through a competitive complexation process. Herein we computationally designed two core modified ligands (L21- and L3) through systematic oxygen substitution at the NH sites of dipyriamethyrin (L1_2H), a hexadentate expanded porphyrin, and studied their competitive complexation towards trivalent actinides (An = Am/Cm) from their trichlorides using density functional theory (DFT). We observed shorter An-N bonds and longer An-O bonds in complexes based on core modified ligands (L21- and L3). The An-Cl bond length increases with increasing axial coordination number (i.e., from L12- to L3) to accommodate the ligands. All the bonds were identified to be electrostatic in nature. L12- exhibits shorter bonds and larger bond orders on complexing with Am than with Cm. On moving from complexes of L21- to L3, the An-N bond lengths are shortened, while An-O bond lengths become larger. Between the complexes of Am and Cm, there is marginal difference in their bond distances with L21- and L3. Charge analysis shows ligand to metal charge transfer during coordination, with back-donation from An to N/O and Cl. The calculated spin-density analysis indicates that An remains in its trivalent oxidation state on complexation, while orbital occupation analysis shows that the 5f and 6d orbitals are involved in bonding; this was confirmed by molecular orbital (MO) analysis that shows the complexes of L21- and L3 to exhibit higher degeneracy in their overlapping MOs. Further, the energy decomposition analysis (EDA) confirms that all ionic bonds are primarily due to electrostatic contributions, where the orbital contributions increase from L12- to L3 complexes and maximum covalency was observed in Cm complexes due to the energy matching between the 5f orbitals of Cm and the 2p orbitals of N and Cl, compared to Am. To confirm the competitiveness in the complexation of the ligand towards Am vs. Cm, the thermodynamic parameters were analysed for the ligand and metal substitution reactions. L12- shows more affinity towards Am than Cm, while L21- and L3 prefer Cm.
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Affiliation(s)
- Abigail Jennifer G
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, Tamil Nadu, India.
| | - Georg Schreckenbach
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada
| | - Elumalai Varathan
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, Tamil Nadu, India.
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9
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Rama Swami K, Parvathy N, Jennifer G A, Gardas RL, Varathan E. Elucidation of the extraction of trivalent actinides using the DOHyA-HDEHP system: an experimental and theoretical approach. Phys Chem Chem Phys 2024; 26:13279-13286. [PMID: 38639080 DOI: 10.1039/d4cp01012d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
A combined solvent system composed of an acidic and a neutral extractant is demonstrated as an effective system for the mutual separation of lanthanides and actinides from nitric acid solutions. The geometry and stability of various possible complexes formed under extraction and stripping conditions in a combined solvent system composed of N,N-dioctyl hydroxyacetamide (DOHyA) and bis(2-ethylhexyl)phosphoric acid (HDEHP) in the n-dodecane medium were studied both experimentally and theoretically. Experimental observations of the distribution ratios of Am(III) and Eu(III) in the combined solvent system revealed synergistic extraction of trivalent metal ions at all nitric acid concentrations. Density functional theory (DFT) calculations were employed to understand the geometric and electronic properties of the ligands and their corresponding complexes with Am(III) and Eu(III). The calculated results indicate that the feasibility and behaviour of complex formation in the combined solvent system using different methods are based on the energetic aspects of the formation reactions. The study also reveals the participation of the neutral and acid extractants in the combined solvent system facilitating the separation of Eu(III) and Am(III) from high-level liquid waste.
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Affiliation(s)
- K Rama Swami
- Department of Chemistry, Indian Institute of Technology, Madras, Tamil Nadu, India.
| | - N Parvathy
- Process Radiochemistry Reprocessing Research and Development Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India
| | - Abigail Jennifer G
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Tamil Nadu, India.
| | - Ramesh L Gardas
- Department of Chemistry, Indian Institute of Technology, Madras, Tamil Nadu, India.
| | - Elumalai Varathan
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Tamil Nadu, India.
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10
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Chen YM, Wang CZ, Zhang L, Wu QY, Lan JH, Chai ZF, Shi WQ. Theoretical insights into selective extraction of Am(III) from Cm(III) and Eu(III) with asymmetric N-heterocyclic ligands. Dalton Trans 2024; 53:7406-7413. [PMID: 38587851 DOI: 10.1039/d3dt03965j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Separation of lanthanide (Ln) and minor actinide (MA) elements and mutual separation between minor actinide elements (e.g. Am(III) and Cm(III)) represent a crucial undertaking. However, separating these elements poses a significant challenge owing to their highly similar physicochemical properties. Asymmetric N-heterocyclic ligands such as N-ethyl-6-(1H-pyrazol-3-yl)-N-(p-tolyl)picolinamide (Et-p-Tol-A-PzPy) and N-ethyl-N-(p-tolyl)-1,10-phenanthroline-2-carboxamide (ETPhenAm) have recently received considerable attention in the separation of MAs over Ln from acid solutions. By changing the central skeleton structures of these ligands and introducing substituents with different properties on the side chains, their complexation behavior with Am(III), Cm(III), and Eu(III) may be affected. In this work, we explore four different asymmetric N-containing heterocyclic ligands, namely Et-p-Tol-A-PzPy (L1), N-ethyl-6'-(1H-pyrazol-3-yl)-N-(p-tolyl)-[2,2'-bipyridine]-6-carboxamide (L2), N-ethyl-9-(1H-pyrazol-3-yl)-N-(p-tolyl)-1,10-phenanthroline-2-carboxamide (L3), and ETPhenAm (L4) using density functional theory (DFT). The calculated results demonstrate the potential of ligands L1-L4 for the extraction and separation of Am(III), Cm(III), and Eu(III). Ligand analysis shows that ligand L3 binds more easily to the central metal atom, in line with the stronger extraction capacity of L3. In spite of the higher covalence between the side chain and the central metal atom for complexes with L1-L3, the main chain seems to control the stability of the extraction complexes. The preorganized 1,10-phenanthroline backbone also further enhances the extraction performance of L3 and L4. The difference in coordination ability between the side chain donors of these ligands and metal ions may affect their separation efficiency. This work presents theoretical insights into synthesizing novel ligands for separating trivalent actinides by adjusting N-heterocyclic ligands.
