1
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Lei XP, Wu QY, Wang CZ, Lan JH, Chai ZF, Nie CM, Shi WQ. Theoretical Insights into the Substitution Effect of Phenanthroline Derivatives on Am(III)/Eu(III) Separation. Inorg Chem 2023; 62:2705-2714. [PMID: 36724403 DOI: 10.1021/acs.inorgchem.2c03823] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Separation of trivalent actinides (An(III)) and lanthanides (Ln(III)) poses a huge challenge in the reprocessing of spent nuclear fuel due to their similar chemical properties. N,N'-Diethyl-N,N'-ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen) is a potential ligand for the extraction of An(III) from Ln(III), while there are still few reports on the effect of its substituent including electron-withdrawing and electron-donating groups on An(III)/Ln(III) separation. Herein, the interaction of Et-Tol-DAPhen ligands modified by the electron-withdrawing groups (CF3, Br) and electron-donating groups (OH) with Am(III)/Eu(III) ions was investigated using scalar relativistic density functional theory (DFT). The analyses of bond order, quantum theory of atoms in molecules (QTAIM), and molecular orbital (MO) indicate that the substitution groups have a slight effect on the electronic structures of the [M(L-X)(NO3)3] (X = CF3, Br, OH) complexes. However, the thermodynamic results suggest that a ligand with the electron-donating group (L-OH) improves the extraction ability of metal ions, and the ligand modified by the electron-withdrawing group (L-Br) has the best Am(III)/Eu(III) selectivity. This work could render new insights into understanding the effect of electron-withdrawing and electron-donating groups in tuning the selectivity of Et-Tol-DAPhen derivatives and pave the way for designing new ligands modified by substituted groups with better extraction ability and An(III)/Ln(III) selectivity.
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Affiliation(s)
- Xia-Ping Lei
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China.,Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Qun-Yan Wu
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Cong-Zhi Wang
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Jian-Hui Lan
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Zhi-Fang Chai
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Chang-Ming Nie
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Wei-Qun Shi
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
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2
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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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3
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Ebenezer C, Solomon RV. Uptake of Am(III) Ions and Eu(III) Ions Using Cyclic Substituted N, O‐hybrid 1,10‐Phenanthroline Derived Phosphine Oxide Ligands ‐ A DFT Exploration. ChemistrySelect 2022. [DOI: 10.1002/slct.202200446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Cheriyan Ebenezer
- Department of Chemistry Madras Christian College (Autonomous) University of Madras, East Tambaram Chennai 600 059 Tamil Nadu India
| | - Rajadurai Vijay Solomon
- Department of Chemistry Madras Christian College (Autonomous) University of Madras, East Tambaram Chennai 600 059 Tamil Nadu India
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4
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Abigail Jennifer G, Ebenezer C, Vijay Solomon R. Selective Complexation of trivalent Americium over Europium with substituted Triazolebipyridine-based Ligand in High Level-Liquid Waste- A DFT investigation. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115832] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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5
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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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6
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Does the length of the alkyl chain affect the complexation and selectivity of phenanthroline-derived phosphonate ligands? – Answers from DFT calculations. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115533] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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George Thomas M, Ebenezer C, Solomon RV. Tuning the structure of disulfonated phenanthroline based ligands for effective separation of Am(III)/Eu(III) ions : A DFT investigation. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117151] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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8
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Stewart KME, Al‐Ghamdi M, Khater M, Abdel‐Rahman EM, Penlidis A. An overview of sensors and sensing materials for heavy metals in aqueous environments. CAN J CHEM ENG 2021. [DOI: 10.1002/cjce.24139] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
| | - Majed Al‐Ghamdi
- National Center for Electronics and Photonics Technology, King Abdulaziz City for Science and Technology (KACST) Riyadh Saudi Arabia
| | - Mahmoud Khater
- Department of Mechanical Engineering KFUPM Dhahran Saudi Arabia
| | - Eihab M. Abdel‐Rahman
- Department of Systems Design Engineering University of Waterloo Waterloo Ontario Canada
| | - Alexander Penlidis
- Department of Chemical Engineering, Institute for Polymer Research University of Waterloo Waterloo Ontario Canada
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9
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Ebenezer C, Vijay Solomon R. Tailoring the selectivity of phenanthroline derivatives for the partitioning of trivalent Am/Eu ions – a relativistic DFT study. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00097g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Preferential binding of actinides over lanthanides using tailored phenanthroline derivative ligands through relativistic DFT calculations.
