1
|
Dutra FR, Vasiliu M, Gomez AN, Xia D, Dixon DA. Prediction of Redox Potentials for U, Np, Pu, and Am in Aqueous Solution. J Phys Chem A 2024; 128:5612-5626. [PMID: 38959054 DOI: 10.1021/acs.jpca.4c02902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
The redox properties of the actinides in aqueous solution are important for fuel production/reprocessing and understanding the environmental impact of nuclear waste. The redox potentials for U, Np, Pu, and Am in oxidation states from 0 up to VII (as appropriate) in aqueous solutions have been predicted at the density functional theory level with the B3LYP functional, Stuttgart small core pseudopotential basis sets for the actinides, and explicit (30H2O molecules)/implicit treatment of the aqueous solvent using the self-consistent reaction field COSMO and SMD approaches for the implicit solvation. The predictions of the structural parameters of clusters incorporating first and second solvation shells are consistent with the available experimental data. Our results are typically within 0.2 V of the available experimental data using two explicit solvation shells with an implicit solvent model. The use of the PW91 functional substantially improved the prediction of the Pu(VI/V) redox couple. The redox couples for An(VI/IV) and An(V/IV) which involve the addition of protons and removal of the actinyl oxygens led to slightly larger differences from an experiment. The An(IV/0) and An(III/0) couples were reliably predicted with our approach. Predictions of the unknown An(II/I) redox potentials were negative, consistent with expectations, and predictions for unknown An(VII/VI), An(III/II), and An(II/0) redox couples improve prior estimates.
Collapse
Affiliation(s)
- Felipe R Dutra
- Instituto de Química, Universidade Estadual de Campinas, Barão Geraldo, P.O. Box 6154, Campinas 13083-970, São Paulo, Brazil
- 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
| | - Amber N Gomez
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Donna Xia
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| |
Collapse
|
2
|
Sundararajan M. Redox Potentials of Uranyl Ions in Macrocyclic Complexes: Quantifying the Role of Counter-Ions. ACS OMEGA 2023; 8:18041-18046. [PMID: 37251172 PMCID: PMC10210231 DOI: 10.1021/acsomega.3c01244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 04/27/2023] [Indexed: 05/31/2023]
Abstract
Several uranyl ions strapped with Schiff-base ligands in the presence of redox-innocent metal ions are synthesized, and their reduction potentials are recently estimated. The change in Lewis acidity of the redox-innocent metal ions contributes to ∼60 mV/pKa unit quantified which is intriguing. Upon increasing the Lewis acidity of metal ions, the number of triflate molecules found near the metal ions also increases whose contributions toward the redox potentials remain poorly understood and not quantified until now. Most importantly, to ease the computational burden, triflate anions are often neglected in quantum chemical models due to their larger size and weak coordination to metal ions. Herein, we have quantified and dissected the individual contributions that arise alone from Lewis acid metal ions and from triflate anions with electronic structure calculations. The triflate anion contributions are large, in particular, for divalent and trivalent anions that cannot be neglected. It was presumed to be innocent, but we here show that they can contribute more than 50% to the predicted redox potentials, suggesting that their vital role in the overall reduction processes cannot be neglected.
Collapse
|
3
|
Arumugam K, Burton NA. Disproportionation of the Uranyl(V) Coordination Complexes in Aqueous Solution through Outer-Sphere Electron Transfer. Inorg Chem 2021; 60:18832-18842. [PMID: 34847326 DOI: 10.1021/acs.inorgchem.1c02575] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Among the linear actinyl(VI/V) cations, the uranyl(V) species are particularly intriguing because they are unstable and exhibit a unique behavior to undergo H+ promoted disproportionation in aqueous solution and form stable uranyl(VI) and U(IV) complexes. This study uses density functional theory (DFT) combined with the conductor-like polarizable continuum model approach to investigate [UO2]2+/+ to [UIVO2] reduction free energies (RFEs) and explores the stability of uranyl(V) complexes in aqueous solution through computing disproportionation free energies (DFEs) for an outer-sphere electron transfer process. In addition to the aqua complex (U1), another three commonly encountered ligands such as chloride (U2), acetate (U3), and carbonate (U4) in aqueous environmental conditions are taken into account. For the U1 complex, the computed 1e- (V/IV) and 2e- (VI/IV) RFEs are in good agreement with experiments. The computed DFEs reveal that the presence of H+ is imperative for the disproportionation to take place. Although the presence of the alkali cations favors the disproportionation to some extent, they cannot fully make the reaction thermodynamically feasible. For the anionic complexes, the high negative charge does not allow for the formation of a cation-cation encounter complex due to Coulombic repulsion. Furthermore, an additional factor is the ligand exchange reaction which is also an energy-demanding step. Therefore, the current study examined the Kern-Orlemann mechanism and our results validate the mechanism based on DFT computed DFEs and propose that for the anionic complexes, an outer-sphere electron transfer is highly probable and our computed protonation free energies further support this claim.
