1
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Leung K, Ilgen AG. Modeling separation of lanthanides via heterogeneous ligand binding. Phys Chem Chem Phys 2024. [PMID: 39018152 DOI: 10.1039/d4cp00880d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/19/2024]
Abstract
Individual lanthanide elements have physical/electronic/magnetic properties that make each useful for specific applications. Several of the lanthanides cations (Ln3+) naturally occur together in the same ores. They are notoriously difficult to separate from each other due to their chemical similarity. Predicting the Ln3+ differential binding energies (ΔΔE) or free energies (ΔΔG) at different binding sites, which are key figures of merit for separation applications, will help design of materials with lanthanide selectivity. We apply ab initio molecular dynamics (AIMD) simulations and density functional theory (DFT) to calculate ΔΔG for Ln3+ coordinated to ligands in water and embedded in metal-organic frameworks (MOFs), and ΔΔE for Ln3+ bonded to functionalized silica surfaces, thus circumventing the need for the computational costly absolute binding (free) energies ΔG and ΔE. Perturbative AIMD simulations of water-inundated simulation cells are applied to examine the selectivity of ligands towards adjacent Ln3+ in the periodic table. Static DFT calculations with a full Ln3+ first coordination shell, while less rigorous, show that all ligands examined with net negative charges are more selective towards the heavier lanthanides than a charge-neutral coordination shell made up of water molecules. Amine groups are predicted to be poor ligands for lanthanide-binding. We also address cooperative ion binding, i.e., using different ligands in concert to enhance lanthanide selectivity.
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Affiliation(s)
- Kevin Leung
- Geochemistry Department, MS 0750, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.
| | - Anastasia G Ilgen
- Geochemistry Department, MS 0750, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.
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2
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Pu N, Archer E, He X, Chen J, Rao L, Shafer JC, Yang P, Xu C. Tuning Selectivity to f-Elements through Bonding and Solvation Effects of a Sulfur Donor Ligand. Inorg Chem 2024; 63:6845-6853. [PMID: 38568878 DOI: 10.1021/acs.inorgchem.4c00297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
Bis(2,4,4-trimethylpentyl)dithiophosphinic acid, commonly referred to as HBTMPDTP or Cyanex301, is a sulfur-donating ligand that shows considerable promise in the challenging task of separating trivalent actinides (An3+) from lanthanides (Ln3+). Although its effectiveness has been established, the specific molecular details about the preference of HBTMPDTP for americium over europium have remained a mystery, puzzling researchers for over two decades. This study presents a comprehensive, dual-driven separation mechanism for this complex system combining experimental and theoretical approaches. A critical finding is the increased covalency in An-S bonds compared to Ln-S bonds, which plays a significant role in HBTMPDTP's intrinsic selectivity for An3+ over Ln3+. This leads to the formation of distinct An3+ and Ln3+ species, enhancing the ligand's actinide selectivity. Additionally, it provides crucial insights into the coordination chemistry of f-elements with sulfur-donating ligands, thereby deepening our understanding of this intricate field.
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Affiliation(s)
- Ning Pu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Emma Archer
- Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Xihong He
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Jing Chen
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Linfeng Rao
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jenifer C Shafer
- Department of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Ping Yang
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
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3
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Duvail M, Moreno Martinez D, Žiberna L, Guillam E, Dufrêche JF, Guilbaud P. Modeling Lanthanide Ions in Solution: A Versatile Force Field in Aqueous and Organic Solvents. J Chem Theory Comput 2024. [PMID: 38221754 DOI: 10.1021/acs.jctc.3c01162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
In this paper, we propose a new nonpolarizable force field for describing the Ln3+ (Ln = lanthanide) series based on a 12-6-4 Lennard-Jones potential. The development of the force field was performed in pure water by adjusting both the ion-oxygen distance and the hydration free energy. This force field accurately reproduces the Ln3+ hydration properties through the series, especially the coordination number that is hardly accessible using a nonpolarizable force field. Then, the validity and the transferability of the current force field were evaluated for two different systems containing Ln3+ in various solvents, namely, 0.1 mol L-1 La(NO3)3 salts in methanol and Eu(NO3)3 salts in solvent organic phases composed of DMDOHEMA molecules in n-heptane. The good agreement between our simulations and the data available in the literature confirms the accuracy of the force field for describing the lanthanide cations in both aqueous and nonaqueous media.