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Affiliation(s)
- Cheriyan Ebenezer
- Department of Chemistry
- Madras Christian College (Autonomous)
- (Affiliated to the University of Madras)
- Chennai – 600 059
- India
| | - Rajadurai Vijay Solomon
- Department of Chemistry
- Madras Christian College (Autonomous)
- (Affiliated to the University of Madras)
- Chennai – 600 059
- India
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10
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Ebenezer C, Solomon RV. Insights into the Extraction of Actinides from Lanthanides Using 3,3’‐Dimethoxy‐phenyl‐bis‐1,2,4‐triazinyl‐2,6‐pyridine Ligand – A DFT Study. ChemistrySelect 2020. [DOI: 10.1002/slct.202003240] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Cheriyan Ebenezer
- Department of Chemistry Madras Christian College (Autonomous) Affiliated to the University of Madras) Chennai 600 059 India
| | - Rajadurai Vijay Solomon
- Department of Chemistry Madras Christian College (Autonomous) Affiliated to the University of Madras) Chennai 600 059 India
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11
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Sasaki Y, Morita K, Matsumiya M, Nakase M. Simultaneous separation of Am and Cm from Nd and Sm by multi-step extraction using the TODGA-DTPA-BA-HNO 3 system. RADIOCHIM ACTA 2020. [DOI: 10.1515/ract-2019-3215] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Abstract
The simultaneous separation of Am and Cm from lanthanides is important for atomic energy fields. However, the process is difficult owing to the chemical behavior of trivalent metal ions with similar ionic radii. All lanthanides, Am, and Cm can be extracted by diglycolamide (DGA). In addition, relatively high separation factors between An and Ln were obtained by the extraction system of TODGA, DTPA (diethylenetriamine-N,N,N′,N″,N″-pentaacetic acid) and HNO3. In this work, DTPA-BA (diethylenetriamine-N,N′,N″-triacetic-N,N″-bisamide), which is an improved version of DTPA, was employed for the separation of Ln and An. After performing a basic study on DTPA-BA, a relatively high separation factor (approximately 8) for actinides/lanthanides was obtained. Then, the multi-step extraction was performed. Thus, the recoveries of 94.7 % for Nd and 4.7 % for Am and Cm in organic phase, and 5.3 % Nd and 95.3 % for Am and Cm in aqueous phase were obtained.
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Affiliation(s)
- Yuji Sasaki
- Japan Atomic Energy Agency , Tokai, Ibaraki 319-1195 , Japan
| | - Keisuke Morita
- Japan Atomic Energy Agency , Tokai, Ibaraki 319-1195 , Japan
| | - Masahiko Matsumiya
- Yokohama National University , 79-1 Tokiwadai , Yokohama 240-8501 , Japan
| | - Masahiko Nakase
- Tokyo Institute and Technology , 2-12-1 Ookayama, Meguro-ku , Tokyo 152-8550 , Japan
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12
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Chen YM, Wang CZ, Wu QY, Lan JH, Chai ZF, Nie CM, Shi WQ. Theoretical Insights into Modification of Nitrogen-Donor Ligands to Improve Performance on Am(III)/Eu(III) Separation. Inorg Chem 2020; 59:3221-3231. [PMID: 32048832 DOI: 10.1021/acs.inorgchem.9b03604] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nitrogen-donor ligands have been considered to be promising agents for separating trivalent actinides (An(III)) from lanthanides (Ln(III)). Thereinto, how to decorate these ligands for better extraction performance is urgent to design "perfect" separating extractants. In this work, we systematically explored a series of heterocyclic N-donor ligands (L1 = dipyridazino[4,3-c:3',4'-h]acridine, L2 = dipyridazino[3,4-a:4',3'-j]phenazine, L3 = 2,6-di(cinnolin-3-yl)pyridine)), as well as their substituted derivatives, and compared their extraction and complexation ability toward An(III) and Ln(III) ions by using quasi-relativistic density functional theory (DFT). We found that the pyridazine N atoms probably play a notable role in electron donation to metal cations by molecular orbital (MO) and bond order analyses. Besides, the calculated results clearly verified that these N-donor ligands possess higher coordination affinity toward Am(III) over Eu(III). The rigid ligands (L1 and L2) exhibit higher selective abilities for the Am(III)/Eu(III) separation compared with that of the flexible ligand (L3). For each ligand, the 1:2 (metal/ligand) extraction reaction is predicted to be most probable in the separation process. The introduction of an alkyl group on the lateral chain or an electron-donating group on the main chain gives rise to a better extraction performance of the ligands, and the CyMe4 or MeO substituted ligands show higher extraction and separation ability. Simultaneous introduction of CyMe4 and MeO groups can enhance the extraction ability of the ligand to metal ions, but the separating ability depends on the differences of the extraction capacity of An(III) and Ln(III). This work can help to gain a more in-depth understanding the selectivity differences of similar N-donor ligands and provide more theoretical insights into the design of novel extractants for An(III)/Ln(III) separation.
