1
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Yang X, Xu L, Fang D, Zhang A, Xiao C. Progress in phenanthroline-derived extractants for trivalent actinides and lanthanides separation: where to next? Chem Commun (Camb) 2024; 60:11415-11433. [PMID: 39235311 DOI: 10.1039/d4cc03810j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2024]
Abstract
Spent nuclear fuel (SNF) released from reactors possesses significant radioactivity, heat release properties, and high-value radioactive nuclides. Therefore, using chemical methods for reprocessing can enhance economic efficiency and reduce the potential environmental risks of nuclear energy. Due to the presence of relatively diffuse f-electrons, the chemical properties of trivalent lanthanides (Ln(III)) and actinides (An(III)) in SNF solutions are quite similar. Separation methods have several limitations, including poor separation efficiency and the need for multiple stripping agents. The use of novel multi-dental phenanthroline-derived extractants with nitrogen donor atoms to effectively separate An(III) over Ln(III) has been widely accepted. This review first introduces the development history of phenanthroline-derived extractants for extraction and complexation with An(III) over Ln(III). Then, based on structural differences, these extractants are classified into four categories: nitrogen-coordinated, N,O-hybrid coordinated, highly preorganized structure, and unsymmetric structure. Each category's design principles, extraction, and separation performance as well as their advantages and disadvantages are discussed. Finally, we have summarized and compared the unique characteristics of the existing extractants and provided an outlook. This work may offer a reliable reference for the precise identification and selective separation between An(III) and Ln(III), and point the way for future development and exploration.
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Affiliation(s)
- Xiaofan Yang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China.
| | - Lei Xu
- Institute of Nuclear-Agricultural Science, Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agriculture and Zhejiang Province, Zhejiang University, Hangzhou 310058, China
| | - Dong Fang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China.
- Institute of Zhejiang University-Quzhou, Quzhou 324000, China
| | - Anyun Zhang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China.
| | - Chengliang Xiao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China.
- Institute of Zhejiang University-Quzhou, Quzhou 324000, China
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2
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Schlittenhardt S, Vasilenko E, Unni C V, Jobbitt N, Fuhr O, Hunger D, Ruben M, Kuppusamy SK. Spectral Hole-Burning Studies of a Mononuclear Eu(III) Complex Reveal Narrow Optical Linewidths of the 5D 0→ 7F 0 Transition and Seconds Long Nuclear Spin Lifetimes. Chemphyschem 2024; 25:e202400280. [PMID: 38887965 DOI: 10.1002/cphc.202400280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 06/10/2024] [Accepted: 06/17/2024] [Indexed: 06/20/2024]
Abstract
Coordination complexes of rare-earth ions (REI) show optical transitions with narrow linewidths enabling the creation of coherent light-matter interfaces for quantum information processing (QIP) applications. Among the REI-based complexes, Eu(III) complexes showing the 5D0→7F0 transition are of interest for QIP applications due to the narrow linewidths associated with the transition. Herein, we report on the synthesis, structure, and optical properties of a novel Eu(III) complex and its Gd(III) analogue composed of 2,9-bis(pyrazol-1-yl)-1,10-phenanthroline (dpphen) and three nitrate (NO3) ligands. The Eu(III) complex-[Eu(dpphen)(NO3)3]-showed sensitized metal-centred emission (5D0→7FJ; J=0,1,2,3, 4, 5, or 6) in the visible region, upon irradiation of the ligand-centred band at 369 nm, with the 5D0→7F0 transition centred at 580.9 nm. Spectral hole-burning (SHB) studies of the complex with stoichiometric Eu(III) concentration revealed a narrow homogeneous linewidth (Γh) of 1.55 MHz corresponding to a 0.205 μs long optical coherence lifetime (T2opt). Remarkably, long nuclear spin lifetimes (T1spin) of up to 41 s have been observed for the complex. The narrow optical linewidths and long T1spin lifetimes obtained for the Eu(III) complex showcase the utility of Eu(III) complexes as tuneable, following molecular engineering principles, coherent light-matter interfaces for QIP applications.
