1
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Jennifer G A, Schreckenbach G, Varathan E. Computational study of core modified dipyriamethyrin for the competitive complexation of Am 3+/Cm 3+ from their trichlorides. Dalton Trans 2024; 53:7899-7911. [PMID: 38635067 DOI: 10.1039/d4dt00395k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
In the process of handling and storage of radioactive actinides it is essential to selectively sequester the minor actinides, such as Am and Cm, through a competitive complexation process. Herein we computationally designed two core modified ligands (L21- and L3) through systematic oxygen substitution at the NH sites of dipyriamethyrin (L1_2H), a hexadentate expanded porphyrin, and studied their competitive complexation towards trivalent actinides (An = Am/Cm) from their trichlorides using density functional theory (DFT). We observed shorter An-N bonds and longer An-O bonds in complexes based on core modified ligands (L21- and L3). The An-Cl bond length increases with increasing axial coordination number (i.e., from L12- to L3) to accommodate the ligands. All the bonds were identified to be electrostatic in nature. L12- exhibits shorter bonds and larger bond orders on complexing with Am than with Cm. On moving from complexes of L21- to L3, the An-N bond lengths are shortened, while An-O bond lengths become larger. Between the complexes of Am and Cm, there is marginal difference in their bond distances with L21- and L3. Charge analysis shows ligand to metal charge transfer during coordination, with back-donation from An to N/O and Cl. The calculated spin-density analysis indicates that An remains in its trivalent oxidation state on complexation, while orbital occupation analysis shows that the 5f and 6d orbitals are involved in bonding; this was confirmed by molecular orbital (MO) analysis that shows the complexes of L21- and L3 to exhibit higher degeneracy in their overlapping MOs. Further, the energy decomposition analysis (EDA) confirms that all ionic bonds are primarily due to electrostatic contributions, where the orbital contributions increase from L12- to L3 complexes and maximum covalency was observed in Cm complexes due to the energy matching between the 5f orbitals of Cm and the 2p orbitals of N and Cl, compared to Am. To confirm the competitiveness in the complexation of the ligand towards Am vs. Cm, the thermodynamic parameters were analysed for the ligand and metal substitution reactions. L12- shows more affinity towards Am than Cm, while L21- and L3 prefer Cm.
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Affiliation(s)
- Abigail Jennifer G
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, Tamil Nadu, India.
| | - Georg Schreckenbach
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada
| | - Elumalai Varathan
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, Tamil Nadu, India.
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2
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Verma PK, Mahanty B, Bhattacharyya A, Matveev PI, Borisova NE, Kalmykov SN, Mohapatra PK. Pyridine Diphosphonate Ligand for Stabilization of Tetravalent Uranium and Neptunium in Aqueous Medium under Aerobic Conditions. Inorg Chem 2024; 63:3348-3358. [PMID: 38320960 DOI: 10.1021/acs.inorgchem.3c03840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
Though uranium is usually present in its +6 oxidation state (as uranyl ion) in aqueous solutions, its conversion to oxidation states such as +4 or +5 is a challenging task. Electrochemical reduction and axial oxo activation are the preferred methods to get stable unusual oxidation states of uranium in an aqueous medium. In previous studies, dicarboxylic acid has been used to stabilize UO2+ in aqueous alkaline solutions. In the present work, a diphosphonate ligand was chosen due to its higher complexing ability compared to that of the carboxylate ligands. Neptunium complexation studies with 2,6-pyridinediphosphonic acid (PyPOH) indicated the formation of different species at different pH values and the complexation facilitates disproportionation of NpO2+ to Np4+ and NpO22+ at pH 2. Hexavalent actinides form insoluble complexes in aqueous media at pH = 2, as confirmed by UO22+ complexation studies. The in situ complexation-driven precipitation resulted in conversion to pure Np4+ in aqueous media as the Np4+-PyPOH complex. A strong complexing ability of the PyPOH ligand toward the Np4+ ion is also seen for the stabilization of the electrochemically generated U4+ in aqueous medium under aerobic conditions. The U4+-PyPOH complex was found to be stable for 3 months. Raman, UV-vis, fluorescence, and cyclic voltametric studies along with density functional theory (DFT) calculations were done to get structural insights into the PyPOH complexes of actinides in different oxidation states.
