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Yang X, Cui M, Su R, Huang R. The Preparation of a Polyamidoxime-Phosphorylated Cellulose Nanofibrils Composite Aerogel for the Selective Extraction of Uranium from Seawater. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1297. [PMID: 39120402 PMCID: PMC11313947 DOI: 10.3390/nano14151297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2024] [Revised: 07/31/2024] [Accepted: 07/31/2024] [Indexed: 08/10/2024]
Abstract
Uranium is the most important fuel for nuclear power operations, and the safe supply of its resources is the key to the development of nuclear power in China. Because of the complex seawater environment and extremely low uranium concentration, extracting uranium from natural seawater poses a significant challenge. In this study, a polyamidoxime-phosphorylated cellulose nanofibril composite aerogel was prepared as an adsorbent for uranium extraction from seawater. An adsorption kinetics test, equilibrium adsorption isotherm model fitting, an adsorption-desorption cycle test, and a selectivity test were carried out to evaluate the adsorption performance of the composite aerogel for uranium extraction. The adsorption capacities for the initial concentrations of 4 and 8 ppm in uranium-spiked pure water were 96.9 and 204.3 mg-U/g-Ads, respectively. The equilibrium uranium adsorption capacities of uranium-spiked simulated seawater were 38.9 and 51.7 mg-U/g-Ads, respectively. The distribution coefficient KD of uranium was calculated to be 2.5 × 107 mL/g. The results show that the polyamidoxime-phosphorylated cellulose nanofiber composite aerogels prepared in this study have the advantages of low cost and high uranium selectivity for uranium extraction from seawater.
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Affiliation(s)
- Xiaoying Yang
- Tianjin Key Laboratory for Marine Environmental Research and Service, School of Marine Science and Technology, Tianjin University, Tianjin 300072, China; (X.Y.)
| | - Mei Cui
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Rongxin Su
- Tianjin Key Laboratory for Marine Environmental Research and Service, School of Marine Science and Technology, Tianjin University, Tianjin 300072, China; (X.Y.)
- State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science and Desalination Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Renliang Huang
- Tianjin Key Laboratory for Marine Environmental Research and Service, School of Marine Science and Technology, Tianjin University, Tianjin 300072, China; (X.Y.)
- Tianjin Sustainable Novel Materials Co., Ltd., Tianjin 300192, China
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2
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Mason MM, Smith C, Vasiliu M, Carrick JD, Dixon DA. Prediction of An(III)/Ln(III) Separation by 1,2,4-Triazinylpyridine Derivatives. J Phys Chem A 2021; 125:6529-6542. [PMID: 34286991 DOI: 10.1021/acs.jpca.1c01854] [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
The effect of frustrated Lewis donors on metal selectivity between actinides and lanthanides was studied using a series of novel organic ligands. Structures and thermodynamic energies were predicted in the gas phase, in water, and in butanol using 9-coordinate, explicitly solvated (H2O) Eu, Gd, Am, and Cm in the +III oxidation state as reactants in the formation of complexes with 2-(6-[1,2,4]-triazin-3-yl-pyridin-2-yl)-1H-indole (Core 1), 3-[6-(2H-pyrazol-3-yl)pyridin-2-yl]-1,2,4-triazine (Core 2), and several derivatives. These complexations were studied using density functional theory (DFT) incorporating scalar relativistic effects on the actinides and lanthanides using a small core pseudopotential and corresponding basis set. A self-consistent reaction field approach was used to model the effect of water and butanol as solvents. Coordination preferences and metal selectivity are predicted for each ligand. Several ligands are predicted to have a high degree of selectivity, particularly when a low ionization potential in the ligand permits charge transfer to Eu(III), reducing it to Eu(II) and creating a half-filled f7 shell. Reasonable separation is predicted between Cm(III) and Gd(III) with Core 1 ligands, possibly due to ligand donor frustration. This separation is largely absent from Core 2 ligands, which are predicted to lose their frustration due to proton transfer from the 2N to the 3N position of the pyrazole component of the ligands via tautomerization.