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Affiliation(s)
- Magali Duvail
- ICSM, University of Montpellier, CEA, CNRS, ENSCM, 30207 Bagnols-sur-Cèze, France
| | - Diego Moreno Martinez
- CEA, DES, ISEC, DMRC, LILA, University of Montpellier, Marcoule, 30207 Bagnols-sur-Cèze, France
| | - Lara Žiberna
- ICSM, University of Montpellier, CEA, CNRS, ENSCM, 30207 Bagnols-sur-Cèze, France
| | - Erwann Guillam
- ICSM, University of Montpellier, CEA, CNRS, ENSCM, 30207 Bagnols-sur-Cèze, France
| | | | - Philippe Guilbaud
- CEA, DES, ISEC, DMRC, University of Montpellier, Marcoule, 30207 Bagnols-sur-Cèze, France
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4
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Larrinaga WB, Cotruvo JA, Worrell BT, Eaton SS, Eaton GR. Electron Paramagnetic Resonance, Electronic Ground State, and Electron Spin Relaxation of Seven Lanthanide Ions Bound to Lanmodulin and the Bioinspired Chelator, 3,4,3-LI(1,2-HOPO). Chemistry 2023; 29:e202303215. [PMID: 37802965 DOI: 10.1002/chem.202303215] [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: 10/01/2023] [Revised: 10/05/2023] [Accepted: 10/06/2023] [Indexed: 10/08/2023]
Abstract
The electron paramagnetic resonance (EPR) spectra of lanthanide(III) ions besides Gd3+ , bound to small-molecule and protein chelators, are uncharacterized. Here, the EPR properties of 7 lanthanide(III) ions bound to the natural lanthanide-binding protein, lanmodulin (LanM), and the synthetic small-molecule chelator, 3,4,3-LI(1,2-HOPO) ("HOPO"), were systematically investigated. Echo-detected pulsed EPR spectra reveal intense signals from ions for which the normal continuous-wave first-derivative spectra are negligibly different from zero. Spectra of Kramers lanthanide ions Ce3+ , Nd3+ , Sm3+ , Er3+ , and Yb3+ , and non-Kramers Tb3+ and Tm3+ , bound to LanM are more similar to the ions in dilute aqueous:ethanol solution than to those coordinated with HOPO. Lanmodulins from two bacteria, with distinct metal-binding sites, had similar spectra for Tb3+ but different spectra for Nd3+ . Spin echo dephasing rates (1/Tm ) are faster for lanthanides than for most transition metals and limited detection of echoes to temperatures below ~6 to 12 K. Dephasing rates were environment dependent and decreased in the order water:ethanol>LanM>HOPO, which is attributed to decreasing librational motion. These results demonstrate that the EPR spectra and relaxation times of lanthanide(III) ions are sensitive to coordination environment, motivating wider application of these methods for characterization of both small-molecule and biomolecule interactions with lanthanides.
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Affiliation(s)
- Wyatt B Larrinaga
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania, 16802, United States
| | - Joseph A Cotruvo
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania, 16802, United States
| | - Brady T Worrell
- Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado, 80208, United States
| | - Sandra S Eaton
- Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado, 80208, United States
| | - Gareth R Eaton
- Department of Chemistry and Biochemistry, University of Denver, Denver, Colorado, 80208, United States
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5
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Ghosh A, Pandey A, Sengupta A, Kathirvelu V, Harmalkar SS, Dhuri SN, Singh KS, Ghanty TK. Experimental and Theoretical Investigation on the Extractive Mass Transfer of Eu 3+ Ions Using Novel Amide Ligands in 1-Hexyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide. Inorg Chem 2023; 62:14678-14693. [PMID: 37624686 DOI: 10.1021/acs.inorgchem.3c01963] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/27/2023]
Abstract
Novel amide ligands in the ionic liquid (1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) were utilized for the liquid-liquid biphasic mass transfer of Eu3+ ions from aqueous acidic waste solution. The cation exchange mechanism was found to be operative with the formation of [Eu(NO3)2L3]+ species (L = 4-chloro-N-(1-methyl-1H-pyrazol-3-yl)picolinamide). However, the presence of an inner-sphere water molecule was revealed by density functional theory (DFT) calculations. The viscosity-induced slower kinetics was evidenced during mass transfer, which was improved by increasing temperature. The process was exothermic in nature. The improvement in the kinetics of extractive mass transfer at higher temperatures is evinced by a reduction in the distribution ratio value. The spontaneity of the reaction was evidenced through the negative Gibbs free energy value, whereas the process enhances the entropy of the system, probably by releasing water molecules at least partially during complexation. The structures of bare ligands and complexes have been optimized by using DFT calculations. A high value of complexation energy, solvation energy, and associated enthalpy and free energy change reveal the efficacy in binding Eu with O and N donor atoms. In addition, natural population analysis, atoms-in-molecules analysis, and energy decomposition analysis have been employed to explore the nature of bonding existing in Eu-O and Eu-N bonds.