Collapse
Affiliation(s)
- Krishnamoorthy Arumugam
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Neil A Burton
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| |
Collapse
|
4
|
Joshi M, Ghanty TK. Lanthanide and actinide doped B 12H 122- and Al 12H 122- clusters: new magnetic superatoms with f-block elements. Phys Chem Chem Phys 2019; 21:23720-23732. [PMID: 31633129 DOI: 10.1039/c9cp04333k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In recent years, actinide containing clusters have attracted immense attention because of the distinctive bonding properties of their 5f and 6d electrons. In this context, in the present work, we have studied the isoelectronic series of actinide (An = Np+, Pu2+, Am3+) doped B12H122- and Al12H122- clusters using density functional theory (DFT). Similarly, corresponding isoelectronic lanthanide (Ln = Pm+, Sm2+, Eu3+) doped clusters are also investigated using DFT for comparison. Both exohedral and endohedral metal doped Al12H122- clusters are investigated in various possible spin states, whereas for B12H122- only exohedral metal doped clusters are studied due to its smaller cage diameter. Among all the metal doped clusters, the exohedral metal doped B12H122- and Al12H122- clusters in a septet spin state with retained high spin population on the doped actinide ion, are the most stable, indicating that all these doped clusters are magnetic in nature. The high stability of exohedral clusters is due to small steric repulsion as compared to that in the corresponding endohedral clusters. A prominent charge transfer from cage to metal ion is responsible for the strong interaction of the doped metal ion with the cage atoms. The studied Ln@B12H122- (Ln@Al12H122-) and An@B12H122- (An@Al12H122-) clusters are not only thermodynamically stable, but also kinetically stable. Metal ion encapsulated endohedral Al12H122- clusters are found to satisfy the 32-electron principle corresponding to the completely filled s, p, d and f shells of the central f-block atom. Theoretical predictions of these lanthanide and actinide doped stable B12H122- and Al12H122- clusters could encourage experimentalists for the preparation of these metal-doped clusters. Thus, the present work offers borane and alane clusters as new hosts for encapsulating radioactive actinides. Furthermore, various functional derivatives of these actinide doped B12H122- clusters may find applications in the field of radiation medicine.
Collapse
Affiliation(s)
- Meenakshi Joshi
- Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Mumbai 400085, India.
| | | |
Collapse
|
5
|
Chandrasekar A, Ghanty TK, Brahmmananda Rao CVS, Sundararajan M, Sivaraman N. Strong influence of weak hydrogen bonding on actinide-phosphonate complexation: accurate predictions from DFT followed by experimental validation. Phys Chem Chem Phys 2019; 21:5566-5577. [PMID: 30785454 DOI: 10.1039/c9cp00479c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Among the varied classes of weak hydrogen bond, the CHO type is one of immense interest as it governs the finer structures of biological and chemical molecules, hence determining their functionalities. In the present work, this weak hydrogen bond has been shown to strongly influence the complexation behaviour of uranyl nitrate [UO2(NO3)2] with diamyl-H-phosphonate (DAHP) and its branched isomer disecamyl-H-phosphonate (DsAHP). The structures of the bare ligands and complexes have been optimized by density functional theory (DFT) calculations. Surprisingly, despite having the same chemical composition the branched UO2(NO3)2·2DsAHP complex shows a remarkably higher stability (by ∼14 kcal mol-1) compared to the UO2(NO3)2·2DAHP complex. Careful inspection of the optimized structures reveals the existence of multiple CHO hydrogen-bonding interactions between the nitrate oxygens or U[double bond, length as m-dash]O oxygens and the α-hydrogens in the alkyl chains of the ligands. Comparatively stronger such bonds are found in the UO2(NO3)2·2DsAHP complex. The binding free energies associated with the complexes are computed and favoured superior binding energetics for the more stable UO2(NO3)2·2DsAHP complex. Calculations involving diisoamyl-H-phosphonate (DiAHP) and its complexes have also been performed. Theoretical predictions are experimentally tested by carrying out the extraction of U(vi) from nitric acid media using these ligands. DAHP, DsAHP and DiAHP are synthesised, characterised by NMR and evaluated for their physicochemical properties viz. viscosity, density and aqueous solubility. It was experimentally discovered that indeed DsAHP complexation with uranyl nitrate is more favoured. H-phosphonates are generically classified as acidic extractants owing to the formation of an enol tautomer at lower acidities, hence complexing the metal ion by proton exchange. Our experiments interestingly reveal a neutral ligand characteristic for DsAHP alone which is generically an acidic extractant. Furthermore, the enol tautomer of H-phosphonates that governs their extraction profiles at low acidities is also explored by DFT and the anomalous pH dependent complexation trend of DsAHP could be successfully explained. The extractions of Pu(iv) and Th(iv) have also been carried out in addition to U(vi). Solvent extraction behaviour of Am(iii) was also studied with all three ligands; the positive binding energies computed for the Am(iii) complexation corroborate with our experimental results on the poor extraction of Am(iii).