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Affiliation(s)
- Yan-Mei Chen
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Cong-Zhi Wang
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Qun-Yan Wu
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Jian-Hui Lan
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Zhi-Fang Chai
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, China
| | - Chang-Ming Nie
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Wei-Qun Shi
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
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13
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Liu Z, Ren X, Tan R, Chai Z, Wang D. Key Factors Determining Efficiency of Liquid-Liquid Extraction: Implications from Molecular Dynamics Simulations of Biphasic Behaviors of CyMe 4-BTPhen and Its Am(III) Complexes. J Phys Chem B 2020; 124:1751-1766. [PMID: 32039594 DOI: 10.1021/acs.jpcb.9b08447] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
CyMe4-BTPhen (2,9-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-1,2,4-benzotriazin-3-yl)-1,10-phenanthroline, denoted as L) has been considered as a promising extractant in lanthanide(III)/actinide(III) separation. Vast endeavors in its application put forward a compelling need on the understanding of the underlying mechanism in the liquid-liquid extraction. To address the issue of its dynamics in biphasic systems, we carried out molecular dynamics (MD) simulations of L and its complexes with a heavy f-block metal ion, americium(III) (Am3+) in "oil"/water binary solvents. Two types of organic phases have been considered, differing in the presence of octanol in the bulk n-dodecane or not, and the distribution of the solutes and their interfacial behaviors have been investigated. Two of the key factors that determine the efficiency of a liquid-liquid extraction protocol were delineated and discussed, that is, the appropriate ligand to enhance the lipophilicity of AmL complexes and appropriate way to form ion pairs to minimize the attraction between the complexes and aqueous phase. The simulations showed that the charge states of both ligand and AmL complexes were strongly correlated with their phase behavior, and the migration of neutral species was driven by van der Waals interactions while that of charged species by electrostatic interactions, indicating stronger lipophilicity of the former than the latter. The presence of octanol facilitated the migration of the ligand from the interface to the organic phase via hydrogen bond between its polar head and the ligand or the AmL complexes and constituted a polar core in the organic phase. This work bridged the widely used liquid-liquid extraction technique in chemistry to a fundamental chemical concept, that is, minimization of hydrophilicity and maximization of lipophilicity to facilitate phase transfer from the aqueous phase to the organic phase, and is expected to improve the understanding of dynamics of ligands and their complexes with metal ions and to contribute to the development of efficient protocols for phase transfer of target species.
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Affiliation(s)
- Ziyi Liu
- CAS Key Laboratory of Nuclear Radiation and Nuclear Techniques, Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xu Ren
- CAS Key Laboratory of Nuclear Radiation and Nuclear Techniques, Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rongri Tan
- CAS Key Laboratory of Nuclear Radiation and Nuclear Techniques, Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,College of Communication and Electronics, Jiangxi Science & Technology Normal University, Nanchang 330013, China
| | - Zhifang Chai
- CAS Key Laboratory of Nuclear Radiation and Nuclear Techniques, Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,University of Chinese Academy of Sciences, Beijing 100049, China.,State Key Laboratory of Radiation Medicine and Protection, and School of Radiation Medicine and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou 215123, China
| | - Dongqi Wang
- CAS Key Laboratory of Nuclear Radiation and Nuclear Techniques, Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,University of Chinese Academy of Sciences, Beijing 100049, China
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14
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Jing Y, Chen J, Su W, Chen L, Liu Y, Li D. Deep insights into the solution and interface behaviors in heavy rare earth extraction: A molecular dynamics study. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111790] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Weßling P, Trumm M, Macerata E, Ossola A, Mossini E, Gullo MC, Arduini A, Casnati A, Mariani M, Adam C, Geist A, Panak PJ. Activation of the Aromatic Core of 3,3'-(Pyridine-2,6-diylbis(1 H-1,2,3-triazole-4,1-diyl))bis(propan-1-ol)-Effects on Extraction Performance, Stability Constants, and Basicity. Inorg Chem 2019; 58:14642-14651. [PMID: 31609595 PMCID: PMC6863594 DOI: 10.1021/acs.inorgchem.9b02325] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The "CHON" compatible water-soluble ligand 3,3'-(pyridine-2,6-diylbis(1H-1,2,3-triazole-4,1-diyl))bis(propan-1-ol) (PTD) has shown promise for selectively stripping actinide ions from an organic phase containing both actinide and lanthanide ions, by preferential complexation of the former. Aiming at improving its complexation properties, PTD-OMe was synthesized, bearing a methoxy group on the central pyridine ring, thus increasing its basicity and hence complexation strength. Unfortunately, solvent extraction experiments in the range of 0.1-1 mol/L nitric acid proved PTD-OMe to be less efficient than PTD. This behavior is explained by its greater pKa value (pKa = 2.54) compared to PTD (pKa = 2.1). This counteracts its improved complexation properties for Cm(III) (log β3(PTD-OMe) = 10.8 ± 0.4 versus log β3(PTD) = 9.9 ± 0.5).