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Affiliation(s)
- Sören Schlittenhardt
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Kaiserstraße 12, 76131, Karlsruhe, Germany
| | - Evgenij Vasilenko
- Institute of Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Kaiserstraße 12, 76131, Karlsruhe, Germany
- Physikalisches Institut (PHI), Karlsruhe Institute of Technology (KIT), Kaiserstraße 12, 76131, Karlsruhe, Germany
| | - Vishnu Unni C
- Physikalisches Institut (PHI), Karlsruhe Institute of Technology (KIT), Kaiserstraße 12, 76131, Karlsruhe, Germany
| | - Nicholas Jobbitt
- Physikalisches Institut (PHI), Karlsruhe Institute of Technology (KIT), Kaiserstraße 12, 76131, Karlsruhe, Germany
| | - Olaf Fuhr
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Kaiserstraße 12, 76131, Karlsruhe, Germany
- Karlsruhe Nano Micro Facility (KNMFi), Karlsruhe Institute of Technology (KIT), Kaiserstraße 12, 76131, Karlsruhe, Germany
| | - David Hunger
- Institute of Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Kaiserstraße 12, 76131, Karlsruhe, Germany
- Physikalisches Institut (PHI), Karlsruhe Institute of Technology (KIT), Kaiserstraße 12, 76131, Karlsruhe, Germany
| | - Mario Ruben
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Kaiserstraße 12, 76131, Karlsruhe, Germany
- Institute of Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Kaiserstraße 12, 76131, Karlsruhe, Germany
- Centre Européen de Sciences Quantiques (CESQ), Institut de Science et d'Ingénierie Supramoléculaires (ISIS), 8 allée Gaspard Monge, BP 70028, 67083, Strasbourg Cedex, France
| | - Senthil Kumar Kuppusamy
- Institute of Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology (KIT), Kaiserstraße 12, 76131, Karlsruhe, Germany
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3
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Yang JF, Ma YY, Xie N, Tang YT, Du J, Yin XR, Lin ZG, Han ZG. In Situ Ligand-Transformation-Assisted Assembly of a Polyoxometalate and Silver-Phosphine Oxide Cluster for Colorimetric Detection of Phenol Contaminants. Inorg Chem 2024; 63:18200-18210. [PMID: 39302043 DOI: 10.1021/acs.inorgchem.4c03067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/22/2024]
Abstract
In situ ligand transformation strategies represent an efficient pathway for constructing function-oriented polyoxometalate (POM)-based crystalline materials. Herein, three POM-based hybrid networks were synthesized through in situ transformation of the phosphine ligand, formulated as [Ag(dppeo)6][H2PMo12O40]·5H2O (1), [Ag(dedpo)]4[SiW12O40]·6H2O (2), and [Ag(dppeo)]3[PW12O40]·3H2O (3) (dedpo = (2-(diphenylphosphaneyl)ethyl)diphenylphosphine oxide; dppeo = ethane-1,2-diylbis(diphenylphosphine oxide)). During the synthesis of these compounds, the 1,2-diphenylphosphine ethane molecule underwent in situ oxidation, transforming into dppeo and dedpo ligands, respectively. Compound 1 features a supramolecular architecture assembled from [Ag(dppeo)3]+/[Ag2(dppeo)6]2+ cationic clusters with disordered Ag centers and protonated [H2PMo12O40]- anions. Compound 2 presents a 3-D POM-supported metal-organic framework consisting of binuclear [Ag(dedpo)]22+ units, {-dedpo-Ag-dedpo-} chains, and [SiW12O40]4- polyoxoanions. Compound 3 displays a 2-D layered structure formed by {-dppeo-Ag3-dppeo-} chains and [PW12O40]3- clusters. Pronounced argentophilic interactions are observed in compounds 1 and 3. The three compounds demonstrate satisfactory heterogeneous catalytic activity in the colorimetric detection reactions toward phenol pollutants with detection limits of 1.73, 1.92, and 4.6 μM, respectively. Additionally, compounds 1-3 show high anti-interference capabilities and high sensitivity in differentiating phenol from its halogenated derivatives. This work presents some guidance for designing specific function-oriented POM-based materials via an in situ ligand transformation strategy.
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Affiliation(s)
- Jun-Fang Yang
- Hebei Technology Innovation Center for Energy Conversion Materials and Devices, National Demonstration Center for Experimental Chemistry Education, Testing and Analysis Center, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, P. R. China
| | - Yuan-Yuan Ma
- Hebei Technology Innovation Center for Energy Conversion Materials and Devices, National Demonstration Center for Experimental Chemistry Education, Testing and Analysis Center, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, P. R. China
| | - Nan Xie
- Hebei Technology Innovation Center for Energy Conversion Materials and Devices, National Demonstration Center for Experimental Chemistry Education, Testing and Analysis Center, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, P. R. China
| | - Yu-Tao Tang
- Hebei Technology Innovation Center for Energy Conversion Materials and Devices, National Demonstration Center for Experimental Chemistry Education, Testing and Analysis Center, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, P. R. China
| | - Jing Du
- Hebei Technology Innovation Center for Energy Conversion Materials and Devices, National Demonstration Center for Experimental Chemistry Education, Testing and Analysis Center, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, P. R. China
| | - Xin-Ran Yin
- Hebei Technology Innovation Center for Energy Conversion Materials and Devices, National Demonstration Center for Experimental Chemistry Education, Testing and Analysis Center, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, P. R. China
| | - Zheng-Guo Lin
- Hebei Technology Innovation Center for Energy Conversion Materials and Devices, National Demonstration Center for Experimental Chemistry Education, Testing and Analysis Center, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, P. R. China
| | - Zhan-Gang Han
- Hebei Technology Innovation Center for Energy Conversion Materials and Devices, National Demonstration Center for Experimental Chemistry Education, Testing and Analysis Center, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, P. R. China
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4
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Fang D, Yang X, Li J, Zhang Z, Gao Y, Xiao C. Preorganization Effects on Eu(III) Ion Coordination by Dipyridyl-Phenanthroline Ligands: A Combined Experimental and Theoretical Analysis. Inorg Chem 2024; 63:8171-8179. [PMID: 38655575 DOI: 10.1021/acs.inorgchem.4c00395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Although 1,10-phenanthroline has been proven to hold a strong complexing capacity for f-block elements and their derivatives have been applied in many fields, research on more highly or completely rigid phenanthroline ligands is still rare due to the challenging syntheses. Here, we reported three tetradentate ligands 2,9-di(pyridin-2-yl)-1,10-phenanthroline (L1), 12-(pyridin-2-yl)-5,6-dihydroquinolino[8,7b][1,10]phenanthroline (L2), and 5,6,11,12-tetrahydrobenzo[2,1-b:3,4-b']bis([1,10]phenanthroline) (L3) with increasing preorganization on the side chain; among which, L3 is fully preorganized. Their complexation reactions with Eu(III) were systematically investigated by electrospray ionization mass spectrometry (ESI-MS), UV-vis titrations, and single-crystal structures. It is found that all three ligands form only 1:1 M/L complexes with Eu(III). The single-crystal structures revealed that the three ligands hold similar coordination modes, while their stability constants determined by UV-vis titrations were L3 (4.80 ± 0.01) > L2 (4.38 ± 0.01) > L1 (3.88 ± 0.01). This trend is supported not only by the thermodynamic stability of rigid ligands compared to free ligands but also by the conclusion that rigid ligands exhibit faster reaction rates (lower energy barrier) than free ligands kinetically. This work is helpful in providing theoretical guidance for the subsequent development of highly preorganized chelating ligands with strong coordination ability and high selectivity for f-block elements.