Collapse
Affiliation(s)
- Aditi Chandrasekar
- Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu 603102, India.
| | | | | | | | | |
Collapse
|
6
|
Arumugam K, Burton NA. Density functional theory (DFT) calculations of VI/V reduction potentials of uranyl coordination complexes in non-aqueous solutions. Phys Chem Chem Phys 2019; 21:3227-3241. [PMID: 30681090 DOI: 10.1039/c8cp05412f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Of particular interest within the +6 uranium complexes is the linear uranyl(vi) cation and it forms numerous coordination complexes in solution and exhibits incongruent redox behavior depending on coordinating ligands. In this study, to determine the reduction potentials of uranyl complexes in non-aqueous solutions, a hybrid density functional theory (DFT) approach was used in which two different DFT functionals, B3LYP and M06, were applied. Bulk solvent effects were invoked through the conductor-like polarizable continuum model. The solute cavities were described with the united-atom Kohn-Sham (UAKS) cavity definition. Inside the cavity the dielectric constant matches the value of a vacuum and outside the cavity the dielectric constant value is the same as that of the solvent of interest, for example, dimethyl sulfoxide (DMSO), dimethylformamide (DMF), dichloromethane (DCM), acetonitrile and pyridine. With the help of the Nernst equation the calculated reduction potentials with respect to the ferrocene (Fc) reference electrode are converted into reduction free energies (RFEs). Uranyl complexes of organic ligands which range from mono- to hexa-dentate coordination modes were investigated in non-aqueous solutions of DMSO, DMF, DCM, acetonitrile and pyridine solutions. The effect of the spin-orbit correction and the reference electrode correction on the RFEs and various methods such as the direct method and the isodesmic reaction model were explored. Overall, our computational determination of RFEs of uranyl complexes in various non-aqueous solutions demonstrates that the RFEs can be obtained within ∼0.2 eV of experimental values.
Collapse
Affiliation(s)
- Krishnamoorthy Arumugam
- School of Chemistry, The University of Manchester, Brunswick Street, Manchester M13 9PL, UK.
| | | |
Collapse
|
7
|
Kannan S, Kumar M, Sadhu B, Jaccob M, Sundararajan M. Unusual intramolecular CH⋯O hydrogen bonding interaction between a sterically bulky amide and uranyl oxygen. Dalton Trans 2017; 46:16939-16946. [DOI: 10.1039/c7dt02760e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unusual intramolecular CH⋯O hydrogen bonding interaction between a sterically bulky amide and uranyl oxygen is found to selectively extract uranyl.
Collapse
Affiliation(s)
| | - Mukesh Kumar
- Solid State Physics Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - Biswajit Sadhu
- Radiation Safety and Systems Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | | | - Mahesh Sundararajan
- Theoretical Chemistry Section
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| |
Collapse
|
8
|
Gorden AEV, McKee ML. Computational Study of Reduction Potentials of Th4+ Compounds and Hydrolysis of ThO2(H2O)n, n = 1, 2, 4. J Phys Chem A 2016; 120:8169-8183. [DOI: 10.1021/acs.jpca.6b08472] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anne E. V. Gorden
- Department
of Chemistry and
Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Michael L. McKee
- Department
of Chemistry and
Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| |
Collapse
|
9
|
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]
|
10
|
Sieffert N, Wipff G. Uranyl extraction by N,N-dialkylamide ligands studied using static and dynamic DFT simulations. Dalton Trans 2015; 44:2623-38. [DOI: 10.1039/c4dt02443e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DFT/MM-MD simulations highlight the structure and dynamics of mixed uranyl/nitrato/monoamides (L) complexes at an “oil”/water interface.