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Affiliation(s)
- Yan-Mei Chen
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, China
| | - Cong-Zhi Wang
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
| | - Lei Zhang
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, China
| | - Qun-Yan Wu
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
| | - Jian-Hui Lan
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
| | - Zhi-Fang Chai
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, China
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
| | - Wei-Qun Shi
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
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11
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Pu N, Archer E, He X, Chen J, Rao L, Shafer JC, Yang P, Xu C. Tuning Selectivity to f-Elements through Bonding and Solvation Effects of a Sulfur Donor Ligand. Inorg Chem 2024; 63:6845-6853. [PMID: 38568878 DOI: 10.1021/acs.inorgchem.4c00297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
Bis(2,4,4-trimethylpentyl)dithiophosphinic acid, commonly referred to as HBTMPDTP or Cyanex301, is a sulfur-donating ligand that shows considerable promise in the challenging task of separating trivalent actinides (An3+) from lanthanides (Ln3+). Although its effectiveness has been established, the specific molecular details about the preference of HBTMPDTP for americium over europium have remained a mystery, puzzling researchers for over two decades. This study presents a comprehensive, dual-driven separation mechanism for this complex system combining experimental and theoretical approaches. A critical finding is the increased covalency in An-S bonds compared to Ln-S bonds, which plays a significant role in HBTMPDTP's intrinsic selectivity for An3+ over Ln3+. This leads to the formation of distinct An3+ and Ln3+ species, enhancing the ligand's actinide selectivity. Additionally, it provides crucial insights into the coordination chemistry of f-elements with sulfur-donating ligands, thereby deepening our understanding of this intricate field.
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Affiliation(s)
- Ning Pu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Emma Archer
- Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Xihong He
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Jing Chen
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Linfeng Rao
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jenifer C Shafer
- Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Ping Yang
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
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12
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Dong X, Hao H, Chen J, Wang Z, Xu C. Redox stabilization of Am(v) in a biphasic extraction system boosts americium/lanthanides separation efficiency. Chem Sci 2024; 15:2118-2122. [PMID: 38332823 PMCID: PMC10848673 DOI: 10.1039/d3sc06240f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Accepted: 12/25/2023] [Indexed: 02/10/2024] Open
Abstract
Americium (Am) is a key radioactive element in consideration in nuclear waste treatment. Separation of Am from the fission products, lanthanides, is a prerequisite to minimize the hazardous impact of Am and make utilization of rare Am isotopes, but it represents a great challenge due to the chemical similarity between the two groups of elements. Herein, we realize the separation by first oxidizing Am(iii) to high valent Am(vi) and then converting it to Am(v) in situ in a biphasic extraction system with Bi(v) oxidant incorporated in an organic phase. Am(v) is highly stabilized during the separation process and this leads to record high Ln/Am separation factors (>105) in a single contact over a wide range of acidities.
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Affiliation(s)
- Xue Dong
- Institute of Nuclear and New Energy Technology, Tsinghua University 100084 Beijing China
| | - Huaixin Hao
- Institute of Nuclear and New Energy Technology, Tsinghua University 100084 Beijing China
| | - Jing Chen
- Institute of Nuclear and New Energy Technology, Tsinghua University 100084 Beijing China
| | - Zhipeng Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University 100084 Beijing China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University 100084 Beijing China
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13
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Wang Q, Liu Z, Song YF, Wang D. Recent Advances in the Study of Trivalent Lanthanides and Actinides by Phosphinic and Thiophosphinic Ligands in Condensed Phases. Molecules 2023; 28:6425. [PMID: 37687254 PMCID: PMC10489984 DOI: 10.3390/molecules28176425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/01/2023] [Accepted: 09/02/2023] [Indexed: 09/10/2023] Open
Abstract
The separation of trivalent actinides and lanthanides is a key step in the sustainable development of nuclear energy, and it is currently mainly realized via liquid-liquid extraction techniques. The underlying mechanism is complicated and remains ambiguous, which hinders the further development of extraction. Herein, to better understand the mechanism of the extraction, the contributing factors for the extraction are discussed (specifically, the sulfur-donating ligand, Cyanex301) by combing molecular dynamics simulations and experiments. This work is expected to contribute to improve our systematic understanding on a molecular scale of the extraction of lanthanides and actinides, and to assist in the extensive studies on the design and optimization of novel ligands with improved performance.
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Affiliation(s)
- Qin Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Catalytic Conversion of Carbon Resources, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China;
| | - Ziyi Liu
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Catalytic Conversion of Carbon Resources, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China;
| | - Yu-Fei Song
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
| | - Dongqi Wang
- State Key Laboratory of Fine Chemicals, Liaoning Key Laboratory for Catalytic Conversion of Carbon Resources, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China;
- CAS-HKU Joint Laboratory of Metallomics on Health and Environment, Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
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14
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Rotermund BM, Sperling JM, Horne GP, Beck NB, Wineinger HB, Bai Z, Celis-Barros C, Gomez Martinez D, Albrecht-Schönzart TE. Co-Crystallization of Plutonium(III) and Plutonium(IV) Diglycolamides with Pu(III) and Pu(IV) Hexanitrato Anions: A Route to Redox Variants of [Pu III,IV(DGA) 3][Pu III,IV(NO 3) 6] x. Inorg Chem 2023; 62:12905-12912. [PMID: 37523261 DOI: 10.1021/acs.inorgchem.3c01590] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
N,N,N',N'-tetramethyl diglycolamide (TMDGA), a methylated variant of the diglycolamide extractants being proposed as curium holdback reagents in advanced used nuclear fuel reprocessing technologies, has been crystallized with plutonium, a transuranic actinide that has multiple accessible oxidation states. Two plutonium TMDGA complexes, [PuIII(TMDGA)3][PuIII(NO3)6] and[PuIV(TMDGA)3][PuIV(NO3)6]2·0.75MeOH, were crystallized through solvent diffusion of a reaction mixture containing plutonium(III) nitrate and TMDGA. The sample was then partially oxidized by air to yield [PuIV(TMDGA)3][PuIV(NO3)6]2·0.75MeOH. Single-crystal X-ray diffraction reveals that the multinuclear systems crystallize with hexanitrato anionic species, providing insight into the first solid-state isolation of the elusive trivalent plutonium hexanitrato species. Crystallography data show a change in geometry around the TMDGA metal center from Pu3+ to Pu4+, with the symmetry increasing approximately from C4v to D3h. These complexes provide a rare opportunity to investigate the bond metrics of plutonium in two different oxidation states with similar coordination environments. Further, these new structures provide insight into the potential chemical and structural differences arising from the radiation-induced formation of transient tetravalent curium oxidation states in used nuclear fuel reprocessing streams.