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Affiliation(s)
- Parveen Kumar Verma
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Bholanath Mahanty
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Arunasis Bhattacharyya
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Petr I Matveev
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Nataliya E Borisova
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Stepan N Kalmykov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Prasanta Kumar Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
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3
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Jennifer G A, Gao Y, Schreckenbach G, Varathan E. Periodic Trends in the Stabilization of Actinyls in Their Higher Oxidation States Using Pyrrophen Ligands. Inorg Chem 2023; 62:6920-6933. [PMID: 37104857 DOI: 10.1021/acs.inorgchem.3c00022] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
Owing to the prominent existence and unique chemistry of actinyls, their complexation with suitable ligands is of significant interest. The complexation of high-valent actinyl moieties (An = U, Np, Pu and Am) with the acyclic sal-porphyrin analogue called "pyrrophen" (L(1)) and its dimethyl derivative (L(2)) with four nitrogen and two oxygen donor atoms was studied using relativistic density functional theory. Based on the periodic trends, the [UVO2-L(1)/L(2)]1- complexes show shorter bond lengths and higher bond orders that increase across the series of pentavalent actinyl complexes mainly due to the localization of the 5f orbitals. Among the hexavalent complexes, the [UVIO2-L(1)/L(2)] complexes have the shortest bonds. Following the uranyl complex, due to the plutonium turn, the [AmVIO2-L(1)/L(2)] complexes exhibit comparable properties with those of the former. Charge analysis suggests the complexation to be facilitated through ligand-to-metal charge transfer (LMCT) mainly through σ donation. Thermodynamic feasibility of complexation was modeled using hydrated actinyl moieties in aqueous medium and was found to be spontaneous. The dimethylated pyrrophen (L(2)) shows higher magnitudes of thermodynamic parameters indicating increased feasibility compared to the unsubstituted ligand (L(1)). Energy decomposition analysis (EDA) along with extended transition-state-natural orbitals for chemical valence theory (ETS-NOCV) analysis shows that the dominant electrostatic contributions decrease across the series and are counteracted by Pauli repulsion. Slight but considerable covalency is provided to hexavalent actinyl complexes by orbital contributions; this was confirmed by molecular orbital (MO) analysis that suggests strong covalency in americyl (VI) complexes. In addition to the pentavalent and hexavalent actinyl moieties, heptavalent actinyl species of neptunyl, plutonyl, and americyl were studied. Beyond the influence of the charges, the geometric and electronic properties point to the stabilization of neptunyl (VII) in the pyrrophen ligand environment, while the others shift to a lower (+VI) and relatively stable OS on complexation.
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Affiliation(s)
- Abigail Jennifer G
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Tamil Nadu, India
| | - Yang Gao
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
- NHC Key Laboratory of Nuclear Technology Medical Transformation (Mianyang Central Hospital), Mianyang 621010, China
| | - Georg Schreckenbach
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Elumalai Varathan
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Tamil Nadu, India
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4
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Yamagata K, Ouchi K, Marumo K, Tasaki-Handa Y, Haraga T, Saito S. Unusually Kinetically Inert Monocationic Neptunyl Complex with a Fluorescein-Modified 1,10-Phenanthroline-2,9-dicarboxylate Ligand: Specific Separation and Detection in Gel Electrophoresis. Inorg Chem 2023; 62:730-738. [PMID: 36602910 DOI: 10.1021/acs.inorgchem.2c02908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We found a singly charged Np(V)O2+ complex with unprecedented kinetic inertness in aqueous solution, one million times slower than the widely accepted fast kinetics of neptunyl complexes. An inert NpO2+ complex with a fluorescent 1,10-phenanthroline-2,9-dicarboxylate derivative was found by kinetic selection using polyacrylamide gel electrophoresis (PAGE) from a small chemical library. Autoreduction from Np(VI)O22+ to Np(V)O2+ via complexation was observed. A remarkably small spontaneous dissociation rate constant of 8 × 10-6 s-1 (half-life of 23 h) was determined using PAGE. Selective detection of Np(V)O2+ was achieved in PAGE with a detection limit of 68 pmol dm-3 (17 fg). This system was successfully applied to simulated radioactive waste samples. Our finding that electron-rich NpO2+ forms a uniquely inert complex with no strong electrostatic interaction reveals a new aspect of actinide chemistry for developing a novel separation system of real radioactive material samples.