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Affiliation(s)
- Ayan Ghosh
- Laser and Plasma Technology Division, Beam Technology Development Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Amit Pandey
- Department of Applied Sciences, National Institute of Technology Goa, Ponda, Goa 403401, India
| | - Arijit Sengupta
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
- HomiBhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Velavan Kathirvelu
- Department of Applied Sciences, National Institute of Technology Goa, Ponda, Goa 403401, India
| | | | - Sunder N Dhuri
- School of Chemical Sciences, Goa University, Taleigao, Goa 403206, India
| | - Keisham S Singh
- Bioorganic Chemistry Laboratory, CSIR-National Institute of Oceanography, Dona Paula, Goa 403004, India
| | - Tapan K Ghanty
- HomiBhabha National Institute, Anushaktinagar, Mumbai 400094, India
- Bio-Science Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
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6
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Friedman R. Estimating the Gibbs Hydration Energies of Actinium and Trans-Plutonium Actinides. Chemphyschem 2023; 24:e202200516. [PMID: 36149643 PMCID: PMC10100388 DOI: 10.1002/cphc.202200516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/23/2022] [Indexed: 01/20/2023]
Abstract
The use of actinides for medical, scientific and technological purposes has gained momentum in the recent years. This creates a need to understand their interactions with biomolecules, both at the interface and as they become complexed. Calculation of the Gibbs binding energies of the ions to biomolecules, i. e., the Gibbs energy change associated with a transfer of an ion from the water phase to its binding site, could help to understand the actinides' toxicities and to design agents that bind them with high affinities. To this end, there is a need to obtain accurate reference values for actinide hydration, that for most actinides are not available from experiment. In this study, a set of ionic radii is developed that enables future calculations of binding energies for Pu3+ and five actinides with renewed scientific and technological interest: Ac3+ , Am3+ , Cm3+ , Bk3+ and Cf3+ . Reference hydration energies were calculated using quantum chemistry and ion solvation theory and agree well for all ions except Ac3+ , where ion solvation theory seems to underestimate the magnitude of the Gibbs hydration energy. The set of radii and reference energies that are presented here provide means to calculate binding energies for actinides and biomolecules.
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Affiliation(s)
- Ran Friedman
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, SE-391 82, Sweden
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7
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Lu JB, Jiang XL, Hu HS, Li J. Norm-Conserving 4f-in-Core Pseudopotentials and Basis Sets Optimized for Trivalent Lanthanides (Ln = Ce-Lu). J Chem Theory Comput 2023; 19:82-96. [PMID: 36512750 DOI: 10.1021/acs.jctc.2c00922] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We present here a set of scalar-relativistic norm-conserving 4f-in-core pseudopotentials, together with complementary valence-shell Gaussian basis sets, for the lanthanide (Ln) series (Ce-Lu). The Goedecker, Teter, and Hutter (GTH) formalism is adopted with the generalized gradient approximation (GGA) for the exchange-correlation Perdew-Burke-Ernzerhof (PBE) functional. The 4f-in-core pseudopotentials are built through attributing 4f-subconfiguration 4fn (n = 1-14) for Ln (Ln = Ce-Lu) into the atomic core region, making it possible to circumvent the difficulty of the description of the open 4fn valence shell. A wide variety of computational benchmarks and tests have been carried out on lanthanide systems including Ln3+-containing molecular complexes, aqueous solutions, and bulk solids to validate the accuracy, reliability, and efficiency of the optimized 4f-in-core GTH pseudopotentials and basis sets. The 4f-in-core GTH pseudopotentials successfully replicate the main features of lanthanide structural chemistry and reaction energetics, particularly for nonredox reactions. The chemical bonding features and solvation shells, hydrolysis energetics, acidity constants, and solid-state properties of selected lanthanide systems are also discussed in detail by utilizing these new 4f-in-core GTH pseudopotentials. This work bridges the idea of keeping highly localized 4f electrons in the atomic core and efficient pseudopotential formalism of GTH, thus providing a highly efficient approach for studying lanthanide chemistry in multi-scale modeling of constituent-wise and structurally complicated systems, including electronic structures of the condensed phase and first-principles molecular dynamics simulations.
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Affiliation(s)
- Jun-Bo Lu
- Department of Chemistry and Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xue-Lian Jiang
- Department of Chemistry and Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China
| | - Han-Shi Hu
- Department of Chemistry and Engineering Research Center of Advanced Rare-Earth Materials of Ministry of Education, Tsinghua University, Beijing 100084, China
| | - Jun Li
- Department of Chemistry and Guangdong Provincial Key Laboratory of Catalytic Chemistry, Southern University of Science and Technology, Shenzhen 518055, China.,Department of Chemistry and Engineering Research Center of Advanced Rare-Earth Materials of Ministry of Education, Tsinghua University, Beijing 100084, China
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8
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Chen Z, Yang J. Bonding properties of molecular cerium oxides tuned by the 4 f-block from ab initio perspective. J Chem Phys 2022; 156:211101. [DOI: 10.1063/5.0090214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Probing chemical bonding in molecules containing lanthanide elements is of theoretical interest, yet it is computationally challenging because of the large valence space, relativistic effects, and considerable electron correlation. We report a high-level ab initio study that quantifies the many-body nature of Ce–O bonding with the coordination environment of the Ce center and particularly the roles of the 4 f orbitals. The growing significance of the overlap between Ce 4 f and O 2 p orbitals with the increasing coordination of Ce atoms enhances Ce–O bond covalency and in return directs the molecular geometry. Upon partial reduction from neutral to anionic ceria, the excessive electrons populate the Ce-centered localized 4 f orbital. The interplay between the admixture and localization of the 4 f-block dually modulates bonding patterns of cerium oxide molecules, underlying the importance of many-body interactions between ligands and various lanthanide elements.