Collapse
Affiliation(s)
| | - Georges Wipff
- UMR 7177 CNRS
- Laboratoire MSM
- Institut de Chimie
- Université de Strasbourg
- 67000 Strasbourg
| |
Collapse
|
11
|
Odoh SO, Bondarevsky GD, Karpus J, Cui Q, He C, Spezia R, Gagliardi L. UO22+ Uptake by Proteins: Understanding the Binding Features of the Super Uranyl Binding Protein and Design of a Protein with Higher Affinity. J Am Chem Soc 2014; 136:17484-94. [DOI: 10.1021/ja5087563] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Samuel O. Odoh
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Gary D. Bondarevsky
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Jason Karpus
- Department
of Chemistry and Institute of Biophysical Dynamics, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States
| | - Qiang Cui
- Department
of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Chuan He
- Department
of Chemistry and Institute of Biophysical Dynamics, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, United States
| | - Riccardo Spezia
- CNRS,
Laboratoire Analyse et Modélisation pour la Biologie et l’Environnement,
UMR 8587, Université d’Evry-Val-d’Essonne, 91025, Every Cedex, France
| | - Laura Gagliardi
- Department
of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| |
Collapse
|
12
|
Šulka M, Cantrel L, Vallet V. Theoretical study of plutonium(IV) complexes formed within the PUREX process: a proposal of a plutonium surrogate in fire conditions. J Phys Chem A 2014; 118:10073-80. [PMID: 25290588 DOI: 10.1021/jp507684f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We present a relativistic quantum chemical study to determine the best surrogate for plutonium(IV) to be used in experimental investigations of the behavior of plutonium-nitrate-TBP in fire conditions that might occur in the nuclear fuel refining process known as PUREX. In this study geometries and stabilities of Pu(NO3)6(2-) and Pu(NO3)4(TBP)2 complexes were compared to that of equivalent complexes of selected elements from the lanthanide and actinide series (Ce, Th, U) chosen on the basis of similar ionic radii and stability as tetravalent species. PBE and PBE0 DFT functionals have proven to be sufficient and affordable for qualitative studies, performing as good as the wave function based correlated method MP2. On the basis of our results, cerium(IV) appears to be a good surrogate for plutonium(IV).
Collapse
Affiliation(s)
- Martin Šulka
- PSN-RES, SAG, LETR, Institut de Radioprotection et de Sûreté Nucléaire (IRSN) , St Paul Lez Durance 13115, France
| | | | | |
Collapse
|
13
|
Marenich AV, Ho J, Coote ML, Cramer CJ, Truhlar DG. Computational electrochemistry: prediction of liquid-phase reduction potentials. Phys Chem Chem Phys 2014; 16:15068-106. [PMID: 24958074 DOI: 10.1039/c4cp01572j] [Citation(s) in RCA: 314] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This article reviews recent developments and applications in the area of computational electrochemistry. Our focus is on predicting the reduction potentials of electron transfer and other electrochemical reactions and half-reactions in both aqueous and nonaqueous solutions. Topics covered include various computational protocols that combine quantum mechanical electronic structure methods (such as density functional theory) with implicit-solvent models, explicit-solvent protocols that employ Monte Carlo or molecular dynamics simulations (for example, Car-Parrinello molecular dynamics using the grand canonical ensemble formalism), and the Marcus theory of electronic charge transfer. We also review computational approaches based on empirical relationships between molecular and electronic structure and electron transfer reactivity. The scope of the implicit-solvent protocols is emphasized, and the present status of the theory and future directions are outlined.
Collapse
Affiliation(s)
- Aleksandr V Marenich
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street S.E., Minneapolis, MN 55455-0431, USA.
