1
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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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2
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O’Connell-Danes J, Ngwenya BT, Morrison CA, Nichol GS, Delmau LH, Love JB. Shape-Selective Supramolecular Capsules for Actinide Precipitation and Separation. JACS AU 2024; 4:798-806. [PMID: 38425904 PMCID: PMC10900489 DOI: 10.1021/jacsau.3c00793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/23/2024] [Accepted: 01/23/2024] [Indexed: 03/02/2024]
Abstract
Improving actinide separations is key to reducing barriers to medical and industrial actinide isotope production and to addressing the challenges associated with the reprocessing of spent nuclear fuel. Here, we report the first example of a supramolecular anion recognition process that can achieve this goal. We have designed a preorganized triamidoarene receptor that induces quantitative precipitation of the early actinides Th(IV), Np(IV), and Pu(IV) from industrially relevant conditions through the formation of self-assembled hydrogen-bonded capsules. Selectivity over the later An(III) elements is shown through modulation of the nitric acid concentration, and no precipitation of actinyl or transition-metal ions occurs. The Np, Pu, and Am precipitates were characterized structurally by single-crystal X-ray diffraction and reveal shape specificity of the internal hydrogen-bonding array for the encapsulated hexanitratometalates. This work complements ion-exchange resins for 5f-element separations and illustrates the significant potential of supramolecular separation methods that target anionic actinide species.
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Affiliation(s)
| | - Bryne T. Ngwenya
- School
of Geosciences, University of Edinburgh, Edinburgh EH9 3FE, U.K.
| | - Carole A. Morrison
- EaStCHEM
School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, U.K.
| | - Gary S. Nichol
- EaStCHEM
School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, U.K.
| | - Lætitia H. Delmau
- Radioisotope
Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jason B. Love
- EaStCHEM
School of Chemistry, University of Edinburgh, Edinburgh EH9 3FJ, U.K.
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3
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Wu S, Li AY. Theoretical investigations into the bonding and separation properties of non-rigid, partially rigid, and rigid ligands derived from Et-Tol-PTA with trivalent lanthanides and actinides. Phys Chem Chem Phys 2024; 26:2205-2217. [PMID: 38164958 DOI: 10.1039/d3cp04717b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
The separation of trivalent actinide elements from lanthanide elements represents one of the most formidable challenges within the context of nuclear waste partitioning and transmutation (P&T) processes. Consequently, we embarked on a systematic investigation aimed at elucidating the bonding properties and thermodynamic behavior of a N-ethyl-N-tolyl-2-amide-1,10-phenanthroline (Et-Tol-PTA) ligand in conjunction with trivalent actinide and lanthanide elements. This investigation involved the utilization of various density functional theory (DFT) methods and a comparative analysis between small-core pseudopotential basis sets and all-electron basis sets. It was found that well-performing results were achieved using the PBE0 functional in both bond length and thermodynamic energy calculations, with minimal impact being exerted by the basis set on the results. Furthermore, an exploration was carried out into the bonding and thermodynamic properties of trivalent actinides and lanthanides with ligands derived from Et-Tol-PTA, encompassing non-rigid (La), partially rigid (Lb, Lc), and rigid (Ld) ligands. Thermodynamically, advantages in the separation of Am(III)/Eu(III) were exhibited by Lb and Lc ligands, while excellent performance in the separation of Am(III)/Cm(III) was demonstrated by the La ligand. Analyses conducted using quantum theory of atoms in molecules (QTAIM), reduced density gradient (RDG), and natural bond orbital (NBO) methodologies revealed the presence of partial covalent character in the bonds between oxygen (O) and metal (M), as well as between nitrogen (N) and metal (M), with a higher degree of covalent character being observed in O-Am and N-Am bonds compared to O-Cm/Eu and N-Cm/Eu interactions.
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Affiliation(s)
- Shouqiang Wu
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China.
| | - An Yong Li
- School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China.
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4
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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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5
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Selective adsorption of 99Tc and recovery of lanthanides at different acidity by PS-TMMA resin with double functional groups. J Radioanal Nucl Chem 2023. [DOI: 10.1007/s10967-022-08754-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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6
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3–(2–Pyridyl)pyrazole Based Luminescent 1D-Coordination Polymers and Polymorphic Complexes of Various Lanthanide Chlorides Including Orange-Emitting Cerium(III). INORGANICS 2022. [DOI: 10.3390/inorganics10120254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
A series of 18 lanthanide-containing 1D-coordination polymers 1∞[Ln2(2–PyPzH)4Cl6], Ln = La, Nd, Sm, dinuclear polymorphic complexes α–, β–[Ln2(2–PyPzH)4Cl6], Ln = Sm, Eu, Gd, α–[Tb2(2–PyPzH)4Cl6], and [Gd2(2–PyPzH)3(2–PyPz)Cl5], mononuclear complexes [Ce(2–PyPzH)3Cl3], [Ln(2–PyPzH)2Cl3], Ln = Tb, Dy, Ho, and Er, and salt-like complexes [Gd3(2–PyPzH)8Cl8]Cl and [PyH][Tb(2–PyPzH)2Cl4] were obtained from the reaction of the respective lanthanide chloride with the 3–(2–pyridyl)pyrazole (2–PyPzH) ligand at different temperatures. An antenna effect through ligand-to-metal energy transfer was observed for several products, leading to the highest luminescence efficiency displayed by a quantum yield of 92% in [Tb(2–PyPzH)2Cl3]. The Ce3+ ion in the complex [Ce(2–PyPzH)3Cl3] exhibits a bright and orange 5d-based broadband emission with a maximum at around 600 nm, marking an example of a strong reduction of the 5d-excited states of Ce(III). The absorption spectroscopy shows ion-specific 4f–4f transitions, which can be assigned to Nd3+, Sm3+, Eu3+, Dy3+, Ho3+, and Er3+ in a wide spectral range from UV–VIS to the NIR region.
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7
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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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8
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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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9
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Burk J, Sikk L, Tämm K, Burk P. Comparative DFT study of americium and europium complexation with 2,9-bis(1,2-diazin-3-yl)-1,10-phenanthroline ligand in gas phase. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Zhang X, Adelman SL, Arko BT, De Silva CR, Su J, Kozimor SA, Mocko V, Shafer JC, Stein BW, Schreckenbach G, Batista ER, Yang P. Advancing the Am Extractant Design through the Interplay among Planarity, Preorganization, and Substitution Effects. Inorg Chem 2022; 61:11556-11570. [PMID: 35866884 DOI: 10.1021/acs.inorgchem.2c00534] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Advancing the field of chemical separations is important for nearly every area of science and technology. Some of the most challenging separations are associated with the americium ion Am(III) for its extraction in the nuclear fuel cycle, 241Am production for industrial usage, and environmental cleanup efforts. Herein, we study a series of extractants, using first-principle calculations, to identify the electronic properties that preferentially influence Am(III) binding in separations. As the most used extractant family and because it affords a high degree of functionalization, the polypyridyl family of extractants is chosen to study the effects of the planarity of the structure, preorganization of coordinating atoms, and substitution of various functional groups. The actinyl ions are used as a structurally simplified surrogate model to quickly screen the most promising candidates that can separate these metal ions. The down-selected extractants are then tested for the Am(III)/Eu(III) system. Our results show that π interactions, especially those between the central terpyridine ring and Am(III), play a crucial role in separation. Adding an electron-donating group onto the terpyridine backbone increases the binding energies to Am(III) and stabilizes Am-terpyridine coordination. Increasing the planarity of the extractant increases the binding strength as well, although this effect is found to be rather weak. Preorganizing the coordinating atoms of an extractant to their binding configuration as in the bound metal complex speeds up the binding process and significantly improves the kinetics of the separation process. This conclusion is validated by the synthesized 1,2-dihydrodipyrido[4,3-b;5,6-b]acridine (13) extractant, a preorganized derivative of the terpyridine extractant, which we experimentally showed was four times more effective than terpyridine at separating Am3+ from Eu3+ (SFAm/Eu ∼ 23 ± 1).