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Affiliation(s)
- Kazuhito Yamagata
- Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama338-8570, Japan
| | - Kazuki Ouchi
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki319-1184, Japan
| | - Kazuki Marumo
- Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama338-8570, Japan
| | - Yuiko Tasaki-Handa
- Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama338-8570, Japan
| | - Tomoko Haraga
- Department of Decommissioning and Waste Management, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki319-1195, Japan
| | - Shingo Saito
- Graduate School of Science and Engineering, Saitama University, Shimo-okubo 255, Sakura-ku, Saitama338-8570, Japan
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5
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Poulin-Ponnelle C, Duvail M, Dumas T, Berthon C. Contribution of Molecular Dynamics in pNMR for the Structural Determination of An V and An VI Complexes in Solution. Inorg Chem 2022; 61:15895-15909. [PMID: 36166623 DOI: 10.1021/acs.inorgchem.2c02040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this study, we propose to use classical molecular dynamics (MD) coupled with 1H NMR spectroscopy to study the conformations of different actinyl AnVI (An = U, Np, and Pu) and AnV (An = Np) complexes with tetra-ethyl dyglicolamide (TEDGA) ligands in order to have a better representation of such complexes in solution. Molecular dynamics simulations showed its effectiveness in interpreting the experiments by the calculation of geometric factors needed for the determination of magnetic properties of these complexes. We demonstrated that different conformations of the AnV and AnVI complexes with TEDGA exist in solution with different coordination modes, which is experimentally confirmed by 1H NMR and EXAFS spectroscopies. Furthermore, MD simulations provide additional insights into the structures of complexes in solution since conformations with fast exchanges, which are not accessible from NMR experiments, have been observed by MD simulations.
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Affiliation(s)
| | - Magali Duvail
- ICSM, Univ. Montpellier, CEA, CNRS, ENSCM, Bagnols sur Cèze 30207, France
| | - Thomas Dumas
- LILA, Univ. Montpellier, CEA, Bagnols sur Cèze 30207, France
| | - Claude Berthon
- LILA, Univ. Montpellier, CEA, Bagnols sur Cèze 30207, France
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6
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Jennifer G A, Gao Y, Schreckenbach G, Varathan E. Chemical bonding in actinyl(V/VI) dipyriamethyrin complexes for the actinide series from americium to californium: a computational investigation. Dalton Trans 2022; 51:10006-10019. [PMID: 35703365 DOI: 10.1039/d2dt01142e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The separation of minor actinides in their dioxocation (i.e., actinyl) form in high-valence oxidation states requires efficient ligands for their complexation. In this work, we evaluate the complexation properties of actinyls including americyl, curyl, berkelyl, and californyl in their pentavalent and hexavalent oxidation states with the dipyriamethyrin ligand (L) using density functional theory calculations. The calculated bond parameters show shorter AnOyl bonds with covalent character and longer An-N bonds with ionic character. The bonding between the actinyl cation and the ligand anion shows a flow of charges from the ligand to actinyl in all [AnV/VIO2-L]1-/0 complexes. However, across the series, backdonation of charges from the metal to the ligand becomes prominent and stabilizes the complexes. The thermodynamic parameters in the gas phase and solution suggest that the complex formation reaction is spontaneous for [CfV/VIO2-L]1-/0 complexes and spontaneous at elevated temperatures (>298.15 K) for all other complexes. Spin-orbit corrections have a quantitative impact while the overall trend remains the same. Energy decomposition analysis (EDA) reveals that the interaction between actinyl and the ligand is mainly due to electrostatic contributions that decrease from Am to Cf along with an increase in orbital contributions due to the backdonation of charges from the actinyl metal center to the ligand that greatly stabilizes the Cf complex. The repulsive Pauli energy contribution is observed to increase in the case of [AnVO2-L]1- complexes from Am to Cf while a decrease is observed among [AnVIO2-L]0 complexes, showing minimum repulsion in [CfVIO2-L]0 complex formation. Overall, the hexavalent actinyl complexes show greater stability (increasing from Am to Cf) than their pentavalent counterparts.
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Affiliation(s)
- Abigail Jennifer G
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, Tamil Nadu, India.
| | - Yang Gao
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada. .,Institut National de La Recherche Scientifique (INRS)-Centre Énergie Matériaux Télécommunications, Varennes, QC, J3X 1P7, Canada.,Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, China
| | - Georg Schreckenbach
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada.
| | - Elumalai Varathan
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, Tamil Nadu, India.
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7
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Li XB, Wu QY, Wang CZ, Lan JH, Zhang M, Chai ZF, Shi WQ. Theoretical Insights into the Reduction Mechanism of Np(VI) with Phenylhydrazine. J Phys Chem A 2021; 125:6180-6188. [PMID: 34235933 DOI: 10.1021/acs.jpca.1c04198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Effectively adjusting and controlling the valence state of neptunium from the spent fuel reprocessing process is essential to separating neptunium. Hydrazine and its derivatives as free-salt reductants have been experimentally demonstrated to effectively reduce Np(VI) to Np(V). We have theoretically investigated the reduction mechanisms of Np(VI) with hydrazine and three derivatives (HOC2H4N2H3, CH3N2H3, and CHON2H3) in previous works. Herein, we further explored the reduction reaction of Np(VI) with phenylhydrazine (C6H5N2H3) including the free radical ion mechanism and the free radical mechanism. Potential energy profiles (PEPs) indicate that the rate-determining step of both mechanisms is the first stage. Moreover, for the free radical ion mechanism, phenylhydrazine possesses better reduction ability to Np(VI) compared to HOC2H4N2H3, CH3N2H3, and CHON2H3, which falls completely in line with the experimental results. Additionally, the analyses of the quantum theory of atoms in molecules (QTAIM), natural bond orbitals (NBOs), electron localization function (ELF), and localized molecular orbitals (LMOs) have been put forward to elucidate the bonding evolution for the structures of the reaction pathways. This work offers insights into the reduction mechanism of Np(VI) with phenylhydrazine from the theory point of view and contributes to design more high-efficiency reductants for the separation of U/Np and Np/Pu in spent fuel reprocessing.