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Affiliation(s)
- Ziyong Chen
- Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Jun Yang
- Department of Chemistry, The University of Hong Kong, Hong Kong, China
- Hong Kong Quantum AI Lab Ltd., Hong Kong Science Park, Hong Kong, China
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9
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Zheng H, Li Y, Zhang X, Han J, Li S, Wu G, Liu Q, Liu X, Liao W. Interaction-determined extraction capacity between rare earth ions and extractants: taking lanthanum and lutetium as models through theoretical calculations. Inorg Chem Front 2022. [DOI: 10.1039/d2qi01261h] [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
Extractant plays an important role in the separation and purification of rare earth elements (REEs), whereas, extraction performance is the most effective tactic to evaluate whether an extractant is complete...
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10
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Dumpala RMR, Sharma S, Boda A, Rawat N, Ali SM. The aqueous interaction of neodymium with two omni existent biomoieties - a mechanistic understanding by experimental and theoretical studies. Dalton Trans 2021; 50:16191-16204. [PMID: 34724008 DOI: 10.1039/d1dt02939h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Neodymium (Nd), a technologically important metal ion, has emerged as a major contaminant in aquatic systems in recent years owing to its surge in electrical and electronic applications as a permanent magnet. The chelating molecules present in hydro- and biospheres could substantially enhance its absorption and lead to transportation and migration of Nd from the source. The mechanistic understanding of the Nd interaction with naturally relevant biomoieties present in flora and fauna is of primitive importance to estimate the toxicological effects of the metal ion. The present studies aimed at understanding the aquatic interaction of Nd with two biomoieties namely pyrazine-2-carboxylic acid (P2C) and pyrazine-2,3-dicarboxylic acid (P23C) by multiple experimental determinations and theoretical estimations. Potentiometry and spectrophotometry were employed to determine the aquatic speciation and thermodynamic stability of the complexes. Both techniques supported the formation of MLi (i = 1-4) complexes by Nd(III) with P2C and MLi (i = 1-3) complexes with P23C. The Nd-P23C complexes are more stable than the Nd-P2C complexes for ML formation, while the opposite trend is observed for the ML2 and ML3 complexes. Titration calorimetry was used to determine the enthalpies of complexation which was found to be exothermic and majorly favored by entropy contributions. The formation of the Nd(III)-P2C complexes is more exothermic than that of the respective Nd(III)-P23C complexes. Density functional theory was employed for the geometry optimization of the predicted complexes and for the estimation of the bond distances and partial charges on the coordinating atoms in the optimized geometries. Experimental insights provide crucial inputs at the macro (thermodynamic) level and theoretical calculations help in understanding the complexation process at the molecular level.
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Affiliation(s)
| | - Shikha Sharma
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.
| | - Anil Boda
- Chemical Engineering Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Neetika Rawat
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.
| | - Sk Musharaf Ali
- Chemical Engineering Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
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11
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Study of Mono-fluorinated Derivative of Benzoyltrifluoroacetone. J SOLUTION CHEM 2021. [DOI: 10.1007/s10953-021-01112-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Leung K, Ilgen AG, Criscenti LJ. Interplay of physically different properties leading to challenges in separating lanthanide cations - an ab initio molecular dynamics and experimental study. Phys Chem Chem Phys 2021; 23:5750-5759. [PMID: 33662085 DOI: 10.1039/d1cp00031d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lanthanide elements have well-documented similarities in their chemical behavior, which make the valuable trivalent lanthanide cations (Ln3+) particularly difficult to separate from each other in water. In this work, we apply ab initio molecular dynamics simulations to compare the free energies (ΔGads) associated with the adsorption of lanthanide cations to silica surfaces at a pH condition where SiO- groups are present. The predicted ΔGads for lutetium (Lu3+) and europium (Eu3+) are similar within statistical uncertainties; this is in qualitative agreement with our batch adsorption measurements on silica. This finding is remarkable because the two cations exhibit hydration free energies (ΔGhyd) that differ by >2 eV, different hydration numbers, and different hydrolysis behavior far from silica surfaces. We observe that the similarity in Lu3+ and Eu3+ ΔGads is the result of a delicate cancellation between the difference in Eu3+ and Lu3+ hydration (ΔGhyd), and their difference in binding energies to silica. We propose that disrupting this cancellation at the two end points, either for adsorbed or completely desorbed lanthanides (e.g., via nanoconfinment or mixed solvents), will lead to effective Ln3+ separation.
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Affiliation(s)
- Kevin Leung
- Sandia National Laboratories, MS 1415, Albuquerque, NM 87185, USA.