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Affiliation(s)
- Brian M Rotermund
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Joseph M Sperling
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
- Department of Chemistry and Nuclear Science and Engineering Center, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Gregory P Horne
- Center for Radiation Chemistry Research, Idaho National Laboratory, P.O. Box 1625, Idaho Falls, Idaho 83415, United States
| | - Nicholas B Beck
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Hannah B Wineinger
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
- Department of Chemistry and Nuclear Science and Engineering Center, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Zhuanling Bai
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Cristian Celis-Barros
- Department of Chemistry and Nuclear Science and Engineering Center, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Daniela Gomez Martinez
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Thomas E Albrecht-Schönzart
- Department of Chemistry and Nuclear Science and Engineering Center, Colorado School of Mines, Golden, Colorado 80401, United States
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15
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Gujar RB, Ansari SA, Mohapatra PK, Egberink RJM, Huskens J, Verboom W. Highly Efficient Extraction Chromatography Resin Containing Hexa- n-Octyl Nitrilotriacetamide (HONTA) for Selective Recovery of Plutonium from Acidic Feeds. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c04516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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16
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Cai Y, Ansari SA, Yuan L, Feng W, Mohapatra PK. Unassisted and Efficient Actinide/Lanthanide Separation with Pillar[5]arene-Based Picolinamide Ligands in Ionic Liquids. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.3c00382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Yimin Cai
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Seraj A. Ansari
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Lihua Yuan
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Wen Feng
- Key Laboratory of Radiation Physics and Technology of the Ministry of Education, Institute of Nuclear Science and Technology, College of Chemistry, Sichuan University, Chengdu 610064, China
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17
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Lei XP, Wu QY, Wang CZ, Lan JH, Chai ZF, Nie CM, Shi WQ. Theoretical Insights into the Substitution Effect of Phenanthroline Derivatives on Am(III)/Eu(III) Separation. Inorg Chem 2023; 62:2705-2714. [PMID: 36724403 DOI: 10.1021/acs.inorgchem.2c03823] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Separation of trivalent actinides (An(III)) and lanthanides (Ln(III)) poses a huge challenge in the reprocessing of spent nuclear fuel due to their similar chemical properties. N,N'-Diethyl-N,N'-ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen) is a potential ligand for the extraction of An(III) from Ln(III), while there are still few reports on the effect of its substituent including electron-withdrawing and electron-donating groups on An(III)/Ln(III) separation. Herein, the interaction of Et-Tol-DAPhen ligands modified by the electron-withdrawing groups (CF3, Br) and electron-donating groups (OH) with Am(III)/Eu(III) ions was investigated using scalar relativistic density functional theory (DFT). The analyses of bond order, quantum theory of atoms in molecules (QTAIM), and molecular orbital (MO) indicate that the substitution groups have a slight effect on the electronic structures of the [M(L-X)(NO3)3] (X = CF3, Br, OH) complexes. However, the thermodynamic results suggest that a ligand with the electron-donating group (L-OH) improves the extraction ability of metal ions, and the ligand modified by the electron-withdrawing group (L-Br) has the best Am(III)/Eu(III) selectivity. This work could render new insights into understanding the effect of electron-withdrawing and electron-donating groups in tuning the selectivity of Et-Tol-DAPhen derivatives and pave the way for designing new ligands modified by substituted groups with better extraction ability and An(III)/Ln(III) selectivity.
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Affiliation(s)
- Xia-Ping Lei
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China.,Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Qun-Yan Wu
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Cong-Zhi Wang
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Jian-Hui Lan
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Zhi-Fang Chai
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Chang-Ming Nie
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Wei-Qun Shi
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
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18
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Ion sieving in graphene oxide membrane enables efficient actinides/lanthanides separation. Nat Commun 2023; 14:261. [PMID: 36650148 PMCID: PMC9845371 DOI: 10.1038/s41467-023-35942-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 01/09/2023] [Indexed: 01/19/2023] Open
Abstract
Separation of actinides from lanthanides is of great importance for the safe management of nuclear waste and sustainable development of nuclear energy, but it represents a huge challenge due to the chemical complexity of these f-elements. Herein, we report an efficient separation strategy based on ion sieving in graphene oxide membrane. In the presence of a strong oxidizing reagent, the actinides (U, Np, Pu, Am) in a nitric acid solution exist in the high valent and linear dioxo form of actinyl ions while the lanthanides (Ce, Nd, Eu, Gd, etc.) remain as trivalent/tetravalent spheric ions. A task-specific graphene oxide membrane with an interlayer nanochannel spacing between the sizes of hydrated actinyl ions and lanthanides ions is tailored and used as an ionic cut-off filter, which blocks the larger and linear actinyl ions but allows the smaller and spheric lanthanides ions to penetrate through, affording lanthanides/actinides separation factors up to ~400. This work realizes the group separation of actinides from lanthanides under highly acidic conditions by a simple ion sieving strategy and highlights the great potential of utilizing graphene oxide membrane for nuclear waste treatment.