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Affiliation(s)
- Marcos M Mason
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Caris Smith
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Jesse D Carrick
- Department of Chemistry, Tennessee Technological University, 803 Stadium Drive, Cookeville, Tennessee 38505-0001, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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3
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Does uranyl-TBP complex formation happen at the aqueous-organic interface? Revelation by molecular dynamics simulations. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115621] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Coordination behavior of uranyl with PDAM derivatives in solution: Combined study with ESI-MS and DFT. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112287] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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5
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Interactions of phosphorylated cyclohexapeptides with uranyl: insights from experiments and theoretical calculations. J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06697-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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6
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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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7
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Lu G, Haes AJ, Forbes TZ. Detection and identification of solids, surfaces, and solutions of uranium using vibrational spectroscopy. Coord Chem Rev 2018; 374:314-344. [PMID: 30713345 PMCID: PMC6358285 DOI: 10.1016/j.ccr.2018.07.010] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The purpose of this review is to provide an overview of uranium speciation using vibrational spectroscopy methods including Raman and IR. Uranium is a naturally occurring, radioactive element that is utilized in the nuclear energy and national security sectors. Fundamental uranium chemistry is also an active area of investigation due to ongoing questions regarding the participation of 5f orbitals in bonding, variation in oxidation states and coordination environments, and unique chemical and physical properties. Importantly, uranium speciation affects fate and transportation in the environment, influences bioavailability and toxicity to human health, controls separation processes for nuclear waste, and impacts isotopic partitioning and geochronological dating. This review article provides a thorough discussion of the vibrational modes for U(IV), U(V), and U(VI) and applications of infrared absorption and Raman scattering spectroscopies in the identification and detection of both naturally occurring and synthetic uranium species in solid and solution states. The vibrational frequencies of the uranyl moiety, including both symmetric and asymmetric stretches are sensitive to the coordinating ligands and used to identify individual species in water, organic solvents, and ionic liquids or on the surface of materials. Additionally, vibrational spectroscopy allows for the in situ detection and real-time monitoring of chemical reactions involving uranium. Finally, techniques to enhance uranium species signals with vibrational modes are discussed to expand the application of vibrational spectroscopy to biological, environmental, inorganic, and materials scientists and engineers.
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Affiliation(s)
- Grace Lu
- Department of Chemistry, University of Iowa, Iowa City, IA 52242, United States
| | - Amanda J. Haes
- Department of Chemistry, University of Iowa, Iowa City, IA 52242, United States
| | - Tori Z. Forbes
- Department of Chemistry, University of Iowa, Iowa City, IA 52242, United States
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8
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Kong XH, Wu QY, Wang CZ, Lan JH, Chai ZF, Nie CM, Shi WQ. Insight into the Extraction Mechanism of Americium(III) over Europium(III) with Pyridylpyrazole: A Relativistic Quantum Chemistry Study. J Phys Chem A 2018; 122:4499-4507. [DOI: 10.1021/acs.jpca.8b00177] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiang-He Kong
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
- School of Nuclear Resources Engineering, University of South China, Hengyang 421001, China
| | - Qun-Yan Wu
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Cong-Zhi Wang
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Jian-Hui Lan
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhi-Fang Chai
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
- 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
| | - Chang-Ming Nie
- School of Nuclear Resources Engineering, University of South China, Hengyang 421001, China
| | - Wei-Qun Shi
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China
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9
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Zhang L, Qie M, Su J, Zhang S, Zhou J, Li J, Wang Y, Yang S, Wang S, Li J, Wu G, Wang JQ. Tris-amidoximate uranyl complexes via η 2 binding mode coordinated in aqueous solution shown by X-ray absorption spectroscopy and density functional theory methods. JOURNAL OF SYNCHROTRON RADIATION 2018; 25:514-522. [PMID: 29488931 DOI: 10.1107/s160057751800067x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 01/10/2018] [Indexed: 06/08/2023]
Abstract
The present study sheds some light on the long-standing debate concerning the coordination properties between uranyl ions and the amidoxime ligand, which is a key ingredient for achieving efficient extraction of uranium. Using X-ray absorption fine structure combined with theoretical simulation methods, the binding mode and bonding nature of a uranyl-amidoxime complex in aqueous solution were determined for the first time. The results show that in a highly concentrated amidoxime solution the preferred binding mode between UO22+ and the amidoxime ligand is η2 coordination with tris-amidoximate species. In such a uranyl-amidoximate complex with η2 binding motif, strong covalent interaction and orbital hybridization between U 5f/6d and (N, O) 2p should be responsible for the excellent binding ability of the amidoximate ligand to uranyl. The study was performed directly in aqueous solution to avoid the possible binding mode differences caused by crystallization of a single-crystal sample. This work also is an example of the simultaneous study of local structure and electronic structure in solution systems using combined diagnostic tools.