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Affiliation(s)
- Dong Fang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China
- Institute of Zhejiang University-Quzhou, Quzhou 324000, China
| | - Xiaofan Yang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China
| | - Jiarui Li
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, Sichuan, China
| | - Zhiyuan Zhang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, Sichuan, China
| | - Yang Gao
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, Sichuan, China
| | - Chengliang Xiao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China
- Institute of Zhejiang University-Quzhou, Quzhou 324000, China
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5
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Zhang X, Ye L, Chen W, Zhang X, Chen W, Chen M, Huang P. Theoretical Study of Am(III) and Eu(III) Separation by a Bipyridyl Phosphate Ligand. ACS OMEGA 2024; 9:12060-12068. [PMID: 38496969 PMCID: PMC10938453 DOI: 10.1021/acsomega.3c09940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 02/07/2024] [Accepted: 02/14/2024] [Indexed: 03/19/2024]
Abstract
Actinide An(III) and lanthanide Ln(III) are known to exhibit similar chemical properties; thus, it is difficult to distinguish them in the separation of highly radioactive waste liquids. One potential method to efficiently separate actinides and lanthanides involves the design and development of phosphorus-oxygen-bonded ligands with solvent extraction separation. Here, a bipyridine phosphate ligand with two isopropyl and phosphate groups is introduced to selectively extract actinides. The electronic structure, bonding properties, thermodynamic behavior, and quantum theory of atoms in molecules (QTAIM) of Am(III) and Eu(III) complexes with the bipyridine phosphate ligands were analyzed by using density functional theory (DFT) calculations. The analysis demonstrates that the Am-N bond exhibits stronger covalent characteristics than the Eu-N bond, indicating that the bipyridine phosphate ligand had better selectivity for Am(III) than for Eu(III) in terms of binding affinity. The thermodynamic analysis established the complex [ML(NO3)2(H2O)2]+ as the most stable species during the complexation process. The results indicate great potential for utilizing the bipyridine phosphate ligand for the effective separation of An(III)/Ln(III) in spent fuel reprocessing experiments.
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Affiliation(s)
- Xinyi Zhang
- Key
Laboratory of Intelligent Manufacturing Quality Big Data Tracing and
Analysis of Zhejiang Province, College of Science, China Jiliang University, Hangzhou 310018, China
| | - Lulu Ye
- Key
Laboratory of Intelligent Manufacturing Quality Big Data Tracing and
Analysis of Zhejiang Province, College of Science, China Jiliang University, Hangzhou 310018, China
| | - Weihao Chen
- Key
Laboratory of Intelligent Manufacturing Quality Big Data Tracing and
Analysis of Zhejiang Province, College of Science, China Jiliang University, Hangzhou 310018, China
| | - Xiaofei Zhang
- Key
Laboratory of Intelligent Manufacturing Quality Big Data Tracing and
Analysis of Zhejiang Province, College of Science, China Jiliang University, Hangzhou 310018, China
| | - Weiwei Chen
- Key
Laboratory of Intelligent Manufacturing Quality Big Data Tracing and
Analysis of Zhejiang Province, College of Science, China Jiliang University, Hangzhou 310018, China
| | - Miaogen Chen
- Key
Laboratory of Intelligent Manufacturing Quality Big Data Tracing and
Analysis of Zhejiang Province, College of Science, China Jiliang University, Hangzhou 310018, China
| | - Pinwen Huang
- Zhejiang
University of Water Resources and Electric Power, Hangzhou 310018, China
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6
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Wang S, Yang X, Liu Y, Xu L, Xu C, Xiao C. Enhancing the Selectivity of Trivalent Actinide over Lanthanide Using Asymmetrical Phenanthroline Diamide Ligands. Inorg Chem 2024; 63:3063-3074. [PMID: 38285631 DOI: 10.1021/acs.inorgchem.3c03997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Abstract
Phenanthroline diamide ligands have been widely used in the separation of trivalent actinides and lanthanides, but little research has focused on extractants with asymmetrical substitutes. Two novel asymmetrical phenanthroline-based ligands N2,N2,N9-triethyl-N9-tolyl-1,10-phenanthroline-2,9-dicarboxamide (DE-ET-DAPhen) and N2-ethyl-N9,N9-dioctyl-N2-tolyl-1,10-phenanthroline-2,9-dicarboxamide (DO-ET-DAPhen) were first synthesized in this work, whose extraction ability and complexation mechanism to trivalent actinides [An(III)] and lanthanides [Ln(III)] were systematically investigated. The ligands dissolved in n-octanol exhibit good extraction ability and high selectivity toward Am(III) in acidic solutions. The complexation mechanism of the ligands with Ln(III) in solution and solid state was analyzed using slope analysis, 1H NMR spectrometric titration, ESI-MS, and calorimetric titration. It is revealed that the ligands complex with Am(III)/Eu(III) with 1:1 stoichiometry. The stability constant (log β) of the complexation reaction of Eu(III) with DE-ET-DAPhen determined by UV-vis spectrophotometric and calorimetric titration is higher than that of DO-ET-DAPhen, indicating the stronger complexation ability of DE-ET-DAPhen. Meanwhile, the calorimetric titration results show that the complexation process is exothermic with a decreased entropy. The structures of 1:1 complexes of Eu(III) and Nd(III) with DE-ET-DAPhen were analyzed through single-crystal X-ray diffraction. This work proves that ligands containing asymmetrical functional groups are promising for An(III)/Ln(III) separation, which shows great significance in efficient extractants designed for the spent nuclear fuel reprocessing process.