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Affiliation(s)
- Xiaobin Zhang
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States.,Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
| | - Sara L Adelman
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Brian T Arko
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States.,Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Channa R De Silva
- Department of Chemistry & Physics, Western Carolina University, Cullowhee, North Carolina 28723, United States
| | - Jing Su
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Stosh A Kozimor
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Veronika Mocko
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Jenifer C Shafer
- Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Benjamin W Stein
- Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Georg Schreckenbach
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
| | - Enrique R Batista
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Ping Yang
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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11
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Ossola A, Mossini E, Macerata E, Panzeri W, Mele A, Mariani M. Promising Lipophilic PyTri Extractant for Selective Trivalent Actinide Separation from High Active Raffinate. Ind Eng Chem Res 2022; 61:4436-4444. [PMID: 35370355 PMCID: PMC8972958 DOI: 10.1021/acs.iecr.2c00104] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 03/04/2022] [Accepted: 03/08/2022] [Indexed: 11/28/2022]
Abstract
![]()
Within a spent nuclear
fuel recycling strategy, in the past few
years, the pyridine-bis-triazole unit was found to be rather effective
and selective in minor actinide (MA) separation from synthetic high
active raffinate (HAR). In this research work, the main features of
the recently studied PTEH ligand were investigated in
order to evaluate its potentialities in SANEX-like processes. Its
applicability in advanced separation processes was demonstrated, even
at process temperatures. It manifested satisfactory extraction properties
for a successful selective An separation from Ln, easy cation release,
and adequate extraction kinetics as well as outstanding hydrolytical
and radiolytical stability. All the results collected in this work
allowed the scientists on the committee of the H2020 GENIORS project
to promote PTEH as a concrete alternative to the reference
CyMe4-BTBP ligand.
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Affiliation(s)
- Annalisa Ossola
- Department of Energy, Politecnico di Milano, Piazza L. da Vinci 32, I-20133 Milano, Italy
| | - Eros Mossini
- Department of Energy, Politecnico di Milano, Piazza L. da Vinci 32, I-20133 Milano, Italy
| | - Elena Macerata
- Department of Energy, Politecnico di Milano, Piazza L. da Vinci 32, I-20133 Milano, Italy
| | - Walter Panzeri
- C.N.R. − Consiglio Nazionale delle Ricerche, Istituto di Scienze e Tecnologie Chimiche “G. Natta” (SCITEC), Sezione “U.O.S. Milano Politecnico”, 20133 Milano, Italy
| | - Andrea Mele
- C.N.R. − Consiglio Nazionale delle Ricerche, Istituto di Scienze e Tecnologie Chimiche “G. Natta” (SCITEC), Sezione “U.O.S. Milano Politecnico”, 20133 Milano, Italy
- Department of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Piazza L. da Vinci, 32, 20133 Milano, Italy
| | - Mario Mariani
- Department of Energy, Politecnico di Milano, Piazza L. da Vinci 32, I-20133 Milano, Italy
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12
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Sun M, Xu L, Yang X, Wang S, Lei L, Xiao C. Complexation Behaviors of a Tridentate Phenanthroline Carboxamide Ligand with Trivalent f-Block Elements in Different Anion Systems: A Thermodynamic and Crystallographic Perspective. Inorg Chem 2022; 61:2824-2834. [PMID: 35104133 DOI: 10.1021/acs.inorgchem.1c03270] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The counteranion has a strong influence on the complexation behavior of tridentate phenanthroline carboxamide ligands with actinides and lanthanides, but the thermodynamic and underlying interaction mechanism at the molecular level is still not clear. In this work, a tridentate ligand, N-ethyl-N-tolyl-2-amide-1,10-phenanthroline (Et-Tol-PTA), was synthesized, and the effects of different anions (Cl-, NO3-, and ClO4-) on the complexation behavior of Et-Tol-PTA with typical lanthanides were thoroughly studied by using 1H nuclear magnetic resonance (NMR) spectroscopy, ultraviolet-visible (UV-vis) spectrophotometry, and single-crystal X-ray diffraction. The NMR spectroscopic titration of Lu(III) showed that there were three species (1:1, 2:1, and 3:1 ligand-metal complexes) formed in Cl- solution systems while two species (2:1 and 1:1) were formed in NO3- and ClO4- solution systems. When Et-Tol-PTA was titrated with La(III), two species (2:1 and 1:1) were formed in NO3- systems and only one species (1:1) was formed in Cl- and ClO4- systems. In addition, the stability constant was determined via UV-vis spectroscopic titration, which showed that the complexation strength between Et-Tol-PTA and Eu(III) decreased in the following order: ClO4- > NO3- > Cl-. This indicated that Et-Tol-PTA had the strongest complexation ability with Eu(III) in the ClO4- system. The structures of Et-Tol-PTA complexed with EuCl3, Eu(NO3)3, and Eu(ClO4)3 were further elucidated by single-crystal X-ray diffraction and agreed well with the results of UV-vis titration experiments. The results of this work revealed that the mechanisms of complexation of lanthanides with the asymmetric ligand Et-Tol-PTA were strongly affected by different anionic environments in solution and in the solid state. These findings may lead to the improvement of the separation of trivalent actinides and lanthanides in nuclear waste.
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Affiliation(s)
- Mingze Sun
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Lei Xu
- Institute of Nuclear Agricultural Sciences, Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agriculture and Zhejiang Province, Zhejiang University, Hangzhou 310058, China
| | - Xiao Yang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Shihui Wang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Lecheng Lei
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Chengliang Xiao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
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13
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Pruessmann T, Nagel P, Simonelli L, Batchelor D, Gordon R, Schimmelpfennig B, Trumm M, Vitova T. Opportunities and challenges of applying advanced X-ray spectroscopy to actinide and lanthanide N-donor ligand systems. JOURNAL OF SYNCHROTRON RADIATION 2022; 29:53-66. [PMID: 34985423 PMCID: PMC8733980 DOI: 10.1107/s1600577521012091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 11/12/2021] [Indexed: 06/14/2023]
Abstract
N-donor ligands such as n-Pr-BTP [2,6-bis(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine] preferentially bind trivalent actinides (An3+) over trivalent lanthanides (Ln3+) in liquid-liquid separation. However, the chemical and physical processes responsible for this selectivity are not yet well understood. Here, an explorative comparative X-ray spectroscopy and computational (L3-edge) study for the An/Ln L3-edge and the N K-edge of [An/Ln(n-Pr-BTP)3](NO3)3, [Ln(n-Pr-BTP)3](CF3SO3)3 and [Ln(n-Pr-BTP)3](ClO4)3 complexes is presented. High-resolution X-ray absorption near-edge structure (HR-XANES) L3-edge data reveal additional features in the pre- and post-edge range of the spectra that are investigated using the quantum chemical codes FEFF and FDMNES. X-ray Raman spectroscopy studies demonstrate the applicability of this novel technique for investigations of liquid samples of partitioning systems at the N K-edge.
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Affiliation(s)
- Tim Pruessmann
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Peter Nagel
- Institute for Quantum Materials and Technologies, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
| | - Laura Simonelli
- ALBA Synchrotron Light Facility, Cerdanyola del Vallès 08290, Spain
| | - David Batchelor
- Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Robert Gordon
- PNCSRF, APS Sector 20, Argonne, IL 60439, USA
- Moyie Institute, Burnaby, BC, Canada
| | - Bernd Schimmelpfennig
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Michael Trumm
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Tonya Vitova
- Institute for Nuclear Waste Disposal, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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14
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Schmidt H, Wilden A, Modolo G, Bosbach D, Santiago-Schübel B, Hupert M, Mincher BJ, Mezyk SP, Švehla J, Grüner B, Ekberg C. Gamma and pulsed electron radiolysis studies of CyMe4BTBP and CyMe4BTPhen: Identification of radiolysis products and effects on the hydrometallurgical separation of trivalent actinides and lanthanides. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2021.109696] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Xu L, Hao Y, Yang X, Wang Z, Xu C, Borisova NE, Sun M, Zhang X, Lei L, Xiao C. Comparative Investigation into the Complexation and Extraction Properties of Tridentate and Tetradentate Phosphine Oxide-Functionalized 1,10-Phenanthroline Ligands toward Lanthanides and Actinides. Chemistry 2021; 27:10717-10730. [PMID: 34002918 DOI: 10.1002/chem.202101224] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Indexed: 11/06/2022]
Abstract
Two new phosphine oxide-functionalized 1,10-phenanthroline ligands, tetradentate 2,9-bis(butylphenylphosphine oxide)-1,10-phenanthroline (BuPh-BPPhen, L1 ) and tridentate 2-(butylphenylphosphine oxide)-1,10-phenanthroline (BuPh-MPPhen, L2 ), were synthesized and studied comparatively for their coordination with trivalent actinides and lanthanides. The complexation mechanisms of these two ligands toward trivalent f-block elements were thoroughly elucidated by NMR spectroscopy, UV/vis spectrophotometry, fluorescence spectrometry, single-crystal X-ray diffraction, solvent extraction, and theoretical calculation methods. NMR titration results demonstrated that 1 : 1 and 1 : 2 (metal to ligand) lanthanides complexes formed for L1 , whereas 1 : 1, 1 : 2 and 1 : 3 lanthanide complexes formed for L2 in methanol. The formation of these species was validated by fluorescence spectrometry, and the corresponding stability constants for the complexes of NdIII with L1 and L2 were determined by using UV/vis spectrophotometry. Structures of the 10-coordinated 1 : 1-type complexes of EuL1 (NO3 )3 and [EuL2 (NO3 )3 (H2 O)] Et2 O in the solid state were characterized by X-ray crystallography. In solvent-extraction experiments, L1 exhibited extremely strong extraction ability for both AmIII and EuIII , whereas L2 showed nearly no extraction toward AmIII or EuIII due to its high hydrophilicity. Finally, the structures and bonding natures of the complex species formed between AmIII /EuIII and L1 /L2 were analyzed in DFT calculations.