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Affiliation(s)
- Linjuan Zhang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Meiying Qie
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Jing Su
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Shuo Zhang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Jing Zhou
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Jiong Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Yu Wang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Shitong Yang
- School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou 215123, People's Republic of China
| | - Shuao Wang
- School for Radiological and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou 215123, People's Republic of China
| | - Jingye Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Guozhong Wu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
| | - Jian Qiang Wang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China
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10
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Ali SM. Enhanced free energy of extraction of Eu 3+ and Am 3+ ions towards diglycolamide appended calix[4]arene: insights from DFT-D3 and COSMO-RS solvation models. Dalton Trans 2017; 46:10886-10898. [PMID: 28766636 DOI: 10.1039/c7dt01949a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Density functional theory in conjunction with COSMO and COSMO-RS solvation models employing dispersion correction (DFT-D3) has been applied to gain an insight into the complexation of Eu3+/Am3+ with diglycolamide (DGA) and calix[4]arene appended diglycolamide (CAL4DGA) in ionic liquids by studying structures, energetics, thermodynamics and population analysis. The calculated Gibbs free energy for both Eu3+ and Am3+ ions with DGA was found to be smaller than that with CAL4DGA. The entropy of complexation was also found to be reduced to a large extent with DGA compared to complexation with CAL4DGA. The solution phase free energy was found to be negative and was higher for Eu3+ ion. The entropy of complexation was not only found to be further reduced but also became negative in the case of DGA alone. Though the entropy was found to be negative it could not outweigh the high negative enthalpic contribution. The same trend was observed in the solution where the free energy of extraction, ΔG, for Eu3+ ions was shown to be higher than that for Am3+ ions towards free DGA. But the values of ΔG and ΔΔG(= ΔGEu-ΔGAm) were found to be much higher with CAL4DGA (-12.58 kcal mol-1) in the presence of nitrate ions compared to DGA (-1.69 kcal mol-1) due to enhanced electronic interaction and positive entropic contribution. Furthermore, both the COSMO and COSMO-RS models predict very close values of ΔΔΔG (= ΔΔGCAL4DGA - ΔΔGnDGA), indicating that both solvation models could be applied for evaluating the metal ion selectivity. The value of the reaction free energy was found to be higher after dispersion correction. The charge on the Eu and Am atoms for the complexes with DGA and CAL4DGA indicates the charge-dipole type interaction leading to strong binding energy. The present theoretical results support the experimental findings and thus might be of importance in the design of functionalized ligands.
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Affiliation(s)
- Sk Musharaf Ali
- Chemical Engineering Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India.