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Affiliation(s)
- Shihui Wang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China
| | - Xiaofan Yang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China
| | - Yaoyang Liu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Lei Xu
- Institute of Nuclear-Agricultural Science, Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agriculture and Zhejiang Province, Zhejiang University, Hangzhou 310058, China
- Institute of Nuclear Science and Technology, Zhejiang University, Hangzhou 310058, China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Chengliang Xiao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China
- Institute of Nuclear Science and Technology, Zhejiang University, Hangzhou 310058, China
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7
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Wang X, Song L, Yu Q, Li Q, He L, Xiao X, Pan Q, Yang Y, Ding S. Complexation of a Nitrilotriacetate-Derived Triamide Ligand with Trivalent Lanthanides: A Thermodynamic and Crystallographic Study. Inorg Chem 2023; 62:3916-3928. [PMID: 36821293 DOI: 10.1021/acs.inorgchem.2c04311] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Non-heterocyclic N-donor nitrilotriacetate-derived triamide ligands are one of the most promising extractants for the selective extraction separation of trivalent actinides over lanthanides, but the thermodynamics and mechanism of the complexation of this kind of ligand with actinides and lanthanides are still not clear. In this work, the complexation behaviors of N,N,N',N',N″,N″-hexaethylnitrilotriacetamide (NTAamide(Et)) with four representative trivalent lanthanides (La3+, Nd3+, Eu3+, and Lu3+) were systematically investigated by using 1H nuclear magnetic resonance (1H NMR), ultraviolet-visible (UV-vis) and fluorescence spectrophotometry, microcalorimetry, and single-crystal X-ray diffractometry. 1H NMR spectroscopic titration of La3+ and Lu3+ indicates that two species of 1:2 and 1:1 metal-ligand complexes were formed in NO3- and ClO4- media. The stability constants of NTAamide(Et) with Nd3+ and Eu3+ obtained by UV-vis and fluorescence titration show that the complexing strength of NTAamide(Et) with Nd3+ is lower than that with Eu3+ in the same anionic medium, while that of the same lanthanide complex is higher in ClO4- medium than in NO3- medium. Meanwhile, the formation reactions for all metal-ligand complexes are driven by both enthalpy and entropy. The structures of lanthanide complexes in the single ClO4- and NO3- medium and the mixed one were determined to be [LnL2(MeOH)](ClO4)3 (Ln = La, Nd, Eu, and Lu), [LaL2(EtOH)2][La(NO3)6], and [LaL2(NO3)](ClO4)2, separately. The average bond lengths of lanthanide complexes decrease gradually with the decrease in ionic radii of Ln3+, indicating that heavier lanthanides form stronger complexes due to the lanthanide contraction effect, which coincides with the trend of the complexing strength obtained by spectroscopic titration. This work not only reveals the thermodynamics and mechanism of the complexation between NTAamide ligands and lanthanides but also obtains the periodic tendency of complexation between them, which may facilitate the separation of trivalent lanthanides from actinides.
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Affiliation(s)
- Xueyu Wang
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Lianjun Song
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Qiao Yu
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Qiuju Li
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Lanlan He
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Xiao Xiao
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Qingjiang Pan
- School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, P. R. China
| | - Yanqiu Yang
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621999, P. R. China
| | - Songdong Ding
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
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8
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Ebenezer C, Solomon RV. Complexation of N‐Heterocyclic Substituted 1,10‐Phenanthroline‐2,9‐diamide with Am
3+
/Eu
3+
Ions for Nuclear Waste Water Treatment. ChemistrySelect 2022. [DOI: 10.1002/slct.202203535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Cheriyan Ebenezer
- Department of Chemistry Madras Christian College (Autonomous) [Affiliated to the University of Madras Chennai 600 059 Tamil Nadu India
| | - Rajadurai Vijay Solomon
- Department of Chemistry Madras Christian College (Autonomous) [Affiliated to the University of Madras Chennai 600 059 Tamil Nadu India
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9
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Konopkina EA, Matveev PI, Huang PW, Kirsanova AA, Chernysheva MG, Sumyanova TB, Domnikov KS, Shi WQ, Kalmykov SN, Petrov VG, Borisova NE. Pyridine-di-phosphonates as chelators for trivalent f-elements: kinetics, thermodynamic and interfacial study of Am(III)/Eu(III) solvent extraction. Dalton Trans 2022; 51:11180-11192. [PMID: 35801576 DOI: 10.1039/d2dt01007k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The fractionation of high-level radioactive waste from nuclear power plants simplifies the handling of its components, and facilitates the reduction of radiotoxic effects on the environment. The search and study of new ligands for solvent extraction, as one of the methods in fractionation, remains a complex and important research task. In this work, four pyridine diphosphonate ligands were synthesized. These ligands are part of the class of the N,O-donor extractants, which are selective towards Am(III). The separation factor SF(Am/Eu) for the best extractant reached values up to 10. The influence of the substituents on the efficiency of extraction and complexation of trivalent f-elements, the kinetics of extraction, and the behavior of the ligand at the interface were described. The effect of nitric acid concentration on the extraction was shown. The stoichiometry of the complexes was determined by slope analysis in solvent extraction experiment and verified by spectrophotometric titration in acetonitrile. Liquid tension experiments with a pendant drop method revealed the interfacial properties of the ligands in "F-3 solvent/H2O" and "F-3 solvent/HNO3" systems. The relationship between the surface activity and the ligand structure was shown. Studies of the extraction kinetics were performed in a modified Lewis cell. The effect of the ligand structure on the extraction rate was shown. The DFT calculation with the B3LYP density functional was used to explain the extraction properties of the ligands, including selectivity. The calculation of the pre-organization energy of the ligands explained the kinetics and extraction patterns for the studied series.