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Affiliation(s)
- Lei Xu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Yuxun Hao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Xiao Yang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Zhipeng Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P. R. China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P. R. China
| | - Nataliya E Borisova
- Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, GSP-1, 119991, Moscow, Russian Federation
| | - Mingze Sun
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Xingwang Zhang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Lecheng Lei
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Chengliang Xiao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
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16
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Mossini E, Macerata E, Boubals N, Berthon C, Charbonnel MC, Mariani M. Effects of Gamma Irradiation on the Extraction Properties of Innovative Stripping Solvents for i-SANEX/GANEX Processes. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01236] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Eros Mossini
- Department of Energy—Nuclear Engineering Division, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milano 20133, Italy
| | - Elena Macerata
- Department of Energy—Nuclear Engineering Division, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milano 20133, Italy
| | - Nathalie Boubals
- CEA, DES, ISEC, DMRC, University of Montpellier, Marcoule, Bagnols-sur-Cèze F-30207, France
| | - Claude Berthon
- CEA, DES, ISEC, DMRC, University of Montpellier, Marcoule, Bagnols-sur-Cèze F-30207, France
| | | | - Mario Mariani
- Department of Energy—Nuclear Engineering Division, Politecnico di Milano, Piazza Leonardo da Vinci 32, Milano 20133, Italy
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17
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Yang XF, Ren P, Yang Q, Geng JS, Zhang JY, Yuan LY, Tang HB, Chai ZF, Shi WQ. Strong Periodic Tendency of Trivalent Lanthanides Coordinated with a Phenanthroline-Based Ligand: Cascade Countercurrent Extraction, Spectroscopy, and Crystallography. Inorg Chem 2021; 60:9745-9756. [PMID: 34115461 DOI: 10.1021/acs.inorgchem.1c01035] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Phenanthroline-diamide ligands have been reported in the selective separation of actinides over Eu(III); on the contrary, relevant basic coordination chemistry studies are still limited, and extraction under actual application conditions is rarely involved. In this work, N,N'-diethyl-N,N'-ditolyl-2,9-diamide-1,10-phenanthroline [Et-Tol-DAPhen (L)] was applied to explore the coordination performance of lanthanides in simulative high-level liquid waste. For the first time, cascade countercurrent extraction was conducted with Et-Tol-DAPhen as the extractant, which reveals the periodic tendency of the extraction efficiency of lanthanides to decrease gradually as the atomic number increases. Comparison of elements with similar radii verifies the hypothesis that the increase in the atomic number leads to a decrease in the ionic radius, thus reducing the coordination and extraction capacity of ligands. Slope analysis, electrospray ionization mass spectrometry, and ultraviolet-visible titration results show that the ligand forms 1:1 and 1:2 complexes with lanthanides and the coordination ability follows the tendency of extraction efficiency, and the first crystal structures of Lns(III) with a phenanthroline-diamide ligand, i.e., [LaL(NO3)3(H2O)] and [LaL2(NO3)2][(NO3)], were obtained, which confirms the conclusions described above. This work promises to enhance our comprehension of the chemical properties of Lns(III) and offer new clues for the design and synthesis of novel separation ligands.
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Affiliation(s)
- Xiao-Fan Yang
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,Department of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, China
| | - Peng Ren
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,School of Nuclear Science and Engineering, East China University of Technology, Nanchang, Jiangxi 330013, China
| | - Qi Yang
- Department of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, China
| | - Jun-Shan Geng
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Jin-Yu Zhang
- Department of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, China
| | - Li-Yong Yuan
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Hong-Bin Tang
- Department of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, China
| | - Zhi-Fang Chai
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,Engineer Laboratory of Advanced Energy Materials, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, 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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Meng R, Xu L, Yang X, Sun M, Xu C, Borisova NE, Zhang X, Lei L, Xiao C. Influence of a N-Heterocyclic Core on the Binding Capability of N,O-Hybrid Diamide Ligands toward Trivalent Lanthanides and Actinides. Inorg Chem 2021; 60:8754-8764. [PMID: 34077191 DOI: 10.1021/acs.inorgchem.1c00715] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
N,O-hybrid diamide ligands with N-heterocyclic skeletons are one of the promising extractants for the selective separation of actinides over lanthanides in a highly acidic HNO3 solution. In this work, three hard-soft donor mixed diamide ligands, pyridine-2,6-diylbis(pyrrolidin-1-ylmethanone) (Pyr-PyDA), 2,2'-bipyridine-6,6'-diylbis(pyr-rolidine-1-ylmethanone) (Pyr-BPyDA), and (1,10-phenanthroline-2,9-diyl)bis(pyrrolidin-1-ylmethanone) (Pyr-DAPhen), were synthesized and used to probe the influence of N-heterocyclic cores on the complexation and extraction behaviors with trivalent lanthanides and actinides. 1H NMR titration experiments demonstrated that 1:1 metal-to-ligand complexes were mainly formed between the three ligands and lanthanides, but 1:2 type complexes were also formed between tridentate Pyr-PyDA and Lu(III). The stability constants (log β) of these three ligands with two typical lanthanides, Nd(III) and Eu(III), were determined through spectrophotometric titration. It is found that Pyr-DAPhen formed the most stable complexes, while Pyr-PyDA formed the most unstable complexes with lanthanides, which coincided well with the following solvent extraction results. The solid-state structures of 1:1 type complexes of these three ligands with La(III), Nd(III), and Er(III) in nitrate media were identified by a single-crystal X-ray diffraction technique. Nd(III) and Er(III) were 10-coordinated with Pyr-PyDA, Pyr-BPyDA, and Pyr-DAPhen via one ligand molecule and three nitrate ions. La(III), because of its larger ionic radius, was 11-coordinated with Pyr-DAPhen through one ligand molecule, three nitrate ions, and one methanol molecule. Solvent extraction experiments showed that the preorganized phenanthroline-derived Pyr-DAPhen had the best extraction performance for trivalent actinide among the three ligands tested. This work provides some experimental insights into the design of more efficient ligands for trivalent actinide separation by adjusting the N-heterocyclic cores.