| | | | | | | | | |
Collapse
|
14
|
Computational Redox Potential Predictions: Applications to Inorganic and Organic Aqueous Complexes, and Complexes Adsorbed to Mineral Surfaces. MINERALS 2014. [DOI: 10.3390/min4020345] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
15
|
Wu QY, Lan JH, Wang CZ, Xiao CL, Zhao YL, Wei YZ, Chai ZF, Shi WQ. Understanding the Bonding Nature of Uranyl Ion and Functionalized Graphene: A Theoretical Study. J Phys Chem A 2014; 118:2149-58. [DOI: 10.1021/jp500924a] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Qun-Yan Wu
- Nuclear
Energy Chemistry Group, Key Laboratory of Nuclear Radiation and Nuclear
Energy Technology and Key Laboratory for Biomedical Effects of Nanomaterials
and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Jian-Hui Lan
- Nuclear
Energy Chemistry Group, Key Laboratory of Nuclear Radiation and Nuclear
Energy Technology and Key Laboratory for Biomedical Effects of Nanomaterials
and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Cong-Zhi Wang
- Nuclear
Energy Chemistry Group, Key Laboratory of Nuclear Radiation and Nuclear
Energy Technology and Key Laboratory for Biomedical Effects of Nanomaterials
and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Cheng-Liang Xiao
- Nuclear
Energy Chemistry Group, Key Laboratory of Nuclear Radiation and Nuclear
Energy Technology and Key Laboratory for Biomedical Effects of Nanomaterials
and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Yu-Liang Zhao
- Nuclear
Energy Chemistry Group, Key Laboratory of Nuclear Radiation and Nuclear
Energy Technology and Key Laboratory for Biomedical Effects of Nanomaterials
and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Yue-Zhou Wei
- Department
of Nuclear Fuel Cycle and Material, School of Nuclear Science and
Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhi-Fang Chai
- Nuclear
Energy Chemistry Group, Key Laboratory of Nuclear Radiation and Nuclear
Energy Technology and Key Laboratory for Biomedical Effects of Nanomaterials
and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- School
of Radiological and Interdisciplinary Sciences, Soochow University, Suzhou 215123, China
| | - Wei-Qun Shi
- Nuclear
Energy Chemistry Group, Key Laboratory of Nuclear Radiation and Nuclear
Energy Technology and Key Laboratory for Biomedical Effects of Nanomaterials
and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
16
|
Bühl M, Sieffert N, Wipff G. Structure of a uranyl peroxo complex in aqueous solution from first-principles molecular dynamics simulations. Dalton Trans 2014; 43:11129-37. [DOI: 10.1039/c3dt52413b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
17
|
Sundararajan M. Designing Novel Nanomaterials through Functionalization of Carbon Nanotubes with Supramolecules for Application in Nuclear Waste Management. SEP SCI TECHNOL 2013. [DOI: 10.1080/01496395.2013.807829] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
|
18
|
Steele HM, Guillaumont D, Moisy P. Density functional theory calculations of the redox potentials of actinide(VI)/actinide(V) couple in water. J Phys Chem A 2013; 117:4500-5. [PMID: 23600693 DOI: 10.1021/jp401875f] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The measured redox potential of an actinide at an electrode surface involves the transfer of a single electron from the electrode surface on to the actinide center. Before electron transfer takes place, the complexing ligands and molecules of solvation need to become structurally arranged such that the electron transfer is at its most favorable. Following the electron transfer, there is further rearrangement to obtain the minimum energy structure for the reduced state. As such, there are three parts to the total energy cycle required to take the complex from its ground state oxidized form to its ground state reduced form. The first part of the energy comes from the structural rearrangement and solvation energies of the actinide species before the electron transfer or charge transfer process; the second part, the energy of the electron transfer; the third part, the energy required to reorganize the ligands and molecules of solvation around the reduced species. The time resolution of electrochemical techniques such as cyclic voltammetry is inadequate to determine to what extent bond and solvation rearrangement occurs before or after electron transfer; only for a couple to be classed as reversible is it fast in terms of the experimental time. Consequently, the partitioning of the energy theoretically is of importance to obtain good experimental agreement. Here we investigate the magnitude of the instantaneous charge transfer through calculating the fast one electron reduction energies of AnO2(H2O)n(2+), where An = U, Np, and Pu, for n = 4-6, in solution without inclusion of the structural optimization energy of the reduced form. These calculations have been performed using a number of DFT functionals, including the recently developed functionals of Zhao and Truhlar. The results obtained for calculated electron affinities in the aqueous phase for the AnO2(H2O)5(2+/+) couples are within 0.04 V of accepted experimental redox potentials, nearly an order of magnitude improvement on previous calculated standard potentials E(0) values, obtained using both DFT and high level multireference approaches.
Collapse
Affiliation(s)
- Helen M Steele
- CEA, Nuclear Energy Division, RadioChemistry & Processes Department, F-30207 Bagnols sur Cèze, France.