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13
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Olea F, Rosales G, Quintriqueo A, Romero J, Pizarro J, Ortiz C, Quijada-Maldonado E. Theoretical prediction of selectivity in solvent extraction of La(III) and Ce(III) from aqueous solutions using β-diketones as extractants and kerosene and two imidazolium-based ionic liquids as diluents via quantum chemistry and COSMO-RS calculations. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114655] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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14
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Lutoshkin MA, Petrov AI, Malyar YN, Kazachenko AS. Interaction of Rare-Earth Metals and Some Perfluorinated β-Diketones. Inorg Chem 2021; 60:3291-3304. [PMID: 33570922 DOI: 10.1021/acs.inorgchem.0c03717] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this work, we demonstrate the fundamental relationships between stability constants and periodic, acid-base, and structural parameters for complexes of some 1,3-diketones. The four analogues of hexafluoroacetylacetone-2-thenoyltrifluoroacetone, 2-furoyltrifluoroacetone, benzoyltrifluoroacetone, and 2-naphthyltrifluoroacetone-have been studied as chelating ligands for 16 rare-earth metals (Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) in aqueous solutions. Systems have been investigated spectrophotometrically using a multiwave nonlinear least-squares regression algorithm for data processing. Conditional stability constants were obtained for a wide pH region (2.0-5.4) at constant ionic strength (I = 0.5 M, NaCl). To receive the apparent ("true") equilibrium parameters, acid-base and keto-enol characteristics of the studied ligands have been described and revised for specific conditions. Dissociation constants were obtained in citrate-phosphate buffer media and protonation parameters were received in concentrated hydrochloric acid by the Cox-Yates method. The apparent formation constants for monocomplex species were obtained as thermodynamic invariants (depend only on the temperature) for each ligand and lie from 4.2 to 12.7 logarithmic units. Although the studied ligands have similar values of pKa, the stabilities of their complexes vary considerably. Systematic analysis of 64 apparent stability constants demonstrates that the force of interaction between the metals and nonsymmetric β-diketones increases as 2-furoyltrifluoroacetone < 2-thenoyltrifluoroacetone < benzoyltrifluoroacetone < 2-naphthyltrifluoroacetone. The studied ligands display varying degrees of the correlation between the periodic parameters and formation constants. Naphthyltrifluoroacetone and its complexes with heavy lanthanides exhibit a clear trend in properties with increasing ionic potential. In general, the received set of data can be described from purely electrostatic grounds within the framework of the periodic law. Spectral, keto-enol, acid-base, and complexing properties were reproduced using density functional theory modeling and explain some of the regularities discovered.
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Affiliation(s)
- Maxim A Lutoshkin
- Institut de Recherches sur la Catalyse et l'Environnement de Lyon, Université de Claude Bernard Lyon 1, CNRS, IRCELYON, Villeurbanne 69626, France.,Institute of Chemistry and Chemical Technology, Federal Research Center "Krasnoyarsk Science Center Siberian Branch Russian Academy of Sciences (SB RAS)", Krasnoyarsk 660036, Russian Federation
| | - Alexander I Petrov
- Institute of Chemistry and Chemical Technology, Federal Research Center "Krasnoyarsk Science Center Siberian Branch Russian Academy of Sciences (SB RAS)", Krasnoyarsk 660036, Russian Federation
| | - Yuriy N Malyar
- Institute of Chemistry and Chemical Technology, Federal Research Center "Krasnoyarsk Science Center Siberian Branch Russian Academy of Sciences (SB RAS)", Krasnoyarsk 660036, Russian Federation.,Institute of Non-Ferrous Metals and Materials Science, Siberian Federal University, Krasnoyarsk 660025, Russian Federation
| | - Alexandr S Kazachenko
- Institute of Chemistry and Chemical Technology, Federal Research Center "Krasnoyarsk Science Center Siberian Branch Russian Academy of Sciences (SB RAS)", Krasnoyarsk 660036, Russian Federation.,Institute of Non-Ferrous Metals and Materials Science, Siberian Federal University, Krasnoyarsk 660025, Russian Federation
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15
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Xian D, Zhou W, Wang J, Pan D, Li X, Li Y, Shi Y, Wu W, Tan Z, Liu C. Multiple investigations of aqueous Eu(III)-oxalate complexes: the reduction in coordination number and validation of spectral linear correlation. Dalton Trans 2021; 50:9388-9398. [PMID: 34096939 DOI: 10.1039/d1dt00609f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Detailed information on the An(iii)/Ln(iii) complexation properties in solution is essential for separation chemistry and the prediction of their potential for radionuclide migration from nuclear waste repositories into natural aquifers. In the present study, to better reveal and confirm the structural information of [Eu(Ox)x (H2O)h-2x]3-2x (h = 8, 9; x = 0-3) aqueous species, especially the variable coordination number (CN), and explore the validity of the spectral linear correlation between the luminescence lifetime and the residual hydration number in the first coordination sphere of Eu(iii) compounds in solution, a comparison between the spectral results and the theoretical calculations in a wide parametric space in terms of the pH value and oxalate concentration was carried out by combining time-resolved luminescence spectroscopy (TRLS) with speciation modelling and density functional theory (DFT) calculations. We have found direct and clear evidence for the 9-fold to 8-fold coordination number reduction of Eu(iii) atoms upon coordination with more than one oxalate in an aqueous medium, and as well systematically validated the applicability of the spectral linear correlation in an aqueous system (otherwise solid state) involving multiple species with the support of relatively reliable and clear speciation modelling.