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Affiliation(s)
- Ruixue Meng
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.,Institute of Zhejiang University-Quzhou, 78 Jiuhua Boulevard North, Quzhou 324000, China
| | - Lei Xu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xiao Yang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Mingze Sun
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Nataliya E Borisova
- Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, GSP-1, Moscow 119991, Russian Federation
| | - Xingwang Zhang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.,Institute of Zhejiang University-Quzhou, 78 Jiuhua Boulevard North, Quzhou 324000, China
| | - Lecheng Lei
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.,Institute of Zhejiang University-Quzhou, 78 Jiuhua Boulevard North, Quzhou 324000, China
| | - Chengliang Xiao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.,Institute of Zhejiang University-Quzhou, 78 Jiuhua Boulevard North, Quzhou 324000, China
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19
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Kofod N, Nawrocki P, Platas-Iglesias C, Sørensen TJ. Electronic Structure of Ytterbium(III) Solvates-a Combined Spectroscopic and Theoretical Study. Inorg Chem 2021; 60:7453-7464. [PMID: 33949865 DOI: 10.1021/acs.inorgchem.1c00743] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The wide range of optical and magnetic properties of lanthanide(III) ions is associated with their intricate electronic structures which, in contrast to lighter elements, is characterized by strong relativistic effects and spin-orbit coupling. Nevertheless, computational methods are now capable of describing the ladder of electronic energy levels of the simpler trivalent lanthanide ions, as well as the lowest energy term of most of the series. The electronic energy levels result from electron configurations that are first split by spin-orbit coupling into groups of energy levels denoted by the corresponding Russell-Saunders terms. Each of these groups are then split by the ligand field into the actual electronic energy levels known as microstates or sometimes mJ levels. The ligand-field splitting directly informs on the coordination geometry and is a valuable tool for determining the structure and thus correlating the structure and properties of metal complexes in solution. The issue with lanthanide complexes is that the determination of complex structures from ligand-field splitting remains a very challenging task. In this paper, the optical spectra-absorption, luminescence excitation, and luminescence emission-of ytterbium(III) solvates were recorded in water, methanol, dimethyl sulfoxide (DMSO), and N,N-dimethylformamide (DMF). The electronic energy levels, that is, the microstates, were resolved experimentally. Subsequently, density functional theory calculations were used to model the structures of the solvates, and ab initio relativistic complete active space self-consistent field calculations (CASSCF) were employed to obtain the microstates of the possible structures of each solvate. By comparing the experimental and theoretical data, it was possible to determine both the coordination number and solution structure of each solvate. In water, methanol, and N,N-dimethylformamide, the solvates were found to be eight-coordinated and have a square antiprismatic coordination geometry. In DMSO, the speciation was found to be more complicated. The robust methodology developed for comparing experimental spectra and computational results allows the solution structures of homoleptic lanthanide complexes to be determined.
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Affiliation(s)
- Nicolaj Kofod
- Department of Chemistry and Nano-Science Center, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
| | - Patrick Nawrocki
- Department of Chemistry and Nano-Science Center, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas and Departamento de Química, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Thomas Just Sørensen
- Department of Chemistry and Nano-Science Center, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
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20
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Xu L, Yang X, Wang Z, Wang S, Sun M, Xu C, Zhang X, Lei L, Xiao C. Unfolding the Extraction and Complexation Behaviors of Trivalent f-Block Elements by a Tetradentate N,O-Hybrid Phenanthroline Derived Phosphine Oxide Ligand. Inorg Chem 2021; 60:2805-2815. [PMID: 33502197 DOI: 10.1021/acs.inorgchem.0c03727] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In this work, a tetradentate N,O-hybrid 2,9-bis(diphenylphosphine oxide)-1,10-phenanthroline (Ph2-BPPhen) ligand was studied for the coextraction of trivalent f-block elements from nitric acid media. The extraction as well as the complexation behaviors of Ph2-BPPhen with f-block elements were thoroughly investigated using 31P and 1H NMR spectrometry, UV-vis spectrophotometry, single crystal X-ray diffraction, and density functional theoretical (DFT) calculation. Ph2-BPPhen exhibits remarkably extraction ability for both Am(III) and Eu(III) and more than 99.5% of Am(III) and Eu(III) were extracted from 1.0 M HNO3 solution. Slope analysis suggests that both 2:1 and 1:1 ligand/metal complexes were probably formed during the extraction. The 1:1 and 2:1 Ln(III) complexes with Ph2-BPPhen were also identified in CH3OH solution by NMR spectrometry, and the stability constants were determined via UV-vis spectrophotometry. Structures of the 1:1 Eu(Ph2-BPPhen)(NO3)3 and Am(Ph2-BPPhen)(NO3)3 complexes were further elucidated by single X-ray crystallography and DFT calculations. The higher extractability of Ph2-BPPhen toward trivalent Am(III) and Eu(III) compared with the previously reported phenanthroline-derived amide and phosphonate ligands was attributed to the stronger affinity of the -P═O(R)2 group to metal ions. The results from this work indicate that the N,O-hybrid 1,10-phenanthroline derived phosphine oxide ligand can serve as a new and promising candidate for coextraction of trivalent f-block elements in the treatment of nuclear waste.
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Affiliation(s)
- Lei Xu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.,Institute of Zhejiang University-Quzhou, 78 Jiuhua Boulevard North, Quzhou 324000, China
| | - Xiao Yang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.,Institute of Zhejiang University-Quzhou, 78 Jiuhua Boulevard North, Quzhou 324000, China
| | - Zhipeng Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Shihui Wang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.,Institute of Zhejiang University-Quzhou, 78 Jiuhua Boulevard North, Quzhou 324000, China
| | - Mingze Sun
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.,Institute of Zhejiang University-Quzhou, 78 Jiuhua Boulevard North, Quzhou 324000, China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Xingwang Zhang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.,Institute of Zhejiang University-Quzhou, 78 Jiuhua Boulevard North, Quzhou 324000, China
| | - Lecheng Lei
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.,Institute of Zhejiang University-Quzhou, 78 Jiuhua Boulevard North, Quzhou 324000, China
| | - Chengliang Xiao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.,Institute of Zhejiang University-Quzhou, 78 Jiuhua Boulevard North, Quzhou 324000, China
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21
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Geist A, Panak PJ. Recent Progress in Trivalent Actinide and Lanthanide Solvent Extraction and Coordination Chemistry with Triazinylpyridine N Donor Ligands. SOLVENT EXTRACTION AND ION EXCHANGE 2021. [DOI: 10.1080/07366299.2020.1831235] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Andreas Geist
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), Karlsruhe, Germany
| | - Petra J. Panak
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), Karlsruhe, Germany
- Physikalisch Chemisches Institut (PCI), Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
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22
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Colombo Dugoni G, Mossini E, Macerata E, Sacchetti A, Mele A, Mariani M. Deep Eutectic Solvents: Promising Co-solvents to Improve the Extraction Kinetics of CyMe 4-BTBP. ACS OMEGA 2021; 6:3602-3611. [PMID: 33644525 PMCID: PMC7906495 DOI: 10.1021/acsomega.0c05109] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 12/31/2020] [Indexed: 06/12/2023]
Abstract
In this communication, we report on the use of deep eutectic solvents (DESs) for processing nuclear waste, with a view to selectively recovering minor actinides (MA) from highly active raffinate solutions. DESs are an interesting new class of green and eco-sustainable solvents. Herein, a representative family of DES was tested as a co-solvent for MA/lanthanides partitioning based on Selective ActiNide EXtraction (SANEX)-like hydrometallurgical processes. The reference system exploits the CyMe4-BTBP lipophilic extractant for selective MA recovery, but the slow kinetics is the main limitation toward the industrial implementation. A selection of hydrophilic DESs has been proposed as a phase transfer catalyst and tested to improve the process performances. In this work, the radiochemical stability and the extraction behavior of these DESs have been ascertained. Moreover, a preliminary optimization of system composition has been achieved. This study underlines a catalytic effect of DES that can be proficiently exploited to enhance CyMe4-BTBP extraction and selectivity.
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Affiliation(s)
- Greta Colombo Dugoni
- Department
of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Piazza L. da Vinci, 32, I-20133 Milano, Italy
| | - Eros Mossini
- Department
of Energy - Nuclear Engineering Division, Politecnico di Milano, P.zza L. da Vinci 32, I-20133 Milano, Italy
| | - Elena Macerata
- Department
of Energy - Nuclear Engineering Division, Politecnico di Milano, P.zza L. da Vinci 32, I-20133 Milano, Italy
| | - Alessandro Sacchetti
- Department
of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Piazza L. da Vinci, 32, I-20133 Milano, Italy
| | - Andrea Mele
- Department
of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, Piazza L. da Vinci, 32, I-20133 Milano, Italy
| | - Mario Mariani
- Department
of Energy - Nuclear Engineering Division, Politecnico di Milano, P.zza L. da Vinci 32, I-20133 Milano, Italy
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23
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Sittel T, Trumm M, Adam C, Geist A, Panak PJ. Impact of Solvent Polarity on the Ligand Configuration in Tetravalent Thorium N-Donor Complexes. Inorg Chem 2021; 60:1092-1098. [PMID: 33405914 DOI: 10.1021/acs.inorgchem.0c03213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A combined NMR spectroscopic and theoretical study on the complexation of diamagnetic Th(IV) with 2,6-bis(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine (nPr-BTP) was performed. Different ligand configurations were observed for [Th(nPr-BTP)3]4+ complexes depending on the solvent's ability to actively form hydrogen bonds. In polar aprotic solvents, a complex is observed, which is isostructural with [M(nPr-BTP)3]3+ (M = Am, Ln) complexes studied earlier. In contrast, 1H, 13C, and 15N NMR spectra recorded in polar protic solvents showed twice as many signals, indicating a breakdown of symmetry. Supported by density functional theory (DFT) calculations, this difference is explained by the solvent effect on the steric arrangement of the propyl moieties located on the triazine rings. Important information on bonding properties was obtained by 15N NMR. In contrast to the respective Am(III) complex showing a significant covalent contribution, the Th(IV)-BTP interaction is mainly electrostatic.