| | | | | |
Collapse
|
19
|
Ball GE, Andersen RA. Stereodynamics in Eight-Coordination; A 2D NMR Spectroscopic and Computational Study of the Exchange Process in ThCl 4(Me 2NCH 2CH 2NMe 2) 2. Inorg Chem 2012; 51:10141-7. [DOI: 10.1021/ic300586f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Graham E. Ball
- School of Chemistry, University of New South Wales (UNSW), Sydney, New South Wales 2052, Australia
| | - Richard A. Andersen
- Department of Chemistry and
Chemical Sciences Division of Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720-1460,
United States
| |
Collapse
|
20
|
Sundararajan M, Sinha V, Bandyopadhyay T, Ghosh SK. Can Functionalized Cucurbituril Bind Actinyl Cations Efficiently? A Density Functional Theory Based Investigation. J Phys Chem A 2012; 116:4388-95. [DOI: 10.1021/jp3015194] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mahesh Sundararajan
- Theoretical
Chemistry Section, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Vivek Sinha
- Department of Physical Sciences, Indian Institute of Science Education and Research,
Kolkata 700 064, India
| | - Tusar Bandyopadhyay
- Theoretical
Chemistry Section, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Swapan K. Ghosh
- Theoretical
Chemistry Section, Bhabha Atomic Research Centre, Mumbai 400 085, India
- Homi Bhabha National Institute, Mumbai 400 094, India
| |
Collapse
|
21
|
Bühl M, Sieffert N, Chaumont A, Wipff G. Water versus Acetonitrile Coordination to Uranyl. Effect of Chloride Ligands. Inorg Chem 2012; 51:1943-52. [DOI: 10.1021/ic202270u] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Michael Bühl
- School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9ST, U.K
| | - Nicolas Sieffert
- UMR CNRS-UJF 5250, Département de Chimie Moléculaire, Université Joseph Fourier Grenoble I, BP 53, 38041 Grenoble Cedex 9, France
| | - Alain Chaumont
- UMR 7177 CNRS, Laboratoire MSM, Institut de Chimie, 1 rue Blaise Pascal, 67000 Strasbourg,
France
| | - Georges Wipff
- UMR 7177 CNRS, Laboratoire MSM, Institut de Chimie, 1 rue Blaise Pascal, 67000 Strasbourg,
France
| |
Collapse
|
22
|
Bühl M, Wipff G. Insights into Uranyl Chemistry from Molecular Dynamics Simulations. Chemphyschem 2011; 12:3095-105. [DOI: 10.1002/cphc.201100458] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Revised: 07/28/2011] [Indexed: 11/10/2022]
|
23
|
Bhattacharyya A, Ghanty TK, Mohapatra PK, Manchanda VK. Selective Americium(III) Complexation by Dithiophosphinates: A Density Functional Theoretical Validation for Covalent Interactions Responsible for Unusual Separation Behavior from Trivalent Lanthanides. Inorg Chem 2011; 50:3913-21. [DOI: 10.1021/ic102238c] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Arunasis Bhattacharyya
- Radiochemistry Division and ‡Theoretical Chemistry Section, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - Tapan Kumar Ghanty
- Radiochemistry Division and ‡Theoretical Chemistry Section, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - Prasanta Kumar Mohapatra
- Radiochemistry Division and ‡Theoretical Chemistry Section, Bhabha Atomic Research Centre, Mumbai-400085, India
| | - Vijay Kumar Manchanda
- Radiochemistry Division and ‡Theoretical Chemistry Section, Bhabha Atomic Research Centre, Mumbai-400085, India
| |
Collapse
|
24
|
|
25
|
Effects of the self-interaction error in Kohn–Sham calculations: A DFT+U case study on penta-aqua uranyl(VI). COMPUT THEOR CHEM 2011. [DOI: 10.1016/j.comptc.2010.10.043] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
26
|
Sundararajan M, Rajaraman G, Ghosh SK. Speciation of uranyl ions in fulvic acid and humic acid: a DFT exploration. Phys Chem Chem Phys 2011; 13:18038-46. [DOI: 10.1039/c1cp21238a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
27
|
|
28
|
Doudou S, Arumugam K, Vaughan DJ, Livens FR, Burton NA. Investigation of ligand exchange reactions in aqueous uranyl carbonate complexes using computational approaches. Phys Chem Chem Phys 2011; 13:11402-11. [DOI: 10.1039/c1cp20617f] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
29
|
Réal F, Trumm M, Vallet V, Schimmelpfennig B, Masella M, Flament JP. Quantum Chemical and Molecular Dynamics Study of the Coordination of Th(IV) in Aqueous Solvent. J Phys Chem B 2010; 114:15913-24. [DOI: 10.1021/jp108061s] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Florent Réal