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Affiliation(s)
- Ekaterina A Konopkina
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation.
| | - Petr I Matveev
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation.
| | - Pin-Wen Huang
- Zhejiang University of Water Resources and Electric Power, Hangzhou, 310018, China
| | - Anna A Kirsanova
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation.
| | - Maria G Chernysheva
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation.
| | - Tsagana B Sumyanova
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation.
| | - Kirill S Domnikov
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation.
| | - Wei-Qun Shi
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Stepan N Kalmykov
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation.
| | - Vladimir G Petrov
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation.
| | - Nataliya E Borisova
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation.
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10
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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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11
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Huang PW. Theoretical unraveling of the separation of trivalent Am and Eu ions by phosphine oxide ligands with different central heterocyclic moieties. Dalton Trans 2022; 51:7118-7126. [PMID: 35466979 DOI: 10.1039/d2dt00509c] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The treatment of nuclear spent fuels, especially the separation of minor actinides, is an imperative task for the healthy development of the nuclear industry. Up to now, it still remains a worldwide challenge to separate trivalent An3+ from Ln3+ because of their similar chemical properties. Therefore, investigating the mechanism behind the selective extraction of An3+ by theoretical methods is necessary. In this work, three phosphine oxide ligands with the same side structures but different bridging frameworks, Ph2PyPO, Ph2BipyPO and Ph2PhenPO, were investigated theoretically, and compared with each other using relativistic density functional theory. The results of QTAIM and MBO suggest that the Am-N bonds in the studied complexes have more covalent character than those in the Eu-N bonds, whereas the PDOS analysis indicates that more overlap exists between Am-5f and the Ph2PyPO's N-2p orbital than between Am-5f and Ph2BipyPO's N-2p, and Am-5f and Ph2PhenPO's N-2p orbital. However, the studied ligands all possess stronger affinities towards Am3+ than Eu3+, which partly results in the Am3+ selectivity towards Eu3+ in these three ligands. The calculated reaction free energy can reproduce the Am/Eu separation ability difference of three ligands well. This work offers some useful information for An/Ln separation of phosphine oxide ligands, and may help to design more efficient An3+/Ln3+ separation ligands.
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Affiliation(s)
- Pin-Wen Huang
- Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, People's Republic of China.
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12
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Sun M, Xu L, Yang X, Wang S, Lei L, Xiao C. Complexation Behaviors of a Tridentate Phenanthroline Carboxamide Ligand with Trivalent f-Block Elements in Different Anion Systems: A Thermodynamic and Crystallographic Perspective. Inorg Chem 2022; 61:2824-2834. [PMID: 35104133 DOI: 10.1021/acs.inorgchem.1c03270] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The counteranion has a strong influence on the complexation behavior of tridentate phenanthroline carboxamide ligands with actinides and lanthanides, but the thermodynamic and underlying interaction mechanism at the molecular level is still not clear. In this work, a tridentate ligand, N-ethyl-N-tolyl-2-amide-1,10-phenanthroline (Et-Tol-PTA), was synthesized, and the effects of different anions (Cl-, NO3-, and ClO4-) on the complexation behavior of Et-Tol-PTA with typical lanthanides were thoroughly studied by using 1H nuclear magnetic resonance (NMR) spectroscopy, ultraviolet-visible (UV-vis) spectrophotometry, and single-crystal X-ray diffraction. The NMR spectroscopic titration of Lu(III) showed that there were three species (1:1, 2:1, and 3:1 ligand-metal complexes) formed in Cl- solution systems while two species (2:1 and 1:1) were formed in NO3- and ClO4- solution systems. When Et-Tol-PTA was titrated with La(III), two species (2:1 and 1:1) were formed in NO3- systems and only one species (1:1) was formed in Cl- and ClO4- systems. In addition, the stability constant was determined via UV-vis spectroscopic titration, which showed that the complexation strength between Et-Tol-PTA and Eu(III) decreased in the following order: ClO4- > NO3- > Cl-. This indicated that Et-Tol-PTA had the strongest complexation ability with Eu(III) in the ClO4- system. The structures of Et-Tol-PTA complexed with EuCl3, Eu(NO3)3, and Eu(ClO4)3 were further elucidated by single-crystal X-ray diffraction and agreed well with the results of UV-vis titration experiments. The results of this work revealed that the mechanisms of complexation of lanthanides with the asymmetric ligand Et-Tol-PTA were strongly affected by different anionic environments in solution and in the solid state. These findings may lead to the improvement of the separation of trivalent actinides and lanthanides in nuclear waste.