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Affiliation(s)
- Thomas Sittel
- Ruprecht-Karls-Universität Heidelberg, Institut für Physikalische Chemie, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany.,Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Michael Trumm
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Christian Adam
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Andreas Geist
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Petra J Panak
- Ruprecht-Karls-Universität Heidelberg, Institut für Physikalische Chemie, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany.,Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany
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24
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Xu C, Sun T, Yuan J, Feng X, Duan W, Wang S, He Q, Chen J. Improving the Robustness of Trivalent Actinides/Lanthanides Separation by Bis(2,4,4-trimethylpentyl)dithiophosphinic Acid: Batch Extraction and Process Demonstration. SOLVENT EXTRACTION AND ION EXCHANGE 2020. [DOI: 10.1080/07366299.2020.1846270] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China
| | - Taoxiang Sun
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China
| | - Jianhua Yuan
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China
| | - Xiaogui Feng
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China
| | - Wuhua Duan
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China
| | - Shuwei Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China
| | - Qiange He
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China
| | - Jing Chen
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, China
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25
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Andreev G, Budantseva N. Neptunium(V) Complexes with Lipophilic N‐Donor Extractant Ligands. ChemistrySelect 2020. [DOI: 10.1002/slct.202004025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Grigory Andreev
- Institute of Physical Chemistry and Electrochemistry 31 Leninskiy pr. Moscow 119071 Russia
| | - Nina Budantseva
- Institute of Physical Chemistry and Electrochemistry 31 Leninskiy pr. Moscow 119071 Russia
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26
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Weßling P, Schenk T, Braun F, Beele BB, Trumm S, Trumm M, Schimmelpfennig B, Schild D, Geist A, Panak PJ. Trivalent Actinide Ions Showing Tenfold Coordination in Solution. Inorg Chem 2020; 59:12410-12421. [PMID: 32794734 DOI: 10.1021/acs.inorgchem.0c01526] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Trivalent actinides generally exhibit ninefold coordination in solution. 2,6-Bis(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine (nPr-BTP), a tridentate nitrogen donor ligand, is known to form ninefold coordinated 1:3 complexes, [An(nPr-BTP)3]3+ (An = U, Pu, Am, Cm) in solution. We report a Cm(III) complex with tenfold coordination in solution, [Cm(nPr-BTP)3(NO3)]2+. This species was identified using time-resolved laser fluorescence spectroscopy (TRLFS), vibronic side band spectroscopy (VSBS), X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT). Adding nitrate to a solution of the [Cm(nPr-BTP)3]3+ complex in 2-propanol shifts the Cm(III) emission band from 613.1 to 617.3 nm. This bathochromic shift is due to a higher coordination number of the Cm(III) ion in solution, in agreement with the formation of the [Cm(nPr-BTP)3(NO3)]2+ complex. The formation of this complex exhibits slow kinetics in the range of 5 to 12 days, depending on the water content of the solvent. Formation of a complex [Cm(nPr-BTP)3(X)]2+ was not observed for anions other than nitrate (X- = NO2-, CN-, or OTf-). The formation of the [Cm(nPr-BTP)3(NO3)]2+ complex was studied as a function of NO3- and nPr-BTP concentrations, and slope analyses confirmed the addition of one nitrate anion to the [Cm(nPr-BTP)3]3+ complex. Experiments with varied nPr-BTP concentration show that [Cm(nPr-BTP)3(NO3)]2+ only forms at nPr-BTP concentrations below 10-4 mol/L whereas for concentrations greater than 10-4 mol/L the formation of the tenfold species is suppressed and [Cm(nPr-BTP)3]3+ is the only species present. The presence of the tenfold coordinated complex is supported by VSBS, XPS, and DFT calculations. The vibronic side band of the [Cm(nPr-BTP)3(NO3)]2+ complex exhibits a nitrate stretching mode not observed in the [Cm(nPr-BTP)3]3+ complex. Moreover, XPS on [M(nPr-BTP)3(NO3)](NO3)2 (M = Eu, Am) yields signals from both non-coordinated and coordinated nitrate. Finally, DFT calculations reveal that the energetically most favored structure is obtained if the nitrate is positioned on the C2 axis of the D3 symmetrical [Cm(nPr-BTP)3]3+ complex with a bond distance of 413 pm. Combining results from TRLFS, VSBS, XPS, and DFT provides sound evidence for a unique tenfold coordinated Cm(III) complex in solution-a novelty in An(III) solution chemistry.
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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.,Ruprecht-Karls-Universität Heidelberg, Institut für Physikalische Chemie, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - Tobias Schenk
- Ruprecht-Karls-Universität Heidelberg, Institut für Physikalische Chemie, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - Felix Braun
- Ruprecht-Karls-Universität Heidelberg, Institut für Physikalische Chemie, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - Björn B Beele
- Bergische Universität Wuppertal, Inorganic Chemistry, Gaußstraße 20, 42119 Wuppertal, Germany
| | - Sascha Trumm
- Karlsruhe Institute of Technology (KIT), Center for Advanced Technological and Environmental Training (FTU), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Michael Trumm
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Bernd Schimmelpfennig
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Dieter Schild
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Andreas Geist
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Petra J Panak
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe, Germany.,Ruprecht-Karls-Universität Heidelberg, Institut für Physikalische Chemie, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
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27
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Lyseid Authen T, Wilden A, Halleröd J, Schneider D, Kreft F, Modolo G, Ekberg C. Batch Tests for Optimisation of Solvent Composition and Process Flexibility of the CHALMEX FS-13 Process. SOLVENT EXTRACTION AND ION EXCHANGE 2020. [DOI: 10.1080/07366299.2020.1797988] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Thea Lyseid Authen
- Division of Nuclear Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Andreas Wilden
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung, Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Jülich, Germany
| | - Jenny Halleröd
- Division of Nuclear Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Dimitri Schneider
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung, Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Jülich, Germany
| | - Fabian Kreft
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung, Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Jülich, Germany
| | - Giuseppe Modolo
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung, Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Jülich, Germany
| | - Christian Ekberg
- Division of Nuclear Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
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28
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Geist A, Adnet JM, Bourg S, Ekberg C, Galán H, Guilbaud P, Miguirditchian M, Modolo G, Rhodes C, Taylor R. An overview of solvent extraction processes developed in Europe for advanced nuclear fuel recycling, part 1 — heterogeneous recycling. SEP SCI TECHNOL 2020. [DOI: 10.1080/01496395.2020.1795680] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Andreas Geist
- Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), Karlsruhe, Germany
| | - Jean-Marc Adnet
- French Alternative Energies and Atomic Energy Commission, CEA/DES/ISEC/DMRC, University of Montpellier, Marcoule, France
| | - Stéphane Bourg
- French Alternative Energies and Atomic Energy Commission, CEA/DES/ISEC/DMRC, University of Montpellier, Marcoule, France
| | - Christian Ekberg
- Nuclear Chemistry, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Hitos Galán
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
| | - Philippe Guilbaud
- French Alternative Energies and Atomic Energy Commission, CEA/DES/ISEC/DMRC, University of Montpellier, Marcoule, France
| | - Manuel Miguirditchian
- French Alternative Energies and Atomic Energy Commission, CEA/DES/ISEC/DMRC, University of Montpellier, Marcoule, France
| | - Giuseppe Modolo
- Forschungszentrum Jülich GmbH (FZJ), Institut für Energie- und Klimaforschung, Nukleare Entsorgung und Reaktorsicherheit (IEK-6), Jülich, Germany
| | - Chris Rhodes
- National Nuclear Laboratory, Central Laboratory, Seascale, UK
| | - Robin Taylor
- National Nuclear Laboratory, Central Laboratory, Seascale, UK
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29
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Jian T, Yu X, Dan D, Albrecht-Schmitt TE, Autschbach J, Gibson JK. Gas-Phase Complexes of Americium and Lanthanides with a Bis-triazinyl Pyridine: Reactivity and Bonding of Archetypes for F-Element Separations. J Phys Chem A 2020; 124:2982-2990. [PMID: 32207621 DOI: 10.1021/acs.jpca.0c00675] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Bis-triazinyl pyridines (BTPs) exhibit solution selectivity for trivalent americium over lanthanides (Ln), the origins of which remain uncertain. Here, electrospray ionization was used to generate gas-phase complexes [ML3]3+, where M = La, Lu, or Am and L is EtBTP 2,6-bis(5,6-diethyl-1,2,4-triazin-3-yl)-pyridine. Collision-induced dissociation (CID) of [ML3]3+ in the presence of H2O yielded a protonated ligand [L(H)]+ and hydroxide [ML2(OH)]2+ or hydrate [ML(L-H)(H2O)]2+, where (L-H)- is a deprotonated ligand. Although solution affinities indicate stronger binding of BTPs toward Am3+ versus Ln3+, the observed CID process is contrastingly more facile for M = Am versus Ln. To understand the disparity, density functional theory was employed to compute potential energy surfaces for two possible CID processes, for M = La and Am. In accordance with the CID results, both the rate determining transition state barrier and the net energy are lower for [AmL3]3+ versus [LaL3]3+ and for both product isomers, [ML2(OH)]2+ and [ML(L-H)(H2O)]2+. More facile removal of a ligand from [AmL3]3+ by CID does not necessarily contradict stronger Am3+-L binding, as inferred from solution behavior. In particular, the formation of new bonds in the products can distort kinetics and thermodynamics expected for simple bond cleavage reactions. In addition to correctly predicting the seemingly anomalous CID behavior, the computational results indicate greater participation of Am 5f versus La 4f orbitals in metal-ligand bonding.