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Affiliation(s)
- Patrik Weßling
- Institute for Nuclear Waste Disposal , Karlsruhe Institute of Technology , P.O. Box 3640, 76021 Karlsruhe , Germany.,Institut für Physikalische Chemie , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 253 , 69120 Heidelberg , Germany
| | - Michael Trumm
- Institute for Nuclear Waste Disposal , Karlsruhe Institute of Technology , P.O. Box 3640, 76021 Karlsruhe , Germany
| | - Elena Macerata
- Politecnico di Milano, Department of Energy , Nuclear Engineering Division , Piazza Leonardo da Vinci 32 , 20133 Milano , Italy
| | - Annalisa Ossola
- Politecnico di Milano, Department of Energy , Nuclear Engineering Division , Piazza Leonardo da Vinci 32 , 20133 Milano , Italy
| | - Eros Mossini
- Politecnico di Milano, Department of Energy , Nuclear Engineering Division , Piazza Leonardo da Vinci 32 , 20133 Milano , Italy
| | - Maria Chiara Gullo
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilitá Ambientale , Universitá di Parma , Area delle Scienze 17/a , 43124 Parma , Italy
| | - Arturo Arduini
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilitá Ambientale , Universitá di Parma , Area delle Scienze 17/a , 43124 Parma , Italy
| | - Alessandro Casnati
- Dipartimento di Scienze Chimiche, della Vita e della Sostenibilitá Ambientale , Universitá di Parma , Area delle Scienze 17/a , 43124 Parma , Italy
| | - Mario Mariani
- Politecnico di Milano, Department of Energy , Nuclear Engineering Division , Piazza Leonardo da Vinci 32 , 20133 Milano , Italy
| | - Christian Adam
- Institute for Nuclear Waste Disposal , Karlsruhe Institute of Technology , P.O. Box 3640, 76021 Karlsruhe , Germany
| | - Andreas Geist
- Institute for Nuclear Waste Disposal , Karlsruhe Institute of Technology , P.O. Box 3640, 76021 Karlsruhe , Germany
| | - Petra J Panak
- Institute for Nuclear Waste Disposal , Karlsruhe Institute of Technology , P.O. Box 3640, 76021 Karlsruhe , Germany.,Institut für Physikalische Chemie , Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 253 , 69120 Heidelberg , Germany
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16
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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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17
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Borisova NE, Safiullina AM, Lizunov AV, Semenov AA, Grigor’ev MS, Reshetova MD, Litvinov IA, Tatarinov DA, Mironov VF. Metal-Promoted Extraction Deprotonation of Bidentate Organophosphoric Reagents: Recovery of Uranium, Thorium, and Lanthanides. RUSS J INORG CHEM+ 2019. [DOI: 10.1134/s0036023619030057] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Comparative Study of Complexes of Rare Earths and Actinides with 2,6-Bis(1,2,4-triazin-3-yl)pyridine. INORGANICS 2019. [DOI: 10.3390/inorganics7030026] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Complexes of group III metals (rare earth and actinides) with 2,6-bis(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine (BTP) have been investigated by computational (DFT) and, in limited cases, by experimental (FT-IR, X-ray) techniques with the goal of determining the characteristics of metal–ligand interactions. The DFT calculations using the M062X exchange-correlation functional revealed that metal–ligand distances correlate with the ionic radii of the metals, in agreement with available X-ray diffraction results on the Sc, Y, La, U, and Pu complexes. A related blue-shift trend could be observed in seven characteristic bands in the IR spectra associated with metal–ligand vibrations. The computations uncovered considerable charge transfer interactions, particularly in the actinide complexes, as important covalent contributions to the metal–ligand bonding. The covalent character of the metal–ligand bonds decreases in the actinides, from U to Cm.
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19
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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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20
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Wang Y, Ao Y, Yuan W, Peng J, Zhao L, Zhai M. Extraction performance of Eu3+ by using heterocyclic N-donor ligands with different structures in ionic liquids: an experimental and theoretical study. NEW J CHEM 2018. [DOI: 10.1039/c8nj00517f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Extraction performance of Eu3+ has been studied for heterocyclic N-donor ligands with different structures in [C2mim][NTf2] as a diluent.