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Affiliation(s)
- Xiao-Bo Li
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, College of Nuclear Science and Technology, Harbin Engineering University, Harbin, Heilongjiang 150001, 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
| | - Meng Zhang
- Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, College of Nuclear Science and Technology, Harbin Engineering University, Harbin, Heilongjiang 150001, 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
| | - Wei-Qun Shi
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
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8
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Li AL, Zhang NX, Wu QY, Wang CZ, Lan JH, Nie CM, Chai ZF, Shi WQ. Theoretical Insights into the Actinide–Silicon Bonding Nature and Stability of a Series of Actinide Complexes with Different Oxidation States. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00196] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ai-Lin Li
- 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
| | - Nai-Xin Zhang
- 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
| | - Chang-Ming Nie
- School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China
| | - Zhi-Fang Chai
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- Engineering Laboratory of Nuclear 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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9
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Varathan E, Gao Y, Schreckenbach G. Computational Study of Actinyl Ion Complexation with Dipyriamethyrin Macrocyclic Ligands. J Phys Chem A 2021; 125:920-932. [PMID: 33476158 DOI: 10.1021/acs.jpca.0c08760] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Relativistic density functional theory has been employed to characterize [AnO2(L)]0/-1 complexes, where An = U, Np, Pu, and Am, and L is the recently reported hexa-aza porphyrin analogue, termed dipyriamethyrin, which contains six nitrogen donor atoms (four pyrrolic and two pyridine rings). Shorter axial (An═O) and longer equatorial (An-N) bond lengths are observed when going from AnVI to AnV. The actinide to pyrrole nitrogen bonds are shorter as compared to the bonds to the pyridine nitrogens; the former also play a dominant role in the formation of the actinyl (VI and V) complexes. Natural population analysis shows that the pyrrole nitrogen atoms in all the complexes carry higher negative charges than the pyridine nitrogens. Upon binding actinyl ions with the ligand a significant ligand-to-metal charge transfer takes place in all the actinyl (VI and V) complexes. The formation energy of the actinyl(VI,V) complexes in the gas-phase is found to decrease in the order of UO2L > PuO2L > NpO2L > AmO2L. This trend is consistent with results for the formation of complexes in dichloromethane solution. The calculated ΔG and ΔH values are negative for all the complexes. Energy decomposition analysis (EDA) indicates that the interactions between actinyl(V/VI) and ligand are mainly controlled by electrostatic components over covalent orbital interactions, and the covalent character gradually decreases from U to Am for both pentavalent and hexavalent actinyl complexes.
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Affiliation(s)
- Elumalai Varathan
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada
| | - Yang Gao
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada
| | - Georg Schreckenbach
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada
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10
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Sharma S, Dumpalan RMR, Rawat N. Experimental and DFT studies on complexation of uranyl with N-(2-Hydroxyethyl)iminodiacetic acid in aqueous medium. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119653] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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11
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Li XB, Wu QY, Wang CZ, Lan JH, Ning SY, Wei YZ, Chai ZF, Shi WQ. Theoretical Study on the Reduction Mechanism of Np(VI) by Hydrazine Derivatives. J Phys Chem A 2020; 124:3720-3729. [PMID: 32310650 DOI: 10.1021/acs.jpca.0c01504] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The key to effective separation of neptunium from the spent fuel reprocessing process is to adjust and control its valence state. Hydrazine and its derivatives have been experimentally confirmed to be effective salt-free reductants for reducing Np(VI) to Np(V). We theoretically studied the reduction reactions of Np(VI) with three hydrazine derivatives (2-hydroxyethyl hydrazine (HOC2H4N2H3), methyl hydrazine (CH3N2H3), and formyl hydrazide (CHON2H3)) and obtained the free radical ion mechanism and the free radical mechanism. Their potential energy profiles (PEPs) suggest that the free radical mechanism is the most probable reaction. Based on the energy barrier of the free radical ion mechanism, the trend of the reduction ability of the three hydrazine derivatives is HOC2H4N2H3 > CH3N2H3 > CHON2H3, which is in excellent agreement with the experimental results. Lastly, the analyses of natural bond orbitals (NBOs), quantum theory of atoms-in-molecules (QTAIM), and electron localization function (ELF) have been carried out to explore the bonding evolution of the structures along the reaction pathways. This work provides an insight into the reduction mechanism of Np(VI) with hydrazine derivatives from the theoretical perspective and helps to design more effective reductants for the separation of U/Np and Np/Pu in spent fuel reprocessing.