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Affiliation(s)
- Tian Jian
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Xiaojuan Yu
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
| | - David Dan
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, Florida 32306, United States
| | - Thomas E Albrecht-Schmitt
- Department of Chemistry and Biochemistry, Florida State University, 95 Chieftain Way, Tallahassee, Florida 32306, United States
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
| | - John K Gibson
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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30
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Kofod N, Nawrocki P, Juelsholt M, Christiansen TL, Jensen KMØ, Sørensen TJ. Solution Structure, Electronic Energy Levels, and Photophysical Properties of [Eu(MeOH)n−2m(NO3)m]3–m+ Complexes. Inorg Chem 2020; 59:10409-10421. [DOI: 10.1021/acs.inorgchem.0c00056] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Nicolaj Kofod
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
| | - Patrick Nawrocki
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
| | - Mikkel Juelsholt
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
| | - Troels Lindahl Christiansen
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
| | - Kirsten M. Ø. Jensen
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
| | - Thomas Just Sørensen
- Nano-Science Center & Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 København Ø, Denmark
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31
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Yang X, Su D, Song L, Wang X, Xiao Q, Feng Q, Ding S. Extraction and complexation of americium(III) and europium(III) by a N-donor ligand of 3,5-bis(2-pyridyl)pyrazole. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.115969] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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32
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Xu L, Pu N, Ye G, Xu C, Chen J, Zhang X, Lei L, Xiao C. Unraveling the complexation mechanism of actinide(iii) and lanthanide(iii) with a new tetradentate phenanthroline-derived phosphonate ligand. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00200c] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The separation and complexation mechanisms of actinide(iii) and lanthanide(iii) with a new phenanthroline-derived phosphonate ligand were studied experimentally and theoretically.
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Affiliation(s)
- Lei Xu
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Ning Pu
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing 100084
- China
| | - Gaoyang Ye
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing 100084
- China
| | - Chao Xu
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing 100084
- China
| | - Jing Chen
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing 100084
- China
| | - Xingwang Zhang
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Lecheng Lei
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Chengliang Xiao
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
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33
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Optimization of Baicalin, Wogonoside, and Chlorogenic Acid Water Extraction Process from the Roots of Scutellariae Radix and Lonicerae japonicae Flos Using Response Surface Methodology (RSM). Processes (Basel) 2019. [DOI: 10.3390/pr7110854] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this study, a simultaneous water extraction process for baicalin, wogonoside, and chlorogenic acid has been optimized. The effect of extraction temperature, extraction time, and liquid–solid ratio was scrutinized by single factor experiments and further analyzed by Box–Behnken design (BBD) approach using response surface methodology (RSM). The extraction yield of investigated compounds was determined by high performance liquid chromatography (HPLC). Single-factor experiments and response surface analysis results revealed that the optimized conditions are: Liquid to solid ratio 25:1 (mL/g), extraction temperature 93 °C, extraction time 2.4 h, and the extraction cycle two. Importantly, it has been noted that under the above conditions, concentrations of baicalin, wogonoside, and chlorogenic were 0.078, 0.031, and 0.013 mg/mL, respectively, and the overall desirability (OD) value was 0.76 which was higher than the non-optimized conditions and the deviation from the predicted OD value was only 2.44%. Conclusively, it has been suggested that the model was stable and feasible, and fit for extraction of baicalin, wogonoside, and chlorogenic acid from Scutellariae Radix and Lonicerae (L.) japonicae Flos.
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34
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Zaytsev AV, Bulmer R, Kozhevnikov VN, Sims M, Modolo G, Wilden A, Waddell PG, Geist A, Panak PJ, Wessling P, Lewis FW. Exploring the Subtle Effect of Aliphatic Ring Size on Minor Actinide-Extraction Properties and Metal Ion Speciation in Bis-1,2,4-Triazine Ligands. Chemistry 2019; 26:428-437. [PMID: 31489718 PMCID: PMC7027750 DOI: 10.1002/chem.201903685] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Indexed: 11/06/2022]
Abstract
The synthesis and evaluation of three novel bis-1,2,4-triazine ligands containing five-membered aliphatic rings are reported. Compared to the more hydrophobic ligands 1-3 containing six-membered aliphatic rings, the distribution ratios for relevant f-block metal ions were approximately one order of magnitude lower in each case. Ligand 10 showed an efficient, selective and rapid separation of AmIII and CmIII from nitric acid. The speciation of the ligands with trivalent f-block metal ions was probed using NMR titrations and competition experiments, time-resolved laser fluorescence spectroscopy and X-ray crystallography. While the tetradentate ligands 8 and 10 formed LnIII complexes of the same stoichiometry as their more hydrophobic analogues 2 and 3, significant differences in speciation were observed between the two classes of ligand, with a lower percentage of the extracted 1:2 complexes being formed for ligands 8 and 10. The structures of the solid state 1:1 and 1:2 complexes formed by 8 and 10 with YIII , LuIII and PrIII are very similar to those formed by 2 and 3 with LnIII . Ligand 10 forms CmIII and EuIII 1:2 complexes that are thermodynamically less stable than those formed by ligand 3, suggesting that less hydrophobic ligands form less stable AnIII complexes. Thus, it has been shown for the first time how tuning the cyclic aliphatic part of these ligands leads to subtle changes in their metal ion speciation, complex stability and metal extraction affinity.