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Affiliation(s)
- Yue Wang
- Beijing National Laboratory for Molecular Sciences
- Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science
- the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
| | - Yinyong Ao
- Institute of Nuclear Physics and Chemistry
- China Academy of Engineering Physics
- Mianyang 621900
- P. R. China
| | - Weijin Yuan
- Institute of Applied Electromagnetic Engineering
- Huazhong University of Science and Technology
- Wuhan 430074
- P. R. China
| | - Jing Peng
- Beijing National Laboratory for Molecular Sciences
- Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science
- the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
| | - Long Zhao
- Institute of Applied Electromagnetic Engineering
- Huazhong University of Science and Technology
- Wuhan 430074
- P. R. China
| | - Maolin Zhai
- Beijing National Laboratory for Molecular Sciences
- Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science
- the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
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21
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Ali SM. Enhanced free energy of extraction of Eu 3+ and Am 3+ ions towards diglycolamide appended calix[4]arene: insights from DFT-D3 and COSMO-RS solvation models. Dalton Trans 2017; 46:10886-10898. [PMID: 28766636 DOI: 10.1039/c7dt01949a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Density functional theory in conjunction with COSMO and COSMO-RS solvation models employing dispersion correction (DFT-D3) has been applied to gain an insight into the complexation of Eu3+/Am3+ with diglycolamide (DGA) and calix[4]arene appended diglycolamide (CAL4DGA) in ionic liquids by studying structures, energetics, thermodynamics and population analysis. The calculated Gibbs free energy for both Eu3+ and Am3+ ions with DGA was found to be smaller than that with CAL4DGA. The entropy of complexation was also found to be reduced to a large extent with DGA compared to complexation with CAL4DGA. The solution phase free energy was found to be negative and was higher for Eu3+ ion. The entropy of complexation was not only found to be further reduced but also became negative in the case of DGA alone. Though the entropy was found to be negative it could not outweigh the high negative enthalpic contribution. The same trend was observed in the solution where the free energy of extraction, ΔG, for Eu3+ ions was shown to be higher than that for Am3+ ions towards free DGA. But the values of ΔG and ΔΔG(= ΔGEu-ΔGAm) were found to be much higher with CAL4DGA (-12.58 kcal mol-1) in the presence of nitrate ions compared to DGA (-1.69 kcal mol-1) due to enhanced electronic interaction and positive entropic contribution. Furthermore, both the COSMO and COSMO-RS models predict very close values of ΔΔΔG (= ΔΔGCAL4DGA - ΔΔGnDGA), indicating that both solvation models could be applied for evaluating the metal ion selectivity. The value of the reaction free energy was found to be higher after dispersion correction. The charge on the Eu and Am atoms for the complexes with DGA and CAL4DGA indicates the charge-dipole type interaction leading to strong binding energy. The present theoretical results support the experimental findings and thus might be of importance in the design of functionalized ligands.
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Affiliation(s)
- Sk Musharaf Ali
- Chemical Engineering Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India.
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22
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Bryantsev VS, Hay BP. Theoretical prediction of Am(iii)/Eu(iii) selectivity to aid the design of actinide-lanthanide separation agents. Dalton Trans 2015; 44:7935-42. [PMID: 25824656 DOI: 10.1039/c4dt03275f] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Selective extraction of minor actinides from lanthanides is a critical step in the reduction of radiotoxicity of spent nuclear fuels. However, the design of suitable ligands for separating chemically similar 4f- and 5f-block trivalent metal ions poses a significant challenge. First-principles calculations should play an important role in the design of new separation agents, but their ability to predict metal ion selectivity has not been systematically evaluated. In this work, we examine the ability of several density functional theory methods to predict selectivity of Am(iii) and Eu(iii) with oxygen, mixed oxygen-nitrogen, and sulfur donor ligands. The results establish a computational method capable of predicting the correct order of selectivities obtained from liquid-liquid extraction and aqueous phase complexation studies. To allow reasonably accurate predictions, it was critical to employ sufficiently flexible basis sets and provide proper account of solvation effects. The approach is utilized to estimate the selectivity of novel amide-functionalized diazine and 1,2,3-triazole ligands.
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Affiliation(s)
- Vyacheslav S Bryantsev
- Oak Ridge National Laboratory, Chemical Sciences Division, 1 Bethel Valley Rd., Oak Ridge, Tennessee, 37831-6119 USA.