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Affiliation(s)
- Dongfan Xian
- Beijing National Laboratory for Molecular Sciences, Fundamental Science Laboratory on Radiochemistry and Radiation Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
| | - Wanqiang Zhou
- Beijing National Laboratory for Molecular Sciences, Fundamental Science Laboratory on Radiochemistry and Radiation Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
| | - Jingyi Wang
- Beijing National Laboratory for Molecular Sciences, Fundamental Science Laboratory on Radiochemistry and Radiation Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
| | - Duoqiang Pan
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Xiaolong Li
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900, China
| | - Yao Li
- Beijing National Laboratory for Molecular Sciences, Fundamental Science Laboratory on Radiochemistry and Radiation Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
| | - Yanlin Shi
- Beijing National Laboratory for Molecular Sciences, Fundamental Science Laboratory on Radiochemistry and Radiation Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
| | - Wangsuo Wu
- Radiochemistry Laboratory, School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China
| | - Zhaoyi Tan
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900, China
| | - Chunli Liu
- Beijing National Laboratory for Molecular Sciences, Fundamental Science Laboratory on Radiochemistry and Radiation Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
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16
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Kaneko M, Sasaki Y, Matsumiya M, Nakase M, Takeshita K. Density functional modeling of Am3+/Eu3+ selectivity with diethylenetriaminepentaacetic acid and its bisamide chelates. J NUCL SCI TECHNOL 2020. [DOI: 10.1080/00223131.2020.1842267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Masashi Kaneko
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency, Naka-gun, Ibaraki, Japan
| | - Yuji Sasaki
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency, Naka-gun, Ibaraki, Japan
| | - Masahiko Matsumiya
- Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Kanagawa, Japan
| | - Masahiko Nakase
- Fukushima Reconstruction and Revitalization Unit, Institute of Innovative Research, Tokyo Institute of Technology, Tokyo, Japan
| | - Kenji Takeshita
- Fukushima Reconstruction and Revitalization Unit, Institute of Innovative Research, Tokyo Institute of Technology, Tokyo, Japan
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17
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Viltres H, López YC, Gupta NK, Leyva C, Paz R, Gupta A, Sengupta A. Functional metal-organic frameworks for metal removal from aqueous solutions. SEPARATION & PURIFICATION REVIEWS 2020. [DOI: 10.1080/15422119.2020.1839909] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Herlys Viltres
- Centro De Investigación En Ciencia Aplicada Y Tecnología Avanzada, Instituto Politécnico Nacional, CDMX, Mexico
| | - Yeisy C. López
- Centro De Investigación En Ciencia Aplicada Y Tecnología Avanzada, Instituto Politécnico Nacional, CDMX, Mexico
- Laboratorio De Bioninorgánica, Facultad De Química, Universidad De La Habana, Havana, Cuba
| | - Nishesh Kumar Gupta
- University of Science and Technology (UST), Daejeon, Republic of Korea
- Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, Republic of Korea
| | - Carolina Leyva
- Centro De Investigación En Ciencia Aplicada Y Tecnología Avanzada, Instituto Politécnico Nacional, CDMX, Mexico
| | - Roxana Paz
- Centro De Investigación En Ciencia Aplicada Y Tecnología Avanzada, Instituto Politécnico Nacional, CDMX, Mexico
| | - Anjali Gupta
- Department of Chemistry, Dayalbagh Educational Institute, Agra, India
| | - Arijit Sengupta
- Radiochemistry Division, Bhabha Atomic Research Center, Mumbai, India
- Homi Bhabha National Institute, Mumbai, India
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18
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Sinharoy P, Singha Deb AK, Ali SM, Sharma JN, Kaushik CP. Ligand architectural effect on coordination, bonding, interaction, and selectivity of Am(iii) and Ln(iii) ions with bitopic ligands: synthesis, solvent extraction, and DFT studies. Phys Chem Chem Phys 2020; 22:15448-15462. [PMID: 32602482 DOI: 10.1039/d0cp01615b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The isolation of Am(iii) ion from Ln(iii) ions is very crucial for the safe disposal of nuclear wastes and thus, studies are being continuously pursued to accomplish this goal. In view of this, herein, a new conformationally rigid bitopic ligand, N,N,N',N'-tetra(2-ethylhexyl)piperazine-di-methylenecarboxamide (PIPDA) has been synthesized and studied for the separation of Am(iii) from Ln(iii) ions. The effect of structural rigidification on the selectivity of Am(iii) over Ln(iii) was compared with an open chain flexible compound, namely, N,N,N',N'-tetra(2-ethylhexyl)-3,6-(N'',N'''-dibutyl)diaza-octane-1,8-diamide (DADA). Two oxygen atoms of the diamide moiety seem to be responsible for controlling the metal ion extraction ability of PIPDA, whereas two nitrogen atoms of the piperazine moiety most probably dictate the separation factor between the Am(iii) and Eu(iii) ions in PIPDA. In addition, scalar relativistic density functional theory (DFT) in conjunction with Born-Haber thermodynamics was used herein to compliment the experimental selectivity. The experimentally observed preferential selectivity of PIPDA for Am(iii) ion over the Ln(iii) ion was corroborated by the computed extraction free energy, ΔGext. The covalent nature of bonding between the metal ions and the ligand was confirmed by analyzing the Mayer bond order and bond character analysis using the atom in molecule concept. Though the conformational rigidity of PIPDA gives stronger interaction than DADA, it does not offer a significant advantage over DADA in terms of the separation factor. The marginal increase in the separation factor for PIPDA over DADA might be attributed to the piperazine nitrogen and to the ligand architecture during complex formation.