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Affiliation(s)
- Andrey V Zaytsev
- Department of Applied Sciences, Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK
| | - Rachel Bulmer
- Department of Applied Sciences, Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK
| | - Valery N Kozhevnikov
- Department of Applied Sciences, Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK
| | - Mark Sims
- Department of Applied Sciences, Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK
| | - Giuseppe Modolo
- Forschungszentrum Jülich GmbH, Institut für Energie und Klimaforschung-Nukleare Entsorgung und Reaktorsicherheit (IEK-6), 52428, Jülich, Germany
| | - Andreas Wilden
- Forschungszentrum Jülich GmbH, Institut für Energie und Klimaforschung-Nukleare Entsorgung und Reaktorsicherheit (IEK-6), 52428, Jülich, Germany
| | - Paul G Waddell
- School of Natural and Environmental Sciences, Newcastle University, Kings Road, Newcastle upon Tyne, NE1 7RU, UK
| | - Andreas Geist
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), 76021, Karlsruhe, Germany
| | - Petra J Panak
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), 76021, Karlsruhe, Germany.,Ruprecht-Karls-Universität Heidelberg, Physikalisch-Chemisches Institut, Im Neuenheimer Feld 234, 69120, Heidelberg, Germany
| | - Patrik Wessling
- Institute for Nuclear Waste Disposal (INE), Karlsruhe Institute of Technology (KIT), 76021, Karlsruhe, Germany.,Ruprecht-Karls-Universität Heidelberg, Physikalisch-Chemisches Institut, Im Neuenheimer Feld 234, 69120, Heidelberg, Germany
| | - Frank W Lewis
- Department of Applied Sciences, Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK
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35
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Lan JH, Jiang SL, Liu YL, Yin XM, Wang YX, Yin TQ, Wang SA, Wang CZ, Shi WQ, Chai ZF. Separation of actinides from lanthanides associated with spent nuclear fuel reprocessing in China: current status and future perspectives. RADIOCHIM ACTA 2019. [DOI: 10.1515/ract-2019-3110] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Developing necessary reprocessing techniques to meet the remarkable increase of spent nuclear fuels (SNFs) is crucial for the sustainable development of nuclear energy. This review summarizes recent research progresses related to the SNF reprocessing in China, with an emphasis on actinides separation over lanthanides through three different techniques, hydrometallurgical reprocessing, pyrometallurgical processes, and selective crystallization based separation. Some future perspectives with respect to advanced actinide separation are also given.
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Affiliation(s)
- Jian-hui Lan
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Shi-lin Jiang
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Ya-lan Liu
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Xue-miao Yin
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University , Suzhou 215123 , China
| | - Ya-xing Wang
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University , Suzhou 215123 , China
| | - Tai-qi Yin
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences , Beijing 100049 , China
| | - Shu-ao Wang
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University , Suzhou 215123 , China
| | - Cong-zhi Wang
- 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
| | - Zhi-fang Chai
- School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University , Suzhou 215123 , China
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences , Ningbo, Zhejiang 315201 , China
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36
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Ning S, Zhang S, Zhou J, Zhang W, Wei Y. Salt-free separation of 241Am(III) from lanthanides by highly stable macroporous silica-polymer based Me2-CA-BTP/SiO2-P adsorbent. J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06777-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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37
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de Bettencourt-Dias A, Beeler RM, Zimmerman JR. Anion-π and H-Bonding Interactions Supporting Encapsulation of [Ln(NO3)6/5]3–/2– (Ln = Nd, Er) with a Triazine-Based Ligand. J Am Chem Soc 2019; 141:15102-15110. [DOI: 10.1021/jacs.9b05566] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Rose M. Beeler
- Department of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United States
| | - Joshua R. Zimmerman
- Department of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United States
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38
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Grimes TS, Heathman CR, Jansone-Popova S, Ivanov AS, Bryantsev VS, Zalupski PR. Exploring Soft Donor Character of the N-2-Pyrazinylmethyl Group by Coordinating Trivalent Actinides and Lanthanides Using Aminopolycarboxylates. Inorg Chem 2019; 59:138-150. [DOI: 10.1021/acs.inorgchem.9b01427] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Travis S. Grimes
- Aqueous Separations and Radiochemistry, Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
| | - Colt R. Heathman
- Aqueous Separations and Radiochemistry, Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
| | - Santa Jansone-Popova
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Alexander S. Ivanov
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Vyacheslav S. Bryantsev
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Peter R. Zalupski
- Aqueous Separations and Radiochemistry, Idaho National Laboratory, Idaho Falls, Idaho 83415, United States
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39
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Boda A, Ali SM. Scalar Relativistic Density Functional Theoretical Investigation of Higher Complexation Ability of Substituted 1,10-Phenanthroline over Bipyridine Towards Am 3+
/Eu 3+
Ions. Z Anorg Allg Chem 2019. [DOI: 10.1002/zaac.201800487] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anil Boda
- Chemical Engineering Division; Bhabha Atomic Research Centre; 400 085 Mumbai India
| | - Sk. Musharaf Ali
- Chemical Engineering Division; Bhabha Atomic Research Centre; 400 085 Mumbai India
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40
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Horne GP, Mezyk SP, Moulton N, Peller JR, Geist A. Time-resolved and steady-state irradiation of hydrophilic sulfonated bis-triazinyl-(bi)pyridines - modelling radiolytic degradation. Dalton Trans 2019; 48:4547-4554. [PMID: 30869725 DOI: 10.1039/c9dt00474b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Efficient separation of the actinides from the lanthanides is a critical challenge in the development of a more sophisticated spent nuclear fuel recycling process. Based upon the slight differences in f-orbital distribution, a new class of soft nitrogen-donor ligands, the sulfonated bis-triazinyl-(bi)pyridines, has been identified and shown to be successful for this separation under anticipated, large-scale treatment conditions. The radiation robustness of these ligands is key to their implementation; however, current stability studies have yielded conflicting results. Here we report on the radiolytic degradation of the sulfonated 2,6-bis(1,2,4-triazin-3-yl)pyridine (BTP(S)) and 6,6'-bis(1,2,4-triazin-3-yl)-2,2'-bipyridine (BTBP(S)) in aerated, aqueous solutions using a combination of time-resolved pulsed electron techniques to ascertain their reaction kinetics with key aqueous radiolysis products (eaq-, H˙, ˙OH, and ˙NO3), and steady state gamma radiolysis in conjunction with liquid chromatography for identification and quantification of both ligands as a function of absorbed dose. These data were used to construct a predictive deterministic model to provide critical insight into the fundamental radiolysis mechanisms responsible for the ligands' radiolytic stability. The first-order decays of BTP(S) and BTBP(S) are predominantly driven by oxidative processes (˙OH and, to a lesser extent, H2O2), for which calculations demonstrate that the rate of degradation is inhibited by the formation of ligand degradation products that undergo secondary reactions with the primary products of water radiolysis. Overall, BTP(S) is ∼20% more radiolytically stable than BTBP(S), but over 90% of either ligand is consumed within 1 kGy.
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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.
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41
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Separation of trivalent actinides and lanthanides using various ‘N’, ‘S’ and mixed ‘N,O’ donor ligands: a review. RADIOCHIM ACTA 2019. [DOI: 10.1515/ract-2018-3064] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Separation of trivalent actinide (An) and lanthanide (Ln) elements is one of the burning topics in the back end of the nuclear fuel cycle due to the similarity in their chemical behaviour. A significant amount of research is being carried out worldwide to develop suitable ligands for the separation of the trivalent actinides and lanthanides. Some of the research groups are engaged in continuous improvement of the di-ethylene-triamine-penta acetic acid (DTPA) based Ln/An separation method, whereas extensive research is going on for the development of the lipophilic and hydrophilic ‘N’ donor heteropolycyclic ligands as the actinide selective ligand. A number of ‘S’ donor ligands are also explored for the Ln/An separation. In the present review, we made an attempt to highlight various separation processes based on soft donor ligands developed for Ln/An separations. Beside the conventional solvent extraction processes, separation possibilities membrane based and solid phase extraction techniques are evaluated for the Ln/An separation and are compiled in the present review.
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42
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Kobayashi T, Akutsu K, Nakase M, Suzuki S, Shiwaku H, Yaita T. Complexation properties and structural character of lanthanides complexes of O,N-hetero donor ligand BIZA. SEP SCI TECHNOL 2019. [DOI: 10.1080/01496395.2019.1575880] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- T. Kobayashi
- Materials Sciences Research Center, Japan Atomic Energy Agency, Sayo-cho, Sayo-gun, Hyogo, Japan
| | - K. Akutsu
- Research Center for Neutron Science and Technology, Comprehensive Research Organization for Science and Society, Tokai, Ibaraki, Japan
| | - M. Nakase
- Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Meguro-ku, Tokyo, Japan
| | - S. Suzuki
- Materials Sciences Research Center, Japan Atomic Energy Agency, Sayo-cho, Sayo-gun, Hyogo, Japan
| | - H. Shiwaku
- Materials Sciences Research Center, Japan Atomic Energy Agency, Sayo-cho, Sayo-gun, Hyogo, Japan
| | - T. Yaita
- Materials Sciences Research Center, Japan Atomic Energy Agency, Sayo-cho, Sayo-gun, Hyogo, Japan
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43
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Herdzik-Koniecko I, Wagner C, Trumm M, Müllich U, Schimmelpfennig B, Narbutt J, Geist A, Panak PJ. Do An(iii) and Ln(iii) ions form heteroleptic complexes with diglycolamide and hydrophilic BT(B)P ligands in solvent extraction systems? A spectroscopic and DFT study. NEW J CHEM 2019. [DOI: 10.1039/c9nj00651f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Formation of heteroleptic complexes would explain a discrepancy between results from solvent extraction and from spectroscopy reported earlier.