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11
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Browne KP, Maerzke KA, Travia NE, Morris DE, Scott BL, Henson NJ, Yang P, Kiplinger JL, Veauthier JM. Synthesis, Characterization, and Density Functional Theory Analysis of Uranium and Thorium Complexes Containing Nitrogen-Rich 5-Methyltetrazolate Ligands. Inorg Chem 2016; 55:4941-50. [DOI: 10.1021/acs.inorgchem.6b00492] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kevin P. Browne
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Katie A. Maerzke
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Nicholas E. Travia
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - David E. Morris
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Brian L. Scott
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Neil J. Henson
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Ping Yang
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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12
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South C, Shee A, Mukherjee D, Wilson AK, Saue T. 4-Component relativistic calculations of L3ionization and excitations for the isoelectronic species UO22+, OUN+and UN2. Phys Chem Chem Phys 2016; 18:21010-23. [DOI: 10.1039/c6cp00262e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
4-Component relativistic calculations explore uranium 2p3/2ionization and excitation in the isoelectronic series UO22+, OUN+and UN2.
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Affiliation(s)
- Christopher South
- Department of Chemistry and Center for Advanced Scientific Computation and Modeling (CASCaM)
- University of North Texas
- Denton
- USA
| | - Avijit Shee
- Laboratoire de Chimie et Physique Quantiques
- UMR 5626 CNRS – Université Toulouse III-Paul Sabatier
- F-31062 Toulouse
- France
| | - Debashis Mukherjee
- Raman Center for Atomic
- Molecular and Optical Sciences
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Angela K. Wilson
- Department of Chemistry and Center for Advanced Scientific Computation and Modeling (CASCaM)
- University of North Texas
- Denton
- USA
- Department of Chemistry
| | - Trond Saue
- Laboratoire de Chimie et Physique Quantiques
- UMR 5626 CNRS – Université Toulouse III-Paul Sabatier
- F-31062 Toulouse
- France
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13
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Wu QY, Wang CZ, Lan JH, Chai ZF, Shi WQ. Theoretical insight into the binding affinity enhancement of serine with the uranyl ion through phosphorylation. RSC Adv 2016. [DOI: 10.1039/c6ra14906e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Various type complexes of uranyl ion with serine and phosphoserine were investigated which showed phosphorylation induced binding affinity enhancement of serine with the uranyl ion.
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Affiliation(s)
- Qun-Yan Wu
- 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
- China
| | - Cong-Zhi Wang
- 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
- China
| | - 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
- 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
- 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
- China
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14
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Wu QY, Zhai FW, Liu Y, Yuan LY, Chai ZF, Shi WQ. Interactions between uranium(vi) and phosphopeptide: experimental and theoretical investigations. Dalton Trans 2016; 45:14988-97. [DOI: 10.1039/c6dt03009b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A phosphorylated pentapeptide (WpTPpTW, P1) motif was designed as a model to mimic possible U(vi) coordination sites of genuine phosphorylated proteins.