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23
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Huang QR, Kingham JR, Kaltsoyannis N. The strength of actinide-element bonds from the quantum theory of atoms-in-molecules. Dalton Trans 2015; 44:2554-66. [PMID: 25307773 DOI: 10.1039/c4dt02323d] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
[AnX(3)](2)(μ-η(2):η(2)-N(2)) (An = Th-Pu; X = F, Cl, Br, Me, H, OPh) have been studied using relativistic density functional theory. Geometric and vibrational data suggest that metal→N(2) charge transfer maximises at the protactinium systems, which feature the longest N-N bonds and the smallest σ(N-N), as a result of partial population of the N-N π* orbitals. There is very strong correlation of the standard quantum theory of atoms-in-molecules (QTAIM) metrics - bond critical point ρ, ∇(2)ρ and H and delocalisation indices - with An-N and N-N bond lengths and σ(N-N), but the correlation with An-N interaction energies is very poor. A similar situation exists for the other systems studied; neutral and cationic actinide monoxide and dioxides, and AnL(3+) and AnL(3)(3+) (L = pyridine (Py), pyrazine (Pz) and triazine (Tz)) with the exception of some of the ∇(2)ρ data, for which moderate to good correlations with energy data are sometimes seen. By contrast, in almost all cases there is very strong correlation of interaction and bond energies with |ΔQ(QTAIM)(An)|, a simple QTAIM metric which measures the amount of charge transferred to or from the actinide on compound formation.
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Affiliation(s)
- Qian-Rui Huang
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK.
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24
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Veliscek-Carolan J, Jolliffe KA, Hanley TL. Effective Am(iii)/Eu(iii) separations using 2,6-bis(1,2,4-triazin-3-yl)pyridine (BTP) functionalised titania particles and hierarchically porous beads. Chem Commun (Camb) 2015; 51:11433-6. [DOI: 10.1039/c5cc03957f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Titania particles and beads functionalised with a modified BTP ligand have been used to selectively extract Am(iii) over Eu(iii) from 0.01 M nitric acid solutions.
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Affiliation(s)
| | | | - T. L. Hanley
- Australian Nuclear Science and Technology Organisation
- NSW
- Australia
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25
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Liang YN, Yang X, Ding S, Li S, Wang F, Chai Z, Wang D. Computational thermodynamic study on the complexes of Am(iii) with tridentate N-donor ligands. NEW J CHEM 2015. [DOI: 10.1039/c5nj01285f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
BTP differs from hemi-BTP and TPY in its conformational preference, which may contribute to its higher efficiency in extracting Am(iii).
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Affiliation(s)
- Yan-Ni Liang
- Shaanxi Collaborative Innovation Center of Chinese Medicinal Resources Industrialization
- Shaanxi University of Chinese Medicine
- Xianyang
- China
- Institute of Atomic and Molecular Physics
| | - Xia Yang
- Multidisciplinary Initiative Center
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing
- China
| | - Songdong Ding
- Institute of Atomic and Molecular Physics
- College of Chemistry
- Sichuan University
- Chengdu
- China
| | - Shoujian Li
- Institute of Atomic and Molecular Physics
- College of Chemistry
- Sichuan University
- Chengdu
- China
| | - Fan Wang
- Institute of Atomic and Molecular Physics
- College of Chemistry
- Sichuan University
- Chengdu
- China
| | - Zhifang Chai
- Multidisciplinary Initiative Center
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing
- China
| | - Dongqi Wang
- Multidisciplinary Initiative Center
- Institute of High Energy Physics
- Chinese Academy of Sciences
- Beijing
- China
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26
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Yang X, Liang Y, Ding S, Li S, Chai Z, Wang D. Influence of a Bridging Group and the Substitution Effect of Bis(1,2,4-triazine) N-Donor Extractants on Their Interactions with a NpV Cation. Inorg Chem 2014; 53:7848-60. [DOI: 10.1021/ic500138w] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Xia Yang
- CAS Key Laboratory of Nuclear Radiation and Nuclear Energy
Techniques, and Multidisciplinary Initiative Center, Institute of
High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Yanni Liang
- CAS Key Laboratory of Nuclear Radiation and Nuclear Energy
Techniques, and Multidisciplinary Initiative Center, Institute of
High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- College of Chemistry, Sichuan University, Chengdu, China
| | - Songdong Ding
- College of Chemistry, Sichuan University, Chengdu, China
| | - Shoujian Li
- College of Chemistry, Sichuan University, Chengdu, China
| | - Zhifang Chai
- CAS Key Laboratory of Nuclear Radiation and Nuclear Energy
Techniques, and Multidisciplinary Initiative Center, Institute of
High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- School of Radiation Medicine