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19
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Chattaraj S, Bhattacharyya A. Bonding of isovalent homologous actinide and lanthanide pairs with chalcogenide donors: effect of metal f-orbital participation and donor softness. Struct Chem 2022. [DOI: 10.1007/s11224-022-02094-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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20
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Fan J, Duan L, Wang Y, Zhang X, Chen G, Liang J, Tian X, Li Z. Automated separation of Am from Sm by two-stage polymer-based HDEHP extraction chromatography. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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21
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Artyushin OI, Tcarkova KV, Bondarenko NA. Diphenyl(N-alkyl-N-diphenylphosphinylmethyl)carbamoylmethylphosphine Oxides: Synthesis and NMR Spectroscopy Study. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s1070363222120076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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22
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Turanov AN, Karandashev VK, Brel VK. Synthesis and Extraction Properties of 2-(3,4-Diphenylphosphinylpyrrolidin-1-yl)ethanol and 3-(3,4-Diphenylphosphinylpyrrolidin-1-yl)propanol. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s1070363222120131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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23
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Extraction chromatography studies using camphor-bistriazinyl pyridine impregnated resins for americium separation from europium. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08663-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Turanov AN, Karandashev VK, Baulin VE, Baulin DV, Kostikova GV, Fedoseev AM. Effect of the Structure of Phosphoryl-Containing Podands on the Extraction of Actinides and Lanthanides(III) from Nitric Acid Solutions. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s1070363222110135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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25
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Yan Q, Cai Y, Wang Z, Dong X, Yuan L, Feng W, Chen J, Xu C. Separation of americium from lanthanide by a Task-Specific ionic liquid decorated with 2,6-Bis-Triazolyl-Pyridine moiety. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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26
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Luan XF, Wang CZ, Wu QY, Lan JH, Chai ZF, Xia LS, Shi WQ. Theoretical insights into selective extraction of uranium from seawater with tetradentate N,O-mixed donor ligands. Dalton Trans 2022; 51:11381-11389. [PMID: 35818929 DOI: 10.1039/d2dt01273a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The competition of uranium and vanadium ions is a major challenge in extracting uranium from seawater. In-depth exploration of the complexation of uranium and vanadium ions with promising ligands is essential to design highly efficient ligands for selective recovery of uranium. In this work, we systematically explored the uranyl and vanadium extraction complexes with three tetradentate N,O-mixed donor analogues including the rigid backbone ligands 1,10-phenanthroline-2,9-dicarboxylic acid (PDA, L1) and 5H-cyclopenta[2,1-b:3,4-b']dipyridine-2,8-dicarboxylate acid (L3), as well as the flexible ligand [2,2'-bipyridine]-6,6'-dicarboxylate acid (L2) using density functional theory (DFT). These ligands coordinate to the uranyl cation in a tetradentate fashion, while L1 and L3 act as tridentate ligands toward VO2+ due to the smaller ionic radius of VO2+ and larger cleft sizes of L1 and L3. Bonding analyses show that the metal-ligand bonding orbitals of the uranyl complexes [UO2L(CO3)]2-, [UO2L(OH)]-, and [UO2L(H2O)] mainly arise from the interactions of the U 5f, 6d orbitals and N, O 2p orbitals. Because of the rigid structure and more suitable chelate ring size, the L1 ligand possesses a stronger complexing ability for uranyl ions than other ligands, while the L3 ligand has weaker binding affinity than L1 and L2. All these ligands prefer to coordinate with the uranyl cation rather than vanadium ion, indicating the selectivity of these ligands to [UO2(CO3)3]4- over H2VO4- and HVO42- in seawater. This is mainly attributed to the metal ion size-based selectivity and structural preorganization of the ligands. These results demonstrate that the backbone of these ligands affect their extraction behaviors. It is expected that this work might prove useful in designing efficient ligands for uranium extraction from seawater.
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Affiliation(s)
- Xue-Fei Luan
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China. .,School of Nuclear Science and Technology, University of South China, Hengyang 421001, Hunan Province, China.
| | - Cong-Zhi Wang
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
| | - Qun-Yan Wu
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
| | - Jian-Hui Lan
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
| | - Zhi-Fang Chai
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
| | - Liang-Shu Xia
- School of Nuclear Science and Technology, University of South China, Hengyang 421001, Hunan Province, China.
| | - Wei-Qun Shi
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
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Turanov AN, Karandashev VK, Yarkevich AN. Influence of the Structure of Biscarbamoylmethylphosphine Oxides on the Extraction of REE(III), U(VI), and Th(IV) from Nitric Acid Solutions in the Presence of an Ionic Liquid. RADIOCHEMISTRY 2022. [DOI: 10.1134/s1066362222020072] [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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28
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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 Modified Carbamoylmethylphosphine Oxides from Nitric Acid Solutions. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s1070363222060160] [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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29
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Weßling P, Trumm M, Sittel T, Geist A, Panak PJ. Spectroscopic investigation of the different complexation and extraction properties of diastereomeric diglycolamide ligands. RADIOCHIM ACTA 2022. [DOI: 10.1515/ract-2021-1134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
(2R,2′S)-2,2′-oxybis-(N,N-didecylpropanamide) (cis-mTDDGA) and (2R,2′R)-2,2′-oxybis-(N,N-didecylpropanamide) (trans-mTDDGA) were studied using time-resolved laser fluorescence spectroscopy (TRLFS), vibronic side-band spectroscopy (VSBS) and density functional theory calculations (DFT) to find reasons for their different extraction properties. Stability constants of the respective Cm(III) and Eu(III) complexes show cis-mTDDGA to be the superior ligand which is in agreement with results from extraction experiments. cis-mTDDGA extracts Cm(III) and Eu(III) as 1:3 complexes. In case of trans-mTDDGA, 1:2 complexes of the form [M(trans-mTDDGA)2(η1-NO3)(H2O)2]2+ (M = Cm, Eu) are extracted additionally to the 1:3 complexes. VSBS and DFT confirm the presence of inner-sphere nitrate in the 1:2 complex.