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Affiliation(s)
- Qun-Yan Wu
- 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
| | - Fu-Wan Zhai
- 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
| | - Yang Liu
- 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
| | - Li-Yong Yuan
- 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
| | - 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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15
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Vukovic S, Hay BP, Bryantsev VS. Predicting Stability Constants for Uranyl Complexes Using Density Functional Theory. Inorg Chem 2015; 54:3995-4001. [DOI: 10.1021/acs.inorgchem.5b00264] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sinisa Vukovic
- Oak Ridge National Laboratory, Chemical Sciences Division, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831-6119, United States
| | - Benjamin P. Hay
- Oak Ridge National Laboratory, Chemical Sciences Division, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831-6119, United States
| | - Vyacheslav S. Bryantsev
- Oak Ridge National Laboratory, Chemical Sciences Division, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831-6119, United States
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16
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Jackson VE, Felmy AR, Dixon DA. Prediction of the pKa's of aqueous metal ion +2 complexes. J Phys Chem A 2015; 119:2926-39. [PMID: 25721568 DOI: 10.1021/jp5118272] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Aqueous metal ions play an important role in many areas of chemistry. The acidities of [Be(H2O)4](2+), [M(H2O)6](2+), M = Mg(2+), Mn(2+), Fe(2+), Co(2+), Ni(2+), Cu(2+), Zn(2+), Cd(2+), and Hg(2+), and [M(H2O)n](2+), M = Ca(2+) and Sr(2+), n = 7 and 8, complexes have been predicted using density functional theory, second-order Møller-Plesset perturbation theory (MP2), and coupled cluster CCSD(T) theory in the gas phase. pKa's in aqueous solution were predicted by using self-consistent reaction field (SCRF) calculations with different solvation models. The most common binding motif of the majority of the metal +2 complexes is coordination number (CN) 6, with each hexaaquo cluster having reasonably high symmetry for the best arrangement of the water molecules in the first solvation shell. Be(2+) is tetracoordinated, but a second solvation shell of 8 waters is needed to predict the pKa. The Ca(2+) and Sr(2+) aquo clusters have a coordination number of 7 or 8 as found in terms of the energy of the reaction M(H2O)7(2+) + H2O → M(H2O)8(2+) and the pKa values. The calculated geometries are in reasonable agreement with experiment. The SCRF calculations with the conductor-like screening model (COSMO), and the conductor polarized continuum model (CPCM) using COSMO-RS radii, consistently agree best with experiment at the MP2/aug-cc-pVDZ and CCSD(T)/aug-cc-pVDZ levels of theory. The CCSD(T) level provides the most accurate pKa's, and the MP2 level also provides reliable predictions. Our predictions were used to elucidate the properties of metal +2 ion complexes. The pKa predictions provide confirmation of the size of the first solvation shell sizes. The calculations show that it is still difficult to predict pKa's using this cluster/implicit solvent approach to better than 1 pKa unit.
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Affiliation(s)
- Virgil E Jackson
- †Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Andrew R Felmy
- ‡Fundamental Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - David A Dixon
- †Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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17
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Density functional theoretical analysis of structure, bonding, interaction and thermodynamic selectivity of hexavalent uranium (UO2 2+) and tetravalent plutonium (Pu4+) ion complexes of tetramethyl diglycolamide (TMDGA). Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1641-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Verma PK, Kumari N, Pathak PN, Sadhu B, Sundararajan M, Aswal VK, Mohapatra PK. Investigations on preferential Pu(IV) extraction over U(VI) by N,N-dihexyloctanamide versus tri-n-butyl phosphate: evidence through small angle neutron scattering and DFT studies. J Phys Chem A 2014; 118:3996-4004. [PMID: 24815040 DOI: 10.1021/jp503037q] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Straight chain amide N,N-dihexyloctanamide (DHOA) has been found to be a promising alternative extractant to tri-n-butyl phosphate (TBP) for the reprocessing of irradiated uranium- and thorium-based fuels. Unlike TBP, DHOA displays preferential extraction of Pu(IV) over U(VI) at higher acidities (≥3 M HNO3) and poor extraction at lower acidities. Density functional theory (DFT) based calculations have been carried out on the structures and relative binding energies of U(VI) and Pu(IV) with the extractant molecules. These calculations suggest that the differential hardness of the two extractants is responsible for the preferential binding/complexation of TBP to uranyl, whereas the softer DHOA and the bulky nature of the extractant lead to stronger binding/complexation of DHOA to Pu(IV). In conjunction with quantum chemical calculations, small angle neutron scattering (SANS) measurements have also been performed for understanding the stoichiometry of the complex formed that leads to relatively lower extraction of Th(IV) (a model for Pu(IV)) as compared to U(VI) using DHOA and TBP as the extractants. The combined experimental and theoretical studies helped us to understand the superior complexation/extraction behavior of Pu(IV) over U(VI) with DHOA.
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Affiliation(s)
- P K Verma
- Radiochemistry Division, ‡Radiation Safety Systems Division, §Theoretical Chemistry Section, and ∥Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India
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