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Affiliation(s)
- Mingze Sun
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Lei Xu
- Institute of Nuclear Agricultural Sciences, Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agriculture and Zhejiang Province, Zhejiang University, Hangzhou 310058, China
| | - Xiao Yang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Shihui Wang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Lecheng Lei
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Chengliang Xiao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
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13
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Lemport PS, Evsiunina MV, Matveev PI, Petrov VS, Pozdeev AS, Khult EK, Nelyubina YV, Isakovskaya KL, Roznyatovsky VA, Gloriozov IP, Tarasevich BN, Aldoshin AS, Petrov VG, Kalmykov SN, Ustynyuk YA, Nenajdenko VG. 2-Methylpyrrolidine derived 1,10-phenanthroline-2,9-diamides: promising extractants for Am( iii)/Ln( iii) separation. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00803c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work we report on new examples of phenanthrolindiamides containing asymmetric centers in amide substituents.
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Affiliation(s)
- P. S. Lemport
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - M. V. Evsiunina
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - P. I. Matveev
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - V. S. Petrov
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - A. S. Pozdeev
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - E. K. Khult
- Department of Materials Science, Lomonosov Moscow State University, Leninskie gory 1 bld. 73, Moscow 119991, Russia
| | - Yu. V. Nelyubina
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Russia
| | - K. L. Isakovskaya
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Russia
- D.I. Mendeleev University of Chemical Technology of Russia, Russia
| | - V. A. Roznyatovsky
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - I. P. Gloriozov
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - B. N. Tarasevich
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - A. S. Aldoshin
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - V. G. Petrov
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - S. N. Kalmykov
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - Yu. A. Ustynyuk
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
| | - V. G. Nenajdenko
- Department of Organic Chemistry, Lomonosov Moscow State University, 119991, Moscow, Russia
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14
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Ebenezer C, Vijay Solomon R. Preorganization of N, O-hybrid phosphine oxide chelators for effective extraction of trivalent Am/Eu ions - A computational study. NEW J CHEM 2022. [DOI: 10.1039/d1nj06029e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N, O-hybrid phosphine oxide ligands with N-heterocyclic cores are the advanced extractants for extracting actinides over lanthanides. Yet, the challenging task in designing an efficient hybrid ligand is tracing the...
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15
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Yang X, Wang S, Xu L, Yan Q, Xu C, Matveev P, Lei L, Xiao C. New tetradentate N, O-hybrid phenanthroline-derived organophosphorus extractants for the separation and complexation of trivalent actinides and lanthanides. Inorg Chem Front 2022. [DOI: 10.1039/d2qi01153k] [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
Comparison of the extraction and separation properties between two novel phenanthroline-derived organophosphorus ligands, Et-Ph-BPPhen and Et-Ph-PIPhen.
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Affiliation(s)
- Xiao Yang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Shihui Wang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Lei Xu
- Institute of Nuclear-Agricultural Science, Zhejiang University, Hangzhou 310058, China
| | - Qiang Yan
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Petr Matveev
- Radiochemistry Division, Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Lecheng Lei
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Chengliang Xiao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
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16
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Jin GY, Zhang L, Hu FZ, Hu C, Lu YL, Li YY, Han HL, Liu JM, Yang Y, Jin Q, Li XR. Photocatalysis, terahertz time domain spectroscopy and weak interactions of six polyoxometalate-based lanthanide phosphine oxide complexes. CrystEngComm 2022. [DOI: 10.1039/d2ce00779g] [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
Using triphenylphosphine oxide (OPPh3) or tetraethyl ethylenebisphosphonate (L) as ligands, phosphomolybdic acid hydrate as the anion template, six new lanthanide complexes [Nd(OPPh3)4(H2O)3](PMo12O40)∙4CH3CN (1a), [Ln(OPPh3)4(H2O)3](PMo12O40)∙4C2H5OH (2a-4a) (Ln = Dy, Ho, Er),...
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17
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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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18
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Matveev PI, Huang PW, Kirsanova AA, Ananyev IV, Sumyanova TB, Kharcheva AV, Khvorostinin EY, Petrov VG, Shi WQ, Kalmykov SN, Borisova NE. Way to Enforce Selectivity via Steric Hindrance: Improvement of Am(III)/Eu(III) Solvent Extraction by Loaded Diphosphonic Acid Esters. Inorg Chem 2021; 60:14563-14581. [PMID: 34546034 DOI: 10.1021/acs.inorgchem.1c01432] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hybrid donor extractants are a promising class of compounds for the separation of trivalent actinides and lanthanides. Here, we investigated a series of sterically loaded diphosphonate ligands based on bipyridine (BiPy-PO-iPr and BiPy-PO-cHex) and phenanthroline (Phen-PO-iPr and Phen-PO-cHex). We studied their complex formation with nitrates of trivalent f-elements in solvent extraction systems (Am and Eu) and homogeneous acetonitrile solutions (Nd, Eu, and Lu). Phenanthroline extractants demonstrated the highest efficiency and selectivity [SF(Am/Eu) up to 14] toward Am(III) extraction from nitric acid solutions among all of the studied diphosphonates of N-heterocycles. The binding constants established by UV-vis titration also indicated stronger binding of sterically impaired diphosphonates compared to the primary substituted diphosphonates. NMR titration and slope analysis during solvent extraction showed the formation of 2:1 complexes at high concentrations (>10-3 mol/L) for phenanthroline-based ligands. According to UV-vis titrations at low concentrations (10-5-10-6 mol/L), the phenanthroline-based ligands formed 1:1 complexes. Bipyridine-based ligands formed 1:1 complexes regardless of the ligand concentration. Luminescence titrations revealed that the quantum yields of the complexes with Eu(III) were 81 ± 8% (BiPy-PO-iPr) and 93 ± 9% (Phen-PO-iPr). Single crystals of the structures [Lu(μ2,κ4-(iPrO)2P(O)Phen(O)2(OiPr))(NO3)2]2 and Eu(Phen-PO-iPr)(NO3)3 were obtained by chemical synthesis with the Phen-PO-iPr ligand. X-ray diffraction studies revealed a closer contact of the f-element with the aromatic N atoms in the case of sterically loaded P═O ligands compared with sterically deficient ligands. Density functional theory calculations allowed us to rationalize the observed selectivity trends in terms of the bond length, Mayer bond order, and preorganization energy.