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Affiliation(s)
- Xiao-Bo Li
- Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, 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
| | - Shun-Yan Ning
- Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
| | - Yue-Zhou Wei
- Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China.,Shanghai Jiao Tong University, Shanghai 200240, 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
| | - Wei-Qun Shi
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
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12
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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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13
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Zhang X, Kong X, Yuan L, Chai Z, Shi W. Coordination of Eu(III) with 1,10-Phenanthroline-2,9-dicarboxamide Derivatives: A Combined Study by MS, TRLIF, and DFT. Inorg Chem 2019; 58:10239-10247. [DOI: 10.1021/acs.inorgchem.9b01400] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xinrui Zhang
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
- University of Chinese Academy of Science, Beijing 100049, People’s Republic of China
| | - Xianghe Kong
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Liyong Yuan
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Zhifang Chai
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
- Engineering Laboratory of Advanced Energy Materials, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, People’s Republic of China
| | - Weiqun Shi
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
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14
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Arumugam K, Burton NA. Uranyl-Bound Tetra-Dentate Non-Innocent Ligands: Prediction of Structure and Redox Behaviour Using Density Functional Theory. Chemphyschem 2019; 20:1869-1878. [PMID: 31063234 DOI: 10.1002/cphc.201900301] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 05/02/2019] [Indexed: 12/28/2022]
Abstract
Computational methods have been applied to understand the reduction potentials of [UO2 -salmnt-L] complexes (L=pyridine, DMSO, DMF and TPPO), and their redox behavior is compared with previous experiments in dichloromethane solution. Since the experimental results were inconclusive regarding the influence of the uranyl-bound tetra-dentate 'salmnt' ligand, here we will show that salmnt acts as a redox-active ligand and exhibits non-innocent behavior to interfere with the otherwise expected one-electron metal (U) reduction. We have employed two approaches to determine the uranyl (VI/V) reduction potentials, using a direct study of one-electron reduction processes and an estimation of the overall reduction using isodesmic reactions. Hybrid density functional theory (DFT) methods were combined with the Conductor-like Polarizable Continuum Model (CPCM) to account for solvation effects. The computationally predicted one-electron reduction potentials for the range of [UO2 -salmnt-L] complexes are in excellent agreement with shoulder peaks (∼1.4 eV) observed in the cyclic voltammetry experiments and clearly correlate with ligand reduction. Highly conjugated pi-bonds stabilize the ligand based delocalized orbital relative to the localized U f-orbitals, and as a consequence, the ligand traps the incoming electron. A second reduction step results in metal U(VI) to U(V) reduction, in good agreement with the experimentally assigned uranyl (VI/V) reduction potentials.
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Affiliation(s)
- Krishnamoorthy Arumugam
- School of Chemistry, The University of Manchester, Oxford Road, Manchester, United Kingdom.,Current address: National Post Doctoral Fellow (NPDF) Simulation Center for Atomic and Nanoscale Materials (SCANMAT), Central University of Tamil Nadu, Thiruvarur, Tamil Nadu-, 610101, India'
| | - Neil A Burton
- School of Chemistry, The University of Manchester, Oxford Road, Manchester, United Kingdom
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15
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Chi XW, Wu QY, Lan JH, Wang CZ, Zhang Q, Chai ZF, Shi WQ. A Theoretical Study on Divalent Heavier Group 14 Complexes as Promising Donor Ligands for Building Uranium–Metal Bonds. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00059] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Xiao-Wang Chi
- College of Mining, Guizhou University, Guiyang, 550025, 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
| | - Jian-Hui Lan
- 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
| | - Qin Zhang
- College of Mining, Guizhou University, Guiyang, 550025, 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
| | - Wei-Qun Shi
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
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16
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Vijayakumar V, Ramesh Kumar C, Sivaraman N, Suresh A, Kanekar AS, Bhattacharyya A, Mohapatra PK. Novel diamide ligands with a central carbonyl group and their comparative evaluation with the diglycolamide ligand: synthesis, extraction, DFT and chromatographic studies. RADIOCHIM ACTA 2019. [DOI: 10.1515/ract-2019-3102] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The extraction behaviour of U(VI), Th(IV) and Nd(III) was investigated as a function of nitric acid concentration for diamide based extractants, namely, N,N,N′,N′-tetraoctyl-3-carbonylpentanediamide (TOCPDA) and 4-carbonyl-heptanedioic acid bis-dioctylamide (CHADA). In addition, the distribution ratio was also measured for Pu(IV) and Sr(II) with 1.1 M CHADA in n-dodecane. These extractants were synthesized by adopting simple acid, amine coupling reaction with DCC (dicyclohexylcarbodiimide) and DMAP (N,N′-dimethylaminopyridine) as the coupling agent. The newly synthesized extractants were characterized by FT-IR, NMR, Mass, CHNS and HPLC. The extraction results indicated that CHADA shown has better extraction behavior for U(VI) compared to TOCPDA. In addition, CHADA coated HPLC column was examined for the retention behaviour of U(VI), Th(IV), and Nd(III). Computation studies based on density functional theory (DFT) were carried out to understand the complexing behaviour of U(VI), Pu(IV) and Sr(II) with CHADMA and TMCPDA.