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Affiliation(s)
- Patrik Weßling
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, 76021 Karlsruhe , Germany
- Heidelberg University, Institute for Physical Chemistry , Im Neuenheimer Feld 253, 69120 Heidelberg , Germany
| | - Michael Trumm
- Heidelberg University, Institute for Physical Chemistry , Im Neuenheimer Feld 253, 69120 Heidelberg , Germany
| | - Thomas Sittel
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, 76021 Karlsruhe , Germany
- Heidelberg University, Institute for Physical Chemistry , Im Neuenheimer Feld 253, 69120 Heidelberg , Germany
| | - Andreas Geist
- Heidelberg University, Institute for Physical Chemistry , Im Neuenheimer Feld 253, 69120 Heidelberg , Germany
| | - Petra J. Panak
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE) , P.O. Box 3640, 76021 Karlsruhe , Germany
- Heidelberg University, Institute for Physical Chemistry , Im Neuenheimer Feld 253, 69120 Heidelberg , Germany
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30
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Huang PW. Theoretical unraveling of the separation of trivalent Am and Eu ions by phosphine oxide ligands with different central heterocyclic moieties. Dalton Trans 2022; 51:7118-7126. [PMID: 35466979 DOI: 10.1039/d2dt00509c] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The treatment of nuclear spent fuels, especially the separation of minor actinides, is an imperative task for the healthy development of the nuclear industry. Up to now, it still remains a worldwide challenge to separate trivalent An3+ from Ln3+ because of their similar chemical properties. Therefore, investigating the mechanism behind the selective extraction of An3+ by theoretical methods is necessary. In this work, three phosphine oxide ligands with the same side structures but different bridging frameworks, Ph2PyPO, Ph2BipyPO and Ph2PhenPO, were investigated theoretically, and compared with each other using relativistic density functional theory. The results of QTAIM and MBO suggest that the Am-N bonds in the studied complexes have more covalent character than those in the Eu-N bonds, whereas the PDOS analysis indicates that more overlap exists between Am-5f and the Ph2PyPO's N-2p orbital than between Am-5f and Ph2BipyPO's N-2p, and Am-5f and Ph2PhenPO's N-2p orbital. However, the studied ligands all possess stronger affinities towards Am3+ than Eu3+, which partly results in the Am3+ selectivity towards Eu3+ in these three ligands. The calculated reaction free energy can reproduce the Am/Eu separation ability difference of three ligands well. This work offers some useful information for An/Ln separation of phosphine oxide ligands, and may help to design more efficient An3+/Ln3+ separation ligands.
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Affiliation(s)
- Pin-Wen Huang
- Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, People's Republic of China.
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31
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Costa Peluzo BMT, Kraka E. Uranium: The Nuclear Fuel Cycle and Beyond. Int J Mol Sci 2022; 23:ijms23094655. [PMID: 35563047 PMCID: PMC9101921 DOI: 10.3390/ijms23094655] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 04/13/2022] [Accepted: 04/18/2022] [Indexed: 01/01/2023] Open
Abstract
This review summarizes the recent developments regarding the use of uranium as nuclear fuel, including recycling and health aspects, elucidated from a chemical point of view, i.e., emphasizing the rich uranium coordination chemistry, which has also raised interest in using uranium compounds in synthesis and catalysis. A number of novel uranium coordination features are addressed, such the emerging number of U(II) complexes and uranium nitride complexes as a promising class of materials for more efficient and safer nuclear fuels. The current discussion about uranium triple bonds is addressed by quantum chemical investigations using local vibrational mode force constants as quantitative bond strength descriptors based on vibrational spectroscopy. The local mode analysis of selected uranium nitrides, N≡U≡N, U≡N, N≡U=NH and N≡U=O, could confirm and quantify, for the first time, that these molecules exhibit a UN triple bond as hypothesized in the literature. We hope that this review will inspire the community interested in uranium chemistry and will serve as an incubator for fruitful collaborations between theory and experimentation in exploring the wealth of uranium chemistry.
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32
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Cao H, Wei P, Pu N, Zhang Y, Yang Y, Wang Z, Sun T, Chen J, Xu C. Probing the Difference in the Complexation of Trivalent Actinides and Lanthanides with a Tridentate N,O-Hybrid Ligand: Spectroscopy, Thermodynamics, and Coordination Modes. Inorg Chem 2022; 61:6063-6072. [PMID: 35420792 DOI: 10.1021/acs.inorgchem.2c00114] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Comparatively revealing the complexation behavior of trivalent actinides and lanthanides with functional ligands in aqueous solution is of great importance to enrich our knowledge on the fundamental coordination chemistry of trivalent f-block elements and to control the fate of minor actinides in nuclear fuel cycles. In this work, the complexation of Am(III) and Nd(III), representatives for trivalent actinides and lanthanides, respectively, with a N,O-hybrid ligand 6-(dimethylcarbamoyl)picolinic acid (DMAPA, denoted as HL) was investigated by absorption spectroscopy, calorimetry, X-ray crystallography, and density functional theory (DFT) calculations. Successive formation of 1:1, 1:2, and 1:3 (metal/ligand) complexes of Am(III) and Nd(III) with DMAPA was identified, and the corresponding thermodynamic parameters were determined. The binding strength of Am(III) with DMAPA is slightly stronger than that of Nd(III), and the complexation of Nd(III) with DMAPA is mainly entropy-driven. The crystal structure of the 1:2 Nd(III)/DMAPA complex and the DFT calculation shed additional light on the coordination and structural characteristics of the complexes. In contrast to the Nd-N bond in the Nd(III)/DMAPA complex, the Am-N bond in the Am(III)/DMAPA complex exhibits more covalency, which contributes to the slightly stronger complexation of Am(III) with DMAPA.