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Affiliation(s)
- Petr I Matveev
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation
| | - Pin-Wen Huang
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
| | - Anna A Kirsanova
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation
| | - Ivan V Ananyev
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Avilova St. 28, Moscow 119991, Russian Federation
| | - Tsagana B Sumyanova
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation
| | - Anastasia V Kharcheva
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation.,Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory 1/2, Moscow 119991, Russian Federation
| | - Evgenii Yu Khvorostinin
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation
| | - Vladimir G Petrov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation
| | - Wei-Qun Shi
- Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
| | - Stepan N Kalmykov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation
| | - Nataliya E Borisova
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation.,A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Avilova St. 28, Moscow 119991, Russian Federation
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19
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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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20
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Xu L, Hao Y, Yang X, Wang Z, Xu C, Borisova NE, Sun M, Zhang X, Lei L, Xiao C. Comparative Investigation into the Complexation and Extraction Properties of Tridentate and Tetradentate Phosphine Oxide-Functionalized 1,10-Phenanthroline Ligands toward Lanthanides and Actinides. Chemistry 2021; 27:10717-10730. [PMID: 34002918 DOI: 10.1002/chem.202101224] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Indexed: 11/06/2022]
Abstract
Two new phosphine oxide-functionalized 1,10-phenanthroline ligands, tetradentate 2,9-bis(butylphenylphosphine oxide)-1,10-phenanthroline (BuPh-BPPhen, L1 ) and tridentate 2-(butylphenylphosphine oxide)-1,10-phenanthroline (BuPh-MPPhen, L2 ), were synthesized and studied comparatively for their coordination with trivalent actinides and lanthanides. The complexation mechanisms of these two ligands toward trivalent f-block elements were thoroughly elucidated by NMR spectroscopy, UV/vis spectrophotometry, fluorescence spectrometry, single-crystal X-ray diffraction, solvent extraction, and theoretical calculation methods. NMR titration results demonstrated that 1 : 1 and 1 : 2 (metal to ligand) lanthanides complexes formed for L1 , whereas 1 : 1, 1 : 2 and 1 : 3 lanthanide complexes formed for L2 in methanol. The formation of these species was validated by fluorescence spectrometry, and the corresponding stability constants for the complexes of NdIII with L1 and L2 were determined by using UV/vis spectrophotometry. Structures of the 10-coordinated 1 : 1-type complexes of EuL1 (NO3 )3 and [EuL2 (NO3 )3 (H2 O)] Et2 O in the solid state were characterized by X-ray crystallography. In solvent-extraction experiments, L1 exhibited extremely strong extraction ability for both AmIII and EuIII , whereas L2 showed nearly no extraction toward AmIII or EuIII due to its high hydrophilicity. Finally, the structures and bonding natures of the complex species formed between AmIII /EuIII and L1 /L2 were analyzed in DFT calculations.
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Affiliation(s)
- Lei Xu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Yuxun Hao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Xiao Yang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Zhipeng Wang
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P. R. China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P. R. China
| | - Nataliya E Borisova
- Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, GSP-1, 119991, Moscow, Russian Federation
| | - Mingze Sun
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Xingwang Zhang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Lecheng Lei
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Chengliang Xiao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
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21
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Liu Y, Wang CZ, Wu QY, Lan JH, Chai ZF, Liu Q, Shi WQ. Theoretical Insights into Transplutonium Element Separation with Electronically Modulated Phenanthroline-Derived Bis-Triazine Ligands. Inorg Chem 2021; 60:10267-10279. [PMID: 34232623 DOI: 10.1021/acs.inorgchem.1c00668] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In the process of spent fuel reprocessing, it is highly difficult to extract transplutonium elements from adjacent actinides. A deep understanding of the electronic structure of transplutonium complexes is essential for development of steady ligands for in-group separation of transplutonium actinides. In this work, we have systematically explored the potential in-group separation ability of transplutonium elements of typical quadridentate N-donor ligands (phenanthroline-derived bis-triazine, BTPhen derivatives) through quasi-relativistic density functional theory (DFT). Our calculations demonstrate that ligands with electron-donating groups have stronger coordination abilities, and the substitutions of Br and phenol at the 4-position of the 1,10-phenanthroline have a higher effect on the ligand than those at the 5-position. Bonding analysis indicates that the covalent interaction of An3+ complexes becomes stronger from Am to Cf apart from Cm, which is because the energy of the 5f orbital gradually decreases and becomes energy-degenerate with the 2p orbitals of ligands. The most negative values of binding energies indicate the higher stability of Cf3+ complexes, in line with the larger covalency in the Cf-L bonds compared with An-L (An = Am, Cm, Bk). In addition, electron-donating group phenol can enhance the covalent interaction between ligands and heavy actinides. Consequently, the extraction ability of ligands with electron-donating substituents for heavy actinides is generally stronger than other ligands. Nevertheless, these ligands exhibit diverse separation abilities to in-group actinide recovery. Therefore, the enhancement of covalency does not necessarily lead to the improvement of separation ability, which may be caused by different extraction abilities. Compared with the tetradentate N, O-donor ligands (2,9-diamide-1,10-phenanthrolinel, DAPhen derivatives), species with BTPhen ligands display stronger covalent interaction and higher extraction capacity. In terms of in-group separation ability, the BTPhen ligands seem to have advantages in separation of californium from curium, while the DAPhen ligands possess stronger abilities to separate americium from curium. These results may afford some afflatus for the development of effective agents for in-group separation of transplutonium elements.