and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou 215123, China
| | - Dongqi Wang
- CAS Key Laboratory of Nuclear Radiation and Nuclear Energy
Techniques, and Multidisciplinary Initiative Center, Institute of
High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
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27
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SHIMOJO K, AOYAGI N, SAITO T, OKAMURA H, KUBOTA F, GOTO M, NAGANAWA H. Highly Efficient Extraction Separation of Lanthanides Using a Diglycolamic Acid Extractant. ANAL SCI 2014; 30:263-9. [DOI: 10.2116/analsci.30.263] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Kojiro SHIMOJO
- Division of Chemistry for Nuclear Engineering, Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency (JAEA)
| | - Noboru AOYAGI
- Division of Chemistry for Nuclear Engineering, Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency (JAEA)
| | - Takumi SAITO
- Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo
| | - Hiroyuki OKAMURA
- Division of Chemistry for Nuclear Engineering, Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency (JAEA)
| | - Fukiko KUBOTA
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University
| | - Masahiro GOTO
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University
- Center for Future Chemistry, Kyushu University
| | - Hirochika NAGANAWA
- Division of Chemistry for Nuclear Engineering, Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency (JAEA)
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28
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Lewis FW, Harwood LM, Hudson MJ, Drew MGB, Hubscher-Bruder V, Videva V, Arnaud-Neu F, Stamberg K, Vyas S. BTBPs versus BTPhens: Some Reasons for Their Differences in Properties Concerning the Partitioning of Minor Actinides and the Advantages of BTPhens. Inorg Chem 2013; 52:4993-5005. [DOI: 10.1021/ic3026842] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Frank W. Lewis
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom
| | - Laurence M. Harwood
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom
| | - Michael J. Hudson
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom
| | - Michael G. B. Drew
- Department of Chemistry, University of Reading, Whiteknights, Reading RG6 6AD, United Kingdom
| | - Véronique Hubscher-Bruder
- Université de Strasbourg, IPHC, 25 rue Becquerel 67087 Strasbourg, France CNRS, UMR7178,
67037 Strasbourg, France
| | - Vladimira Videva
- Université de Strasbourg, IPHC, 25 rue Becquerel 67087 Strasbourg, France CNRS, UMR7178,
67037 Strasbourg, France
| | - Françoise Arnaud-Neu
- Université de Strasbourg, IPHC, 25 rue Becquerel 67087 Strasbourg, France CNRS, UMR7178,
67037 Strasbourg, France
| | - Karel Stamberg
- Department of Nuclear Chemistry, Czech Technical University in Prague, Břehová 7, 11519 Prague 1,
Czech Republic
| | - Shyam Vyas
- National Nuclear Laboratory, Chadwick House, Warrington
Road, Warrington WA3 6AE, United Kingdom
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29
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Panak PJ, Geist A. Complexation and Extraction of Trivalent Actinides and Lanthanides by Triazinylpyridine N-Donor Ligands. Chem Rev 2013; 113:1199-236. [DOI: 10.1021/cr3003399] [Citation(s) in RCA: 364] [Impact Index Per Article: 33.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Petra J. Panak
- Karlsruhe Institute of Technology,
Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe,
Germany
- Ruprecht-Karls-Universität
Heidelberg, Physikalisch Chemisches Institut (PCI), Im Neuenheimer
Feld 253, 69120 Heidelberg, Germany
| | - Andreas Geist
- Karlsruhe Institute of Technology,
Institute for Nuclear Waste Disposal (INE), P.O. Box 3640, 76021 Karlsruhe,
Germany
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30
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Benay G, Wipff G. Oil-Soluble and Water-Soluble BTPhens and Their Europium Complexes in Octanol/Water Solutions: Interface Crossing Studied by MD and PMF Simulations. J Phys Chem B 2013; 117:1110-22. [DOI: 10.1021/jp3103707] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- G. Benay
- Laboratoire MSM, UMR CNRS 7177, Institut de Chimie,
1, rue B. Pascal, 67 000 Strasbourg, France
| | - G. Wipff
- Laboratoire MSM, UMR CNRS 7177, Institut de Chimie,
1, rue B. Pascal, 67 000 Strasbourg, France
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31
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Mountain ARE, Kaltsoyannis N. Do QTAIM metrics correlate with the strength of heavy element–ligand bonds? Dalton Trans 2013; 42:13477-86. [DOI: 10.1039/c3dt51337h] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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32