- Université Lille 1 (Sciences et Technologies), Laboratoire PhLAM, CNRS UMR 8523, CERLA, CNRS FR 2416, Bât P5, F-59655 Villeneuve d’Ascq Cedex, France, Institut für Nukleare Entsorgung (INE), Karlsruhe Institute of Technology (KIT), Postfach 3640, D-76021 Karlsruhe, Germany, and Laboratoire de Chimie du Vivant, Service d’ingénierie moléculaire des protéines, Institut de biologie et de technologies de Saclay, CEA Saclay, F-91191 Gif sur Yvette Cedex, France
| | - Michael Trumm
- Université Lille 1 (Sciences et Technologies), Laboratoire PhLAM, CNRS UMR 8523, CERLA, CNRS FR 2416, Bât P5, F-59655 Villeneuve d’Ascq Cedex, France, Institut für Nukleare Entsorgung (INE), Karlsruhe Institute of Technology (KIT), Postfach 3640, D-76021 Karlsruhe, Germany, and Laboratoire de Chimie du Vivant, Service d’ingénierie moléculaire des protéines, Institut de biologie et de technologies de Saclay, CEA Saclay, F-91191 Gif sur Yvette Cedex, France
| | - Valérie Vallet
- Université Lille 1 (Sciences et Technologies), Laboratoire PhLAM, CNRS UMR 8523, CERLA, CNRS FR 2416, Bât P5, F-59655 Villeneuve d’Ascq Cedex, France, Institut für Nukleare Entsorgung (INE), Karlsruhe Institute of Technology (KIT), Postfach 3640, D-76021 Karlsruhe, Germany, and Laboratoire de Chimie du Vivant, Service d’ingénierie moléculaire des protéines, Institut de biologie et de technologies de Saclay, CEA Saclay, F-91191 Gif sur Yvette Cedex, France
| | - Bernd Schimmelpfennig
- Université Lille 1 (Sciences et Technologies), Laboratoire PhLAM, CNRS UMR 8523, CERLA, CNRS FR 2416, Bât P5, F-59655 Villeneuve d’Ascq Cedex, France, Institut für Nukleare Entsorgung (INE), Karlsruhe Institute of Technology (KIT), Postfach 3640, D-76021 Karlsruhe, Germany, and Laboratoire de Chimie du Vivant, Service d’ingénierie moléculaire des protéines, Institut de biologie et de technologies de Saclay, CEA Saclay, F-91191 Gif sur Yvette Cedex, France
| | - Michel Masella
- Université Lille 1 (Sciences et Technologies), Laboratoire PhLAM, CNRS UMR 8523, CERLA, CNRS FR 2416, Bât P5, F-59655 Villeneuve d’Ascq Cedex, France, Institut für Nukleare Entsorgung (INE), Karlsruhe Institute of Technology (KIT), Postfach 3640, D-76021 Karlsruhe, Germany, and Laboratoire de Chimie du Vivant, Service d’ingénierie moléculaire des protéines, Institut de biologie et de technologies de Saclay, CEA Saclay, F-91191 Gif sur Yvette Cedex, France
| | - Jean-Pierre Flament
- Université Lille 1 (Sciences et Technologies), Laboratoire PhLAM, CNRS UMR 8523, CERLA, CNRS FR 2416, Bât P5, F-59655 Villeneuve d’Ascq Cedex, France, Institut für Nukleare Entsorgung (INE), Karlsruhe Institute of Technology (KIT), Postfach 3640, D-76021 Karlsruhe, Germany, and Laboratoire de Chimie du Vivant, Service d’ingénierie moléculaire des protéines, Institut de biologie et de technologies de Saclay, CEA Saclay, F-91191 Gif sur Yvette Cedex, France
| |
Collapse
|
30
|
First-principles study of the separation of Am(III)/Cm(III) from Eu(III) with Cyanex301. Inorg Chem 2010; 49:10307-15. [PMID: 20949954 DOI: 10.1021/ic100844t] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The experimentally observed extraction complexes of trivalent lanthanide Eu(III) and actinide Am(III)/Cm(III) cations with purified Cyanex301 [bis(2,4,4-trimethylpentyl)dithiophosphinic acid, HBTMPDTP denoted as HL], i.e., ML(3) (M = Eu, Am, Cm) as well as the postulated complexes HAmL(4) and HEuL(4)(H(2)O) have been studied by using energy-consistent 4f- and 5f-in-core pseudopotentials for trivalent f elements, combined with density functional theory and second-order Møller-Plesset perturbation theory. Special attention was paid to explaining the high selectivity of Cyanex301 for Am(III)/Cm(III) over Eu(III). It is shown that the neutral complexes ML(3), where L acts as a bidentate ligand and the metal cation is coordinated by six S atoms, are most likely the most stable extraction complexes. The calculated metal-sulfur bond distances for ML(3) do reflect the cation employed; i.e., the larger the cation, the longer the metal-sulfur bond distances. The calculated M-S and M-P bond lengths agree very well with the available experimental data. The obtained changes of the Gibbs free energies in the extraction reactions M(3+) + 3HL → ML(3) + 3H(+) agree with the thermodynamical priority for Am(3+) and Cm(3+). Moreover, the ionic metal-ligand dissociation energies of the extraction complexes ML(3) show that, although EuL(3) is the most stable complex in the gas phase, it is the least stable in aqueous solution.