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Affiliation(s)
- Hong Cao
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Pingping Wei
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Ning Pu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Yusheng Zhang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Yanqiu Yang
- Institute of Nuclear Physics and Chemistry, CAEP, Mianyang, Sichuan 621900, China
| | - Zhipeng Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Taoxiang Sun
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Jing Chen
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
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33
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Abigail Jennifer G, Ebenezer C, Vijay Solomon R. Selective Complexation of trivalent Americium over Europium with substituted Triazolebipyridine-based Ligand in High Level-Liquid Waste- A DFT investigation. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115832] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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34
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Wang Z, Lu JB, Dong X, Yan Q, Feng X, Hu HS, Wang S, Chen J, Li J, Xu C. Ultra-Efficient Americium/Lanthanide Separation through Oxidation State Control. J Am Chem Soc 2022; 144:6383-6389. [PMID: 35353513 DOI: 10.1021/jacs.2c00594] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Lanthanide/actinide separation is a worldwide challenge for atomic energy and nuclear waste treatment. Separation of americium (Am), a critical actinide element in the nuclear fuel cycle, from lanthanides (Ln) is highly desirable for minimizing the long-term radiotoxicity of nuclear waste, yet it is extremely challenging given the chemical similarity between trivalent Am(III) and Ln(III). Selective oxidation of Am(III) to a higher oxidation state (OS) could facilitate this separation, but so far, it is far from satisfactory for practical application as a result of the unstable nature of Am in a high OS. Herein, we find a novel strategy to generate stable pentavalent Am (Am(V)) through coordination of Am(III) with a diglycolamide ligand and oxidation with Bi(V) species in the presence of an organic solvent. This strategy leads to efficient stabilization of Am(V) and an extraordinarily high separation factor (>104) of Am from Ln through one single contact in solvent extraction, thereby opening a new avenue to study the high-OS chemistry of Am and fulfill the crucial task of Ln/Am separation in the nuclear fuel cycle. The synergistic coordination and oxidation process is found to occur in the organic solvent, and the mechanism has been well elucidated by quantum-theoretical modeling.
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Affiliation(s)
- Zhipeng Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Jun-Bo Lu
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xue Dong
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Qiang Yan
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Xiaogui Feng
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Han-Shi Hu
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing 100084, China
| | - Shuao Wang
- State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences, Soochow University, Suzhou 215123, China
| | - Jing Chen
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Jun Li
- Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China.,Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing 100084, China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
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35
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Ferrie L, Arrambide C, Darcos V, Prelot B, Monge S. Synthesis and evaluation of functional carboxylic acid based poly(εCL-st-αCOOHεCL)-b-PEG-b-poly(εCL-st-αCOOHεCL) copolymers for neodymium and cerium complexation. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2021.105157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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36
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Kuznetsova AA, Chachkov DV, Tcarkova KV, Bondarenko NA, Vereshchagina YA. Conformational Analysis of Dibutylphosphorylacetic Acid N,N-Dibutylamide in Solution. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s107036322112029x] [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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37
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Trunks TM, Babra JS, Westwood J, Smith CD. A Homocoupling Approach to the Key Dione of CyMe4-BTPhen – Vital Ligands for Nuclear Clean-Up by the SANEX Process. SYNOPEN 2022. [DOI: 10.1055/a-1737-8610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
CyMe4-BTPhen and CyMe4-BTBP are the principal ligand systems used in Europe for the separation of actinides from lanthanides as a part of the SANEX process for nuclear recycling and reprocessing. We present a new approach to the synthesis of the CyMe4-fragment beginning from readily available hydroxypivalic acid. It features a cobalt-catalysed homocoupling of a neopentyl bromide to provide the key bis-ester precursor, thereby avoiding the requirement for technically challenging low temperature LDA-mediated aldol chemistries.
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Affiliation(s)
- Thomas M Trunks
- Department of Chemistry, University of Reading, Reading, United Kingdom of Great Britain and Northern Ireland
| | - Jasraj Singh Babra
- Department of Chemistry, University of Reading, Reading, United Kingdom of Great Britain and Northern Ireland
| | - James Westwood
- Department of Chemistry, University of Reading, Reading, United Kingdom of Great Britain and Northern Ireland
| | - Christopher David Smith
- Department of Chemistry, University of Reading, Reading, United Kingdom of Great Britain and Northern Ireland
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38
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Sasaki Y, Kaneko M, Matsumiya M, Nakase M, Takeshita K. Mutual Separation of Ln and an Using TODGA and DTBA with High Organic Acid Concentrations. SOLVENT EXTRACTION AND ION EXCHANGE 2022. [DOI: 10.1080/07366299.2021.2024650] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | | | - Masahiko Matsumiya
- Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Japan
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39
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Lemport PS, Evsiunina MV, Matveev PI, Petrov VS, Pozdeev AS, Khult EK, Nelyubina YV, Isakovskaya KL, Roznyatovsky VA, Gloriozov IP, Tarasevich BN, Aldoshin AS, Petrov VG, Kalmykov SN, Ustynyuk YA, Nenajdenko VG. 2-Methylpyrrolidine derived 1,10-phenanthroline-2,9-diamides: promising extractants for Am( iii)/Ln( iii) separation. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00803c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work we report on new examples of phenanthrolindiamides containing asymmetric centers in amide substituents.