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Lewis FW, Harwood LM, Hudson MJ, Drew MGB, Sypula M, Modolo G, Whittaker D, Sharrad CA, Videva V, Hubscher-Bruder V, Arnaud-Neu F. Complexation of lanthanides, actinides and transition metal cations with a 6-(1,2,4-triazin-3-yl)-2,2':6',2''-terpyridine ligand: implications for actinide(III)/lanthanide(III) partitioning. Dalton Trans 2012; 41:9209-19. [PMID: 22729349 DOI: 10.1039/c2dt30522d] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The quadridentate N-heterocyclic ligand 6-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-1,2,4-benzotriazin-3-yl)-2,2' : 6',2''-terpyridine (CyMe(4)-hemi-BTBP) has been synthesized and its interactions with Am(III), U(VI), Ln(III) and some transition metal cations have been evaluated by X-ray crystallographic analysis, Am(III)/Eu(III) solvent extraction experiments, UV absorption spectrophotometry, NMR studies and ESI-MS. Structures of 1:1 complexes with Eu(III), Ce(III) and the linear uranyl (UO(2)(2+)) ion were obtained by X-ray crystallographic analysis, and they showed similar coordination behavior to related BTBP complexes. In methanol, the stability constants of the Ln(III) complexes are slightly lower than those of the analogous quadridentate bis-triazine BTBP ligands, while the stability constant for the Yb(III) complex is higher. (1)H NMR titrations and ESI-MS with lanthanide nitrates showed that the ligand forms only 1:1 complexes with Eu(III), Ce(III) and Yb(III), while both 1:1 and 1:2 complexes were formed with La(III) and Y(III) in acetonitrile. A mixture of isomeric chiral 2:2 helical complexes was formed with Cu(I), with a slight preference (1.4:1) for a single directional isomer. In contrast, a 1:1 complex was observed with the larger Ag(I) ion. The ligand was unable to extract Am(III) or Eu(III) from nitric acid solutions into 1-octanol, except in the presence of a synergist at low acidity. The results show that the presence of two outer 1,2,4-triazine rings is required for the efficient extraction and separation of An(III) from Ln(III) by quadridentate N-donor ligands.
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Affiliation(s)
- Frank W Lewis
- Department of Chemistry, The University of Reading, Whiteknights, Reading RG6 6AD, UK.
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33
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D'Angelo P, Spezia R. Hydration of Lanthanoids(III) and Actinoids(III): An Experimental/Theoretical Saga. Chemistry 2012; 18:11162-78. [DOI: 10.1002/chem.201200572] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Indexed: 11/06/2022]
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34
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Lan JH, Shi WQ, Yuan LY, Li J, Zhao YL, Chai ZF. Recent advances in computational modeling and simulations on the An(III)/Ln(III) separation process. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.04.002] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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35
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Kaltsoyannis N. Does covalency increase or decrease across the actinide series? Implications for minor actinide partitioning. Inorg Chem 2012; 52:3407-13. [PMID: 22668004 DOI: 10.1021/ic3006025] [Citation(s) in RCA: 274] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A covalent chemical bond carries the connotation of overlap of atomic orbitals between bonded atoms, leading to a buildup of the electron density in the internuclear region. Stabilization of the valence 5f orbitals as the actinide series is crossed leads, in compounds of the minor actinides americium and curium, to their becoming approximately degenerate with the highest occupied ligand levels and hence to the unusual situation in which the resultant valence molecular orbitals have significant contributions from both actinide and the ligand yet in which there is little atomic orbital overlap. In such cases, the traditional quantum-chemical tools for assessing the covalency, e.g., population analysis and spin densities, predict significant metal-ligand covalency, although whether this orbital mixing is really covalency in the generally accepted chemical view is an interesting question. This review discusses our recent analyses of the bonding in AnCp3 and AnCp4 (An = Th-Cm; Cp = η(5)-C5H5) using both the traditional tools and also topological analysis of the electron density via the quantum theory of atoms-in-molecules. I will show that the two approaches yield rather different conclusions and suggest that care must be taken when using quantum chemistry to assess metal-ligand covalency in this part of the periodic table. The implications of this work for minor actinide partitioning from nuclear wastes are discussed; minor actinide extractant ligands based on nitrogen donors have received much attention in recent years, as have comparisons of the extent of covalency in actinide-nitrogen bonding with that in analogous lanthanide systems via quantum-chemical studies employing the traditional tools for assessing the covalency.
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Affiliation(s)
- Nikolas Kaltsoyannis
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK
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36
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Benay G, Schurhammer R, Wipff G. Basicity, complexation ability and interfacial behavior of BTBPs: a simulation study. Phys Chem Chem Phys 2011; 13:2922-34. [DOI: 10.1039/c0cp01975e] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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