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Affiliation(s)
- Veeraragavan Vijayakumar
- Organic Chemistry Laboratory, Department of Chemistry , Veltech Rangarajan Dr. Sagunthala R & D Institute of Science and Technology , Avadi , Chennai 600 062, Tamil Nadu , India
| | - Chidambaram Ramesh Kumar
- Organic Chemistry Laboratory, Department of Chemistry , Veltech Rangarajan Dr. Sagunthala R & D Institute of Science and Technology , Avadi , Chennai 600 062, Tamil Nadu , India
| | - Nagarajan Sivaraman
- Indira Gandhi Centre for Atomic Research, Homi Bhabha National Institute , Kalpakkam 603102 , India
| | - Ammath Suresh
- Indira Gandhi Centre for Atomic Research, Homi Bhabha National Institute , Kalpakkam 603102 , India
| | - Avinash S. Kanekar
- Radiochemistry Division, Bhabha Atomic Research Centre , Mumbai 400085 , India
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17
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Zheng M, Chen FY, Li L, Guo YR, Pan QJ. Accessibility of Uranyl–Plutonium Complex Supported by a Polypyrrolic Macrocycle: An Implication for Experimental Synthesis. Inorg Chem 2018; 58:950-959. [DOI: 10.1021/acs.inorgchem.8b03112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ming Zheng
- Key Laboratory of Bio-Based Material Science & Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Fang-Yuan Chen
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Li Li
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
| | - Yuan-Ru Guo
- Key Laboratory of Bio-Based Material Science & Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, China
| | - Qing-Jiang Pan
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
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18
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Yang LL, Kong XH, Wu ZL, Lin YW, Liao LF, Nie CM. Theoretical investigation into the coordination ofR-/S-asymmetric uranyl-salophens containing six-membered ring lactam withcis−/trans-cyclohexylamines. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4387] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Liang-Liang Yang
- School of Chemistry and Chemical Engineering; University of South China; Hengyang 421001 China
| | - Xiang-He Kong
- School of Chemistry and Chemical Engineering; University of South China; Hengyang 421001 China
| | - Zhi-Lin Wu
- School of Chemistry and Chemical Engineering; University of South China; Hengyang 421001 China
| | - Ying-Wu Lin
- School of Chemistry and Chemical Engineering; University of South China; Hengyang 421001 China
| | - Li-Fu Liao
- School of Chemistry and Chemical Engineering; University of South China; Hengyang 421001 China
| | - Chang-Ming Nie
- School of Chemistry and Chemical Engineering; University of South China; Hengyang 421001 China
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19
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Das B, McPherson JN, Colbran SB. Oligomers and macrocycles with [m]pyridine[n]pyrrole (m + n ≥ 3) domains: Formation and applications of anion, guest molecule and metal ion complexes. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.02.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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20
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Hu SX, Liu JJ, Gibson JK, Li J. Periodic Trends in Actinyl Thio-Crown Ether Complexes. Inorg Chem 2018; 57:2899-2907. [DOI: 10.1021/acs.inorgchem.7b03277] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shu-Xian Hu
- Beijing Computational Science Research Center, Beijing 100193, China
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China
| | - Jing-Jing Liu
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China
| | - John K. Gibson
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jun Li
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China
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21
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Huang PW, Wang CZ, Wu QY, Lan JH, Song G, Chai ZF, Shi WQ. Uncovering the impact of 'capsule' shaped amine-type ligands on Am(iii)/Eu(iii) separation. Phys Chem Chem Phys 2018; 20:1030-1038. [PMID: 29236107 DOI: 10.1039/c7cp05381a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Separation of trivalent actinides (An(iii)) and lanthanides (Ln(iii)) in spent nuclear fuel reprocessing is extremely challenging mainly owing to their similar chemical properties. Two amine-type reagents, tetrakis(2-pyridyl-methyl)-1,2-ethylenediamine (TPEN) and its hydrophobic derivative N,N,N',N'-tetrakis((4-butoxypyridin-2-yl)methyl)-ethylenediamine (TBPEN), have been identified to possess a selectivity for Am(iii) over Eu(iii). In this work, the structures, bonding nature, and thermodynamic behaviors of the Am(iii) and Eu(iii) complexes with these two ligands have been systematically studied via scalar relativistic density functional theory (DFT) calculations. According to Mayer bond order and the quantum theory of atoms in molecules (QTAIM) analyses, interactions between the ligands and metal cations exhibit some degree of covalent character with relatively more covalency for Am(iii) complexes. In comparison with TPEN, TBPEN has better extractability but worse separation ability for Am(iii) and Eu(iii). Four nitrogen atoms in pyridine moieties may be responsible for the different extraction abilities of TPEN and TBPEN, while two nitrogen atoms in amine chains of these ligands appear to play more important roles in the separation of Am(iii)/Eu(iii). These different extraction behaviors may be attributed to the longer and thinner 'capsule' shaped TBPEN ligand compared to TPEN. Our study might provide new insights into understanding the selectivity of the amine-type ligands toward minor actinides, and pave the way for designing new TPEN derivatives for extraction and separation of An(iii)/Ln(iii).