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Affiliation(s)
- P Sinharoy
- Process Development Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India.
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19
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McCarver GA, Hinde RJ, Vogiatzis KD. Selecting Quantum-Chemical Methods for Lanthanide-Containing Molecules: A Balance between Accuracy and Efficiency. Inorg Chem 2020; 59:10492-10500. [DOI: 10.1021/acs.inorgchem.0c00808] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Gavin A. McCarver
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - Robert J. Hinde
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
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20
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Xia M, Yang X, Chai Z, Wang D. Stronger Hydration of Eu(III) Impedes Its Competition against Am(III) in Binding with N-donor Extractants. Inorg Chem 2020; 59:6267-6278. [PMID: 32282197 DOI: 10.1021/acs.inorgchem.0c00374] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The significance of understanding the interaction between actinide(III)/lanthanide(III) (An(III)/Ln(III)) and N-donor extractants lies in the importance of efficient An3+/Ln3+ separation in advanced nuclear fuel cycles and the high expectation of the application of N-donor extractants. This work reports a density functional theory study aiming at a plausible explanation of the origin of the selectivity of the ligands in An3+/Ln3+ separation and an evaluation of the influence of the bridging groups of typical N-donor extractants. Five bis(triazine) N-donor ligands were considered, differing in their denticity dictated by their bridging groups and in the flexibility of these bridging groups. The results showed much stronger hydration of Eu(III) in comparison to Am(III) in the ligand exchange of aqua ligands by N-donor ligands, while there was a moderate difference in their interaction strengths with the N-donor ligands. This implicated that the distinct difficulty in desolvating Eu(III) and Am(III) may govern their selectivity in liquid-liquid extraction. The analysis of the role of the bridging groups of the ligands confirmed the importance of a ligand to be equipped with preorganized binding sites to minimize the perturbation of entropy. We tentatively propose that this conclusion may hold in the explanation of the low selectivity of oxygenated extractants and the high selectivity of extractants with soft donors in An3+/Ln3+ separation.
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Affiliation(s)
- Miaoren Xia
- Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Xia Yang
- Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China.,Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China
| | - Zhifang Chai
- Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.,State Key Laboratory of Radiation Medicine and Protection nd School of Radiation Medicine and Interdisciplinary Sciences (RAD-X), Soochow University, Suzhou 215123, People's Republic of China
| | - Dongqi Wang
- Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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21
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Burk J, Adamson A, Sikk L, Tämm K, Pupart A, Burk P. DFT study of 2,9-bis(1,2,4-triazin-3-yl)-1,10-phenanthroline (BTPhen) and its derivatives complexation with lanthanide series. COMPUT THEOR CHEM 2020. [DOI: 10.1016/j.comptc.2020.112729] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Abstract
AbstractThe totally symmetric stretching mode $$\nu_{1}$$ν1 Ln–(OH2) of the first hydration shells of all the rare earth (RE) ions across the series from lanthanum to lutetium has been measured on dilute aqueous perchlorate solutions at room temperature. An S-shaped relationship has been found between the $$\nu_{1}$$ν1 Ln–(OH2) peak positions and the Ln–(OH2) bond distances of the lanthanide(III) aqua ions. While the light rare earth ions form nona-hydrates, the heavy ones form octa-hydrates and the rare earth ions in the middle of the series show non integer hydration numbers between 9 and 8. A relationship between wavenumber positions $$\nu_{1}$$ν1 Ln–(OH2) and the Ln–(OH2) bond distances of the RE hydrates has been given. Recent quantum mechanical calculations support the given interpretation.
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23
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Chen H, Shi R, Ow H. Predicting Stability Constants for Terbium(III) Complexes with Dipicolinic Acid and 4-Substituted Dipicolinic Acid Analogues using Density Functional Theory. ACS OMEGA 2019; 4:20665-20671. [PMID: 31858052 PMCID: PMC6906780 DOI: 10.1021/acsomega.9b02851] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
The relative stability constants of Tb(III) complexes exhibiting binding to a series of 4-substituted analogues of dipicolinic acid (2,6-pyridinedicarboxylic acid) (DPA) were calculated using density functional theory (DFT) with the standard thermodynamic cycle. DFT calculations showed that the strengths of the stability constants were modified by the substituents in the following (decreasing) order: -NH2 > -OH ∼ -CH2OH > -imidazole ∼ -Cl ∼ -Br ∼ -H > -F > -I, with the differences among them falling within one to two log units except for -NH2. Through population and structural analysis, we observed that the -NH2, -OH, -CH2OH, and halide substituents can donate electrons via resonance effect to the pyridine ring of DPA while inductively withdrawing electrons with different strengths, thus resulting in the different binding strengths of the 4-substituted DPAs to the Tb(III) ions. We believe that these observations possess utility not only in the ongoing development of luminescent probes for bioanalytical studies but also for more recent cross-industrial efforts to enhance reservoir surveillance capabilities using chemical tracers within the oil and gas sector.