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Affiliation(s)
- P. S. Lemport
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - M. V. Evsiunina
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - P. I. Matveev
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - V. S. Petrov
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - A. S. Pozdeev
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - E. K. Khult
- Department of Materials Science, Lomonosov Moscow State University, Leninskie gory 1 bld. 73, Moscow 119991, Russia
| | - Yu. V. Nelyubina
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Russia
| | - K. L. Isakovskaya
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Russia
- D.I. Mendeleev University of Chemical Technology of Russia, Russia
| | - V. A. Roznyatovsky
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - I. P. Gloriozov
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - B. N. Tarasevich
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - A. S. Aldoshin
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - V. G. Petrov
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - S. N. Kalmykov
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - Yu. A. Ustynyuk
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - V. G. Nenajdenko
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
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40
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Mahanty B, Mohapatra PK, Leoncini A, Huskens J, Verboom W. Unique Eu(III) transport selectivity seen using a supported liquid membrane containing a diglycolamide dendrimer ligand. SEP SCI TECHNOL 2021. [DOI: 10.1080/01496395.2021.2006231] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Bholanath Mahanty
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
| | | | - Andrea Leoncini
- Laboratory of Molecular Nanofabrication, MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands
| | - Jurriaan Huskens
- Laboratory of Molecular Nanofabrication, MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands
| | - Willem Verboom
- Laboratory of Molecular Nanofabrication, MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands
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41
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Highly efficient and selective extraction of Pu(IV) using two alkyl-substituted amides of nitrilo triacetic acid from nitric acid solutions. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119584] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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42
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Turanov АN, Karandashev VК, Yarkevich AN. Novel Bis(diphenylcarbamoylmethylphosphine oxide) Ligand for Effective Extraction of Actinides and Lanthanides from Nitric Acid Solutions. SOLVENT EXTRACTION AND ION EXCHANGE 2021. [DOI: 10.1080/07366299.2021.2001973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- А. N. Turanov
- Osipyan Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Russia
| | - V. К. Karandashev
- Institute of Microelectronics Technology and High Purity Materials, Russian Academy of Sciences, Chernogolovka, Russia
| | - A. N. Yarkevich
- Institute of Physiologically Active Compounds, Russian Academy of Sciences, Chernogolovka, Russia
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43
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Horne GP, Grimes TS, Zalupski PR, Meeker DS, Albrecht-Schönzart TE, Cook AR, Mezyk SP. Curium(iii) radiation-induced reaction kinetics in aqueous media. Dalton Trans 2021; 50:10853-10859. [PMID: 34296716 DOI: 10.1039/d1dt01268a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Insight into the effects of radiolytic processes on the actinides is critical for advancing our understanding of their solution chemistry because the behaviour of these elements cannot be easily separated from the influence of their inherent radiation field. However, minimal information exists on the radiation-induced redox behaviour of curium (Cm), a key trivalent transuranic element present in used nuclear fuel and frequently used as an alpha radiation source. Here we present a kinetic study on the aqueous redox reactions of Cm(iii) with radicals generated through the radiolysis of aqueous media. In particular, we probe reaction kinetics in nitric acid solutions that are used as the aqueous phase component of used nuclear fuel reprocessing solvent systems. Second-order rate coefficients (k) were measured for the reaction of Cm(iii) with the hydrated electron (eaq-, k = (1.25 ± 0.03) × 1010 M-1 s-1), hydrogen atom (H˙, k = (5.16 ± 0.37) × 108 M-1 s-1), hydroxyl radical (˙OH, k = (1.69 ± 0.24) × 109 M-1 s-1), and nitrate radical (NO3˙, k = (4.83 ± 0.09) × 107 M-1 s-1). Furthermore, the first-ever Cm(ii) absorption spectrum (300-700 nm) is also reported. These kinetic data dispel the status quo notion of Cm(iii) possessing little to no redox chemistry in aqueous solution, and suggest that the resulting Cm(ii) and Cm(iv) transients could exist in irradiated aqueous solutions and be available to undergo subsequent redox chemistry with other solutes.
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Affiliation(s)
- Gregory P Horne
- Idaho National Laboratory, Center for Radiation Chemistry Research, Idaho Falls, ID, P.O. Box 1625, 83415, USA.
| | - Travis S Grimes
- Idaho National Laboratory, Center for Radiation Chemistry Research, Idaho Falls, ID, P.O. Box 1625, 83415, USA.
| | - Peter R Zalupski
- Idaho National Laboratory, Center for Radiation Chemistry Research, Idaho Falls, ID, P.O. Box 1625, 83415, USA.
| | - David S Meeker
- Idaho National Laboratory, Center for Radiation Chemistry Research, Idaho Falls, ID, P.O. Box 1625, 83415, USA. and Florida State University, Department of Chemistry and Biochemistry, Tallahassee, FL 32306, USA
| | | | - Andrew R Cook
- Department of Chemistry, Brookhaven National Laboratory, Upton, New York, 11973, USA
| | - Stephen P Mezyk
- Department of Chemistry and Biochemistry, California State University Long Beach, 1250 Bellflower Boulevard, Long Beach California 90840-9507, USA.