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Affiliation(s)
| | - Christoph Wagner
- Karlsruhe Institute of Technology (KIT)
- Institute for Nuclear Waste Disposal (INE)
- 76021 Karlsruhe
- Germany
- Ruprecht-Karls-Universität Heidelberg
| | - Michael Trumm
- Karlsruhe Institute of Technology (KIT)
- Institute for Nuclear Waste Disposal (INE)
- 76021 Karlsruhe
- Germany
| | - Udo Müllich
- Karlsruhe Institute of Technology (KIT)
- Institute for Nuclear Waste Disposal (INE)
- 76021 Karlsruhe
- Germany
| | - Bernd Schimmelpfennig
- Karlsruhe Institute of Technology (KIT)
- Institute for Nuclear Waste Disposal (INE)
- 76021 Karlsruhe
- Germany
| | - Jerzy Narbutt
- Institute of Nuclear Chemistry and Technology (IChTJ)
- 03-195 Warsaw
- Poland
| | - Andreas Geist
- Karlsruhe Institute of Technology (KIT)
- Institute for Nuclear Waste Disposal (INE)
- 76021 Karlsruhe
- Germany
| | - Petra J. Panak
- Karlsruhe Institute of Technology (KIT)
- Institute for Nuclear Waste Disposal (INE)
- 76021 Karlsruhe
- Germany
- Ruprecht-Karls-Universität Heidelberg
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44
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Werner EJ, Biros SM. Supramolecular ligands for the extraction of lanthanide and actinide ions. Org Chem Front 2019. [DOI: 10.1039/c9qo00242a] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A selection of supramolecular ligands designed to extract f-elements.
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Affiliation(s)
- Eric J. Werner
- Department of Chemistry
- Biochemistry and Physics
- The University of Tampa
- Tampa
- USA
| | - Shannon M. Biros
- Department of Chemistry
- Grand Valley State University
- Allendale
- USA
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45
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Xu L, Zhang A, Pu N, Lu Y, Yang H, Liu Z, Ji Y. Unusual complexation behaviors of R-BTPs with water molecule and Pd(ii) caused by electronic modulation of substituents on BTP backbone: new insights into palladium separation under the framework of minor actinides’ partitioning. NEW J CHEM 2019. [DOI: 10.1039/c9nj00343f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A 1 : 1 solid palladium complex with any tridentate bis-triazine ligand has been isolated and structurally characterized for the first time.
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Affiliation(s)
- Lei Xu
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Anyun Zhang
- College of Chemical and Biological Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Ning Pu
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing 100084
- China
| | - Yanchao Lu
- College of Materials Science and Engineering
- China Jiliang University
- Hangzhou 310018
- China
| | - Hua Yang
- College of Materials Science and Engineering
- China Jiliang University
- Hangzhou 310018
- China
| | - Ziyang Liu
- College of Materials Science and Engineering
- China Jiliang University
- Hangzhou 310018
- China
| | - Yanqin Ji
- China CDC Key Laboratory of Radiological Protection and Nuclear Emergency
- National Institute for Radiological Protection
- Chinese Center for Disease Control and Prevention
- Beijing 100088
- P. R. China
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46
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Ali SM. Role of Ligand Straining in Complexation of Eu 3+-Am 3+ Ions by TPEN and PPDEN, Scalar Relativistic DFT Exploration in Conjunction with COSMO-RS. ACS OMEGA 2018; 3:13104-13116. [PMID: 31458031 PMCID: PMC6644696 DOI: 10.1021/acsomega.8b00933] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 09/28/2018] [Indexed: 06/10/2023]
Abstract
To search for new ligands suitable for the separation of minor actinides (MA) from lanthanides (Ln) in nuclear waste reprocessing, theoretical (density functional theory) studies were carried out on the complexation (structures, bonding, and thermodynamics) of La3+, Sm3+, Eu3+, and Am3+ complexes with moderately soft donor ligands TPEN [N,N,N',N'-tetrakis(2-pyridylmethyl)ethylenediamine] and PPDEN [N,N,N',N″,N″-pentakis(2-pyridylmethyl) diethylenetriamine] in aqueous and nitrobenzene solutions. B3LYP level of theory was used in conjunction with the conductor-like screening model for real systems (COSMO-RS). The metal ions in [M(NO3)2(TPEN)]NO3 and [M(NO3)(PPDEN)](NO3)2 complexes were deca-coordinated with both TPEN and PPDEN. The enthalpy of the complexation with TPEN in an aqueous solution was found to be negative, indicating the exothermic nature of the reaction as observed in the experiments. The calculated values of free energy of complexation follow the experimental trend: Am3+ > Sm3+ > La3+. Furthermore, the calculated free energy with PPDEN is reduced compared to that with TPEN, which may be attributed to the ligand straining during complex formation, which is also reflected in greater residual charges on both the Eu3+ and Am3+ central ions in the complexes of octadentate PPDEN compared to hexadentate TPEN. The experimental complexation selectivity of Am3+ over Eu3+ with TPEN is established by employing COSMO-RS. Furthermore, TPEN is Am3+-selective, whereas PPDEN is Eu3+-selective, which could be exploited for the efficient separation of MA from Ln.
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47
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Liu Y, Yang X, Ding S, Wang Z, Zhang L, Song L, Chen Z, Wang X. Highly Efficient Trivalent Americium/Europium Separation by Phenanthroline-Derived Bis(pyrazole) Ligands. Inorg Chem 2018; 57:5782-5790. [DOI: 10.1021/acs.inorgchem.8b00074] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ying Liu
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Xiuying Yang
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Songdong Ding
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Zhipeng Wang
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Lirong Zhang
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Lianjun Song
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Zhili Chen
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Xueyu Wang
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
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48
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Bhattacharyya A, Gadly T, Kanekar AS, Ghosh SK, Kumar M, Mohapatra PK. First Report on the Separation of Trivalent Lanthanides from Trivalent Actinides Using an Aqueous Soluble Multiple N-Donor Ligand, 2,6-bis(1H-tetrazol-5-yl)pyridine: Extraction, Spectroscopic, Structural, and Computational Studies. Inorg Chem 2018; 57:5096-5107. [DOI: 10.1021/acs.inorgchem.8b00142] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | - Sunil K. Ghosh
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Mukesh Kumar
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
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49
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Optimization of baicalin water extraction process from Scutellaria baicalensis (a traditional Chinese medicine) by using orthogonal test and HPLC. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2018. [DOI: 10.1016/j.bjp.2018.02.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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50
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Lewis FW, Harwood LM, Hudson MJ, Afsar A, Laventine DM, Šťastná K, John J, Distler P. Separation of the Minor Actinides Americium(III) and Curium(III) by Hydrophobic and Hydrophilic BTPhen ligands: Exploiting Differences in their Rates of Extraction and Effective Separations at Equilibrium. SOLVENT EXTRACTION AND ION EXCHANGE 2018. [DOI: 10.1080/07366299.2018.1429358] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Frank W. Lewis
- Department of Applied Sciences, Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, UK
| | | | - Michael J. Hudson
- Department of Chemistry, University of Reading, Whiteknights, Reading, UK
| | - Ashfaq Afsar
- Department of Chemistry, University of Reading, Whiteknights, Reading, UK
| | | | - Kamila Šťastná
- Department of Nuclear Chemistry, Czech Technical University in Prague, Břehová, Prague, Czech Republic
| | - Jan John
- Department of Nuclear Chemistry, Czech Technical University in Prague, Břehová, Prague, Czech Republic
| | - Petr Distler
- Department of Nuclear Chemistry, Czech Technical University in Prague, Břehová, Prague, Czech Republic
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