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Affiliation(s)
- Pin-Wen Huang
- Laboratory of Nuclear Energy Chemistry and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
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22
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Adsorption of 5f-electron atoms (Th Cm) on graphene surface: An all-electron ZORA-DFT study. J Colloid Interface Sci 2017; 508:159-166. [DOI: 10.1016/j.jcis.2017.08.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Revised: 07/22/2017] [Accepted: 08/05/2017] [Indexed: 11/20/2022]
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23
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Lü L, Liu J, Yang Y, Li K, Hu S, Luo S. Complexation of a macrocyclic ligand, 2,6-di (N-methyl)formamide-calix[4]pyridine, with Eu(III) and extraction of Eu(III) and Am(III). RADIOCHIM ACTA 2017. [DOI: 10.1515/ract-2017-2852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Complexation of a new macrocyclic compound, 2,6-dimethylformamide-calix[4]pyridine (L1
), with Eu(III) was studied by spectrophotometry. Stability constants of the Eu(III)/L1
complex in different solvents were determined. The results reveal that L1
forms moderately strong complexes with Eu(III) and other lanthanides in aprotic solvents and shows little binding ability with transition metals. Moreover, the binding strength of L1
weakens significantly in protic solvents. Using 2-bromodecanoic acid as the synergistic reagent, L1
extracts Am(III) and Eu(III) successfully with a separation factor of SFAm/Eu=1.3, and the distribution ratios of Am(III) and Eu(III) increases as the aqueous acidity is decreased. DFT computational studies were conducted to corroborate the solvent extraction data, and compare the coordination properties of Am(III)/Eu(III) complexes with L1
and a related, 2,6-diformamide-calix[4]pyridine (L2
). The computational results suggest that L2
could form stable complexes [ML]3+ and ML(NO3)3 [where M represent Am(III) or Eu(III)] in aqueous phase, in sharp contrast to the case of L1
where such complexes in aqueous phase are not stable.
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Affiliation(s)
- Lina Lü
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics , Mianyang 621900 , China
| | - Jun Liu
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics , Mianyang 621900 , China
| | - Yanqiu Yang
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics , Mianyang 621900 , China
| | - Kun Li
- College of Chemistry, Sichuan University , Chengdu 610064 , China
| | - Sheng Hu
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics , Mianyang 621900 , China
| | - Shunzhong Luo
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics , Mianyang 621900 , China
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24
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Lan JH, Chai ZF, Shi WQ. A combined DFT and molecular dynamics study of U(VI)/calcite interaction in aqueous solution. Sci Bull (Beijing) 2017; 62:1064-1073. [PMID: 36659333 DOI: 10.1016/j.scib.2017.07.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 06/28/2017] [Accepted: 07/04/2017] [Indexed: 01/21/2023]
Abstract
Here we present a combined DFT and molecular dynamics study of uranyl (U(VI)) interaction mechanisms with the calcite (104) surface in aqueous solution. The roles of three anion ligands (CO32-, HCO3-, OH-) and solvation effect in U(VI) interaction with calcite have been evaluated. According to our calculations, water adsorbed on the calcite (104) surface prefers to exist in molecular state rather than dissociative state. Energy analysis indicate that the positively charged uranyl species prefers to form surface complexes on the surface, while neutral uranyl species may bind with the surface via both surface complexing and ion exchange reactions of U(VI)→Ca(II). In contrast, the negatively charged uranyl species prefer to interact with the surface via ion exchange reactions of U(VI)→Ca(II), and the one with UO2(CO3)2(H2O)2- as the reactant becomes the most favorable one in energy. We also found that uranyl adsorption increases the hydrophilicability of the (104) surface to different extents, where the UO2(CO3)3Ca2 species contributes to the largest degree of energy changes (-53kcal/mol). Our calculations proved that the (104) surface also has the ability to immobilize U(VI) via either surface complexing or ion exchange mechanisms under different pH values.