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44
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Karak A, Mahanty B, Mohapatra PK, Egberink RJM, Valsala TP, Sathe DB, Bhatt RB, Huskens J, Verboom W. Liquid–Liquid Extraction of Actinides from Nitric Acid Feeds Using Two Hexa-n-alkylnitrilotriacetamides. SOLVENT EXTRACTION AND ION EXCHANGE 2021. [DOI: 10.1080/07366299.2021.1946999] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Ananda Karak
- INRPO, FF, Nuclear Recycle Board, Bhabha Atomic Research Centre, Tarapur, India
- Homi Bhabha National Institute, Mumbai, India
| | - Bholanath Mahanty
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
| | - Prasanta K. Mohapatra
- Homi Bhabha National Institute, Mumbai, India
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, India
| | - Richard J. M. Egberink
- Laboratory of Molecular Nanofabrication, MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands
| | - T. P. Valsala
- INRPO, FF, Nuclear Recycle Board, Bhabha Atomic Research Centre, Tarapur, India
| | - D. B. Sathe
- INRPO, FF, Nuclear Recycle Board, Bhabha Atomic Research Centre, Tarapur, India
| | - R. B. Bhatt
- INRPO, FF, Nuclear Recycle Board, Bhabha Atomic Research Centre, Tarapur, India
| | - Jurriaan Huskens
- Laboratory of Molecular Nanofabrication, MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands
| | - Willem Verboom
- Laboratory of Molecular Nanofabrication, MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands
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45
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Niu K, Yang F, Gaudin T, Ma H, Fang W. Theoretical Study of Effects of Solvents, Ligands, and Anions on Separation of Trivalent Lanthanides and Actinides. Inorg Chem 2021; 60:9552-9562. [PMID: 34161729 DOI: 10.1021/acs.inorgchem.1c00657] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Due to its associated low CO2 emissions, nuclear energy production is rapidly growing. In this context, the treatment of high-level liquid waste (HLLW) of nuclear plants is of high concern to both scientific and industrial communities. Specifically, the separation of An(III) and Ln(III) cations when processing nuclear fuel is a vitally important, yet challenging, step within HLLW because An(III) and Ln(III) have similar chemical properties in solution. To guide the choice of relevant ligands, anions, and solvents for this separation step, in this work, we calculate and compare the free energy of formation of different Am(III) and Eu(III) complexes (which are typical and important An(III) and Ln(III) cation examples), involving two different ligands and three different counter ions in four different solvents. Based on our calculations, we predict that the chosen solvent is a key factor in the extraction of Am(III) and Eu(III) in treatment of HLLW. This study supports a systematic, computation-assisted screening of solvents and extractive ligands with counter anions as a proficient method to optimize the separation of Ln(III) and An(III).
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Affiliation(s)
- Ke Niu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Feng Yang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Théophile Gaudin
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Haibo Ma
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.,Jiangsu Key Laboratory of Vehicle Emissions Control, Nanjing University, Nanjing 210023, China
| | - Weihai Fang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.,Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education, Department of Chemistry, Beijing Normal University, Beijing 100875, China
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46
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Bhattacharyya A, Ansari SA, Karthikeyan NS, Ravichandran C, Venkatachalapathy B, Rao TS, Seshadri H, Mohapatra PK. Bis-(1,2,4-triazin-3-yl) ligand structure driven selectivity reversal between Am 3+ and Cm 3+: solvent extraction and DFT studies. Dalton Trans 2021; 50:7783-7790. [PMID: 33999062 DOI: 10.1039/d1dt00307k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Selectivity between Am3+ and Cm3+ was investigated after their aqueous complexation with three structurally tailored hydrophilic bis-(1,2,4-triazin-3-yl) ligands followed by their extraction with N,N,N'N'-tetraoctyl diglycolamide (TODGA) dissolved in an ionic liquid (C4mim·Tf2N). The three hydrophilic ligands used were SO3PhBTP, SO3PhBTBP, and SO3PhBTPhen. It was evident from the solvent extraction studies that SO3PhBTP formed a stronger complex with Cm3+ than with Am3+, but SO3PhBTPhen showed better complexation ability for Am3+ than for Cm3+, and SO3PhBTBP showed no selectivity for the two actinide ions. DFT calculations indicated that the coordinating 'N' atoms in BTP were more co-planar in the complex and this co-planarity was higher in the Cm3+ complex as compared to that in Am3+. In the case of BTBP and BTPhen ligands, on the other hand, the co-planarity was more pronounced in the Am3+ complexes. Mayer's bond order calculations of M-N bonds in the complexes also indicated a reversal of the complexation ability of the BTP and BTPhen ligands for Am3+ and Cm3+. Calculations of the complexation energies further supported the higher selectivity of the BTP ligand for Am3+ by -52.0 kJ mol-1, and better selectivity of the BTPhen ligand for Cm3+ by -24.7 kJ mol-1.
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Affiliation(s)
| | - S A Ansari
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai - 400 085, India.
| | - N S Karthikeyan
- Easwari Engineering College, Ramapuram, Chennai - 600089, India
| | - C Ravichandran
- Easwari Engineering College, Ramapuram, Chennai - 600089, India
| | | | - T S Rao
- Water & Steam Chemistry Division, BARC, Kalpakkam - 603102, India
| | - H Seshadri
- Safety Research Institute, Atomic Energy Regulatory Board, Kalpakkam - 603102, India
| | - P K Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai - 400 085, India.
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47
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Bhattacharyya A, Mohapatra PK. Ligand Structure and Topology Effects in Complexation Selectivity of Am
3+
and Eu
3+
with ′O′, ′N′ and ′S′ Heterocyclic Diamides: A DFT Study. ChemistrySelect 2021. [DOI: 10.1002/slct.202101289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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48
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Synthesis, coordination and extraction properties of 2,3-bis(diphenylphosphoryl)pyridine toward f-block elements. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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49
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Synthesis, coordination and extraction properties of 2,3-bis(diphenylphosphoryl)pyridine toward f-block elements. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.04.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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50
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Goodwin CAP, Schlimgen AW, Albrecht‐Schönzart TE, Batista ER, Gaunt AJ, Janicke MT, Kozimor SA, Scott BL, Stevens LM, White FD, Yang P. Structural and Spectroscopic Comparison of Soft‐Se vs. Hard‐O Donor Bonding in Trivalent Americium/Neodymium Molecules. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202017186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | | | | | - Enrique R. Batista
- Theoretical Division Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Andrew J. Gaunt
- Chemistry Division Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Michael T. Janicke
- Chemistry Division Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Stosh A. Kozimor
- Chemistry Division Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Brian L. Scott
- Materials Physics and Applications Division Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Lauren M. Stevens
- Chemistry Division Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Frankie D. White
- Chemistry Division Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Ping Yang
- Theoretical Division Los Alamos National Laboratory Los Alamos NM 87545 USA
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