Collapse
|
31
|
Wiebke J, Weigand A, Weissmann D, Glorius M, Moll H, Bernhard G, Dolg M. Combined Computational and Experimental Study of Uranyl(VI) 1:2 Complexation by Aromatic Acids. Inorg Chem 2010; 49:6428-35. [DOI: 10.1021/ic902496u] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jonas Wiebke
- Institut für Theoretische Chemie, Department für Chemie, Universität zu Köln, Greinstrasse 4, D-50939 Köln, Germany
| | - Anna Weigand
- Institut für Theoretische Chemie, Department für Chemie, Universität zu Köln, Greinstrasse 4, D-50939 Köln, Germany
| | - Daniel Weissmann
- Institut für Theoretische Chemie, Department für Chemie, Universität zu Köln, Greinstrasse 4, D-50939 Köln, Germany
| | - Maja Glorius
- Forschungszentrum Dresden−Rossendorf e.V., Institut für Radiochemie, P.O. Box 510119, D-01314 Dresden, Germany
| | - Henry Moll
- Forschungszentrum Dresden−Rossendorf e.V., Institut für Radiochemie, P.O. Box 510119, D-01314 Dresden, Germany
| | - Gert Bernhard
- Forschungszentrum Dresden−Rossendorf e.V., Institut für Radiochemie, P.O. Box 510119, D-01314 Dresden, Germany
| | - Michael Dolg
- Institut für Theoretische Chemie, Department für Chemie, Universität zu Köln, Greinstrasse 4, D-50939 Köln, Germany
| |
Collapse
|
32
|
Oncák M, Schröder D, Slavícek P. Theoretical study of the microhydration of mononuclear and dinuclear uranium(VI) species derived from solvolysis of uranyl nitrate in water. J Comput Chem 2010; 31:2294-306. [PMID: 20340110 DOI: 10.1002/jcc.21521] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The structures and energetics of mononuclear and dinuclear uranium species formed upon speciation of uranyl(VI) nitrate, UO(2)(NO(3))(2), in water are investigated by quantum chemistry using density functional theory and the wavefunction-based methods (MP2, CCSD, CCSD(T)). We provide a discussion of the basic coordination patterns of the various mono- and dinuclear uranyl compounds [(UO(2))(m)(X,Y)(2m-1)(H2O)(n)](+) (m = 1, 2; n = 0-4) found in a recent mass spectrometric study (Tsierkezos et al., Inorg Chem 2009, 48, 6287). The energetics of the complexation of the uranyl dication to the counterions OH(-) and NO(3) (-) as well as the degradation of the dinuclear species were studied by reference to a test set of 16 representative molecules with the MP2 method and the B3LYP, M06, M06-HF, and M06-2X DFT functionals. All DFT functionals provide structures and energetics close to MP2 results, with M06 family being slightly superior to the standard B3LYP functional.
Collapse
Affiliation(s)
- Milan Oncák
- Department of Physical Chemistry, Institute of Chemical Technology Prague, Czech Republic
| | | | | |
Collapse
|
33
|
Bühl M, Schreckenbach G. Oxygen Exchange in Uranyl Hydroxide via Two “Nonclassical” Ions. Inorg Chem 2010; 49:3821-7. [DOI: 10.1021/ic902508z] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Michael Bühl
- School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9ST, United Kingdom
| | - Georg Schreckenbach
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada, R3T 2N2
| |
Collapse
|
34
|
Cao Z, Balasubramanian K. Theoretical studies of UO2(OH)(H2O)n+, UO2(OH)2(H2O)n, NpO2(OH)(H2O)n, and PuO2(OH)(H2O)n+ (n≤21) complexes in aqueous solution. J Chem Phys 2009; 131:164504. [DOI: 10.1063/1.3244041] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
|
35
|
On the combined use of discrete solvent models and continuum descriptions of solvent effects in ligand exchange reactions: a case study of the uranyl(VI) aquo ion. Theor Chem Acc 2009. [DOI: 10.1007/s00214-009-0627-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
36
|
Austin JP, Sundararajan M, Vincent MA, Hillier IH. The geometric structures, vibrational frequencies and redox properties of the actinyl coordination complexes ([AnO2(L)n]m; An = U, Pu, Np; L = H2O, Cl−, CO32−, CH3CO2−, OH−) in aqueous solution, studied by density functional theory methods. Dalton Trans 2009:5902-9. [DOI: 10.1039/b901724k] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|