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Affiliation(s)
- Jian-Hui Lan
- Laboratory of Nuclear Energy Chemistry, and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Zhi-Fang Chai
- Laboratory of Nuclear Energy Chemistry, and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; School of Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
| | - Wei-Qun Shi
- Laboratory of Nuclear Energy Chemistry, and Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
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25
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Huang PW, Wang CZ, Chai ZF, Shi WQ. A theoretical study on geometry, bonding nature, and stability of several anhydrous and hydrated In(III), Gd(III) and Yb(III) complexes in liquid scintillator solvents. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.04.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Di Pietro P, Kerridge A. Ligand size dependence of U–N and U–O bond character in a series of uranyl hexaphyrin complexes: quantum chemical simulation and density based analysis. Phys Chem Chem Phys 2017; 19:7546-7559. [DOI: 10.1039/c6cp08783c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A quantum chemical and density based analysis of bonding in uranyl hexaphyrin complexes, looking for trends in stability and covalency.
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27
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Brewster JT, He Q, Anguera G, Moore MD, Ke XS, Lynch VM, Sessler JL. Synthesis and characterization of a dipyriamethyrin–uranyl complex. Chem Commun (Camb) 2017; 53:4981-4984. [DOI: 10.1039/c7cc01674c] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A bench stable uranyl complex of a hexaazadipyriamethryin macrocyclic ligand has been prepared and characterized.
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Affiliation(s)
- James T. Brewster
- Department of Chemistry, The University of Texas at Austin, 105 East 24th, Street-Stop A5300
- Austin
- USA
| | - Qing He
- Department of Chemistry, The University of Texas at Austin, 105 East 24th, Street-Stop A5300
- Austin
- USA
| | - Gonzalo Anguera
- Department of Chemistry, The University of Texas at Austin, 105 East 24th, Street-Stop A5300
- Austin
- USA
| | - Matthew D. Moore
- Department of Chemistry, The University of Texas at Austin, 105 East 24th, Street-Stop A5300
- Austin
- USA
| | - Xian-Sheng Ke
- Department of Chemistry, The University of Texas at Austin, 105 East 24th, Street-Stop A5300
- Austin
- USA
| | - Vincent M. Lynch
- Department of Chemistry, The University of Texas at Austin, 105 East 24th, Street-Stop A5300
- Austin
- USA
| | - Jonathan L. Sessler
- Department of Chemistry, The University of Texas at Austin, 105 East 24th, Street-Stop A5300
- Austin
- USA
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28
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Gogoi S, Saikia MD. Adsorptive interaction of 90Y and 90Sr with diglycolamide based resin: a density functional theory. J Radioanal Nucl Chem 2016. [DOI: 10.1007/s10967-016-5068-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Niu Y, Yang J, Qu R, Gao Y, Du N, Chen H, Sun C, Wang W. Synthesis of Silica-Gel-Supported Sulfur-Capped PAMAM Dendrimers for Efficient Hg(II) Adsorption: Experimental and DFT Study. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b00172] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuzhong Niu
- School
of Chemistry and Materials
Science, Ludong University, Yantai 264025, P.R. China
| | - Jinyun Yang
- School
of Chemistry and Materials
Science, Ludong University, Yantai 264025, P.R. China
| | - Rongjun Qu
- School
of Chemistry and Materials
Science, Ludong University, Yantai 264025, P.R. China
| | - Yanhong Gao
- School
of Chemistry and Materials
Science, Ludong University, Yantai 264025, P.R. China
| | - Na Du
- School
of Chemistry and Materials
Science, Ludong University, Yantai 264025, P.R. China
| | - Hou Chen
- School
of Chemistry and Materials
Science, Ludong University, Yantai 264025, P.R. China
| | - Changmei Sun
- School
of Chemistry and Materials
Science, Ludong University, Yantai 264025, P.R. China
| | - Wenxiang Wang
- School
of Chemistry and Materials
Science, Ludong University, Yantai 264025, P.R. China
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30
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