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Affiliation(s)
- Yang Liu
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, 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
| | - Qi Liu
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, 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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22
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Niu K, Yang F, Gaudin T, Ma H, Fang W. Theoretical Study of Effects of Solvents, Ligands, and Anions on Separation of Trivalent Lanthanides and Actinides. Inorg Chem 2021; 60:9552-9562. [PMID: 34161729 DOI: 10.1021/acs.inorgchem.1c00657] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Due to its associated low CO2 emissions, nuclear energy production is rapidly growing. In this context, the treatment of high-level liquid waste (HLLW) of nuclear plants is of high concern to both scientific and industrial communities. Specifically, the separation of An(III) and Ln(III) cations when processing nuclear fuel is a vitally important, yet challenging, step within HLLW because An(III) and Ln(III) have similar chemical properties in solution. To guide the choice of relevant ligands, anions, and solvents for this separation step, in this work, we calculate and compare the free energy of formation of different Am(III) and Eu(III) complexes (which are typical and important An(III) and Ln(III) cation examples), involving two different ligands and three different counter ions in four different solvents. Based on our calculations, we predict that the chosen solvent is a key factor in the extraction of Am(III) and Eu(III) in treatment of HLLW. This study supports a systematic, computation-assisted screening of solvents and extractive ligands with counter anions as a proficient method to optimize the separation of Ln(III) and An(III).
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Affiliation(s)
- Ke Niu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Feng Yang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Théophile Gaudin
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Haibo Ma
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.,Jiangsu Key Laboratory of Vehicle Emissions Control, Nanjing University, Nanjing 210023, China
| | - Weihai Fang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.,Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education, Department of Chemistry, Beijing Normal University, Beijing 100875, China
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23
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Yang XF, Ren P, Yang Q, Geng JS, Zhang JY, Yuan LY, Tang HB, Chai ZF, Shi WQ. Strong Periodic Tendency of Trivalent Lanthanides Coordinated with a Phenanthroline-Based Ligand: Cascade Countercurrent Extraction, Spectroscopy, and Crystallography. Inorg Chem 2021; 60:9745-9756. [PMID: 34115461 DOI: 10.1021/acs.inorgchem.1c01035] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Phenanthroline-diamide ligands have been reported in the selective separation of actinides over Eu(III); on the contrary, relevant basic coordination chemistry studies are still limited, and extraction under actual application conditions is rarely involved. In this work, N,N'-diethyl-N,N'-ditolyl-2,9-diamide-1,10-phenanthroline [Et-Tol-DAPhen (L)] was applied to explore the coordination performance of lanthanides in simulative high-level liquid waste. For the first time, cascade countercurrent extraction was conducted with Et-Tol-DAPhen as the extractant, which reveals the periodic tendency of the extraction efficiency of lanthanides to decrease gradually as the atomic number increases. Comparison of elements with similar radii verifies the hypothesis that the increase in the atomic number leads to a decrease in the ionic radius, thus reducing the coordination and extraction capacity of ligands. Slope analysis, electrospray ionization mass spectrometry, and ultraviolet-visible titration results show that the ligand forms 1:1 and 1:2 complexes with lanthanides and the coordination ability follows the tendency of extraction efficiency, and the first crystal structures of Lns(III) with a phenanthroline-diamide ligand, i.e., [LaL(NO3)3(H2O)] and [LaL2(NO3)2][(NO3)], were obtained, which confirms the conclusions described above. This work promises to enhance our comprehension of the chemical properties of Lns(III) and offer new clues for the design and synthesis of novel separation ligands.
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Affiliation(s)
- Xiao-Fan Yang
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,Department of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, China
| | - Peng Ren
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,School of Nuclear Science and Engineering, East China University of Technology, Nanchang, Jiangxi 330013, China
| | - Qi Yang
- Department of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, China
| | - Jun-Shan Geng
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Jin-Yu Zhang
- Department of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, China
| | - Li-Yong Yuan
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Hong-Bin Tang
- Department of Radiochemistry, China Institute of Atomic Energy, Beijing 102413, China
| | - Zhi-Fang Chai
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,Engineer Laboratory of Advanced Energy Materials, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, China
| | - Wei-Qun Shi
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
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