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Affiliation(s)
- Hsieh Chen
- Aramco Services Company, Aramco Research Center—Boston, 400 Technology Square, Cambridge, Massachusetts 02139, United States
| | - Rena Shi
- Aramco Services Company, Aramco Research Center—Boston, 400 Technology Square, Cambridge, Massachusetts 02139, United States
| | - Hooisweng Ow
- Aramco Services Company, Aramco Research Center—Boston, 400 Technology Square, Cambridge, Massachusetts 02139, United States
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24
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Hu F, Hu H, Yang J, Luo Y, Lundstrom M, Ji G, Hu J. Preferential extraction of Ni(II) over Co(II) by arylsulphonic acid in the presence of pyridinecarboxylate ester: Experimental and DFT calculations. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111253] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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25
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Gupta NK, Choudhary BC, Gupta A, Achary S, Sengupta A. Graphene-based adsorbents for the separation of f-metals from waste solutions: A review. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111121] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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26
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de Souza KM, de Carvalho LP, da Silva JA, Longo RL. On the structures of dinuclear symmetric lanthanide complexes and the selectivity towards heterodinuclear complexes based on molecular modeling. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.05.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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27
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Dumpala RMR, Boda A, Kumar P, Rawat N, Ali SM. Reduction in Coordination Number of Eu(III) on Complexation with Pyrazine Mono- and Di-Carboxylates in Aqueous Medium. Inorg Chem 2019; 58:11180-11194. [DOI: 10.1021/acs.inorgchem.9b01772] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
| | - Anil Boda
- Chemical Engineering Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Pranaw Kumar
- Fuel Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Neetika Rawat
- Radioanalytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Sk. Musharaf Ali
- Chemical Engineering Division, Bhabha Atomic Research Centre, Mumbai 400085, India
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28
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Boda A, Ali SM. Scalar Relativistic Density Functional Theoretical Investigation of Higher Complexation Ability of Substituted 1,10-Phenanthroline over Bipyridine Towards Am 3+
/Eu 3+
Ions. Z Anorg Allg Chem 2019. [DOI: 10.1002/zaac.201800487] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anil Boda
- Chemical Engineering Division; Bhabha Atomic Research Centre; 400 085 Mumbai India
| | - Sk. Musharaf Ali
- Chemical Engineering Division; Bhabha Atomic Research Centre; 400 085 Mumbai India
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29
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Lutoshkin MA, Petrov AI, Kuznetsov BN, Kazachenko AS. Aqueous Complexation of Morin and Its Sulfonate Derivative with Lanthanum(III) and Trivalent Lanthanides. J SOLUTION CHEM 2019. [DOI: 10.1007/s10953-019-00877-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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30
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Gupta NK, Gupta A, Ramteke P, Sahoo H, Sengupta A. Biosorption-a green method for the preconcentration of rare earth elements (REEs) from waste solutions: A review. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.10.134] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Janicki R, Mondry A. Structural and thermodynamic aspects of hydration of Gd(iii) systems. Dalton Trans 2019; 48:3380-3391. [DOI: 10.1039/c8dt04869j] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A first systematic experimental study on the thermodynamic description of the hydration equilibrium of Gd(iii) compounds is presented.
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Affiliation(s)
- Rafał Janicki
- University of Wrocław
- Faculty of Chemistry
- 50-383 Wrocław
- Poland
| | - Anna Mondry
- University of Wrocław
- Faculty of Chemistry
- 50-383 Wrocław
- Poland
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32
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Modeling intramolecular energy transfer in lanthanide chelates: A critical review and recent advances. INCLUDING ACTINIDES 2019. [DOI: 10.1016/bs.hpcre.2019.08.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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33
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Ali SM. Role of Ligand Straining in Complexation of Eu 3+-Am 3+ Ions by TPEN and PPDEN, Scalar Relativistic DFT Exploration in Conjunction with COSMO-RS. ACS OMEGA 2018; 3:13104-13116. [PMID: 31458031 PMCID: PMC6644696 DOI: 10.1021/acsomega.8b00933] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 09/28/2018] [Indexed: 06/10/2023]
Abstract
To search for new ligands suitable for the separation of minor actinides (MA) from lanthanides (Ln) in nuclear waste reprocessing, theoretical (density functional theory) studies were carried out on the complexation (structures, bonding, and thermodynamics) of La3+, Sm3+, Eu3+, and Am3+ complexes with moderately soft donor ligands TPEN [N,N,N',N'-tetrakis(2-pyridylmethyl)ethylenediamine] and PPDEN [N,N,N',N″,N″-pentakis(2-pyridylmethyl) diethylenetriamine] in aqueous and nitrobenzene solutions. B3LYP level of theory was used in conjunction with the conductor-like screening model for real systems (COSMO-RS). The metal ions in [M(NO3)2(TPEN)]NO3 and [M(NO3)(PPDEN)](NO3)2 complexes were deca-coordinated with both TPEN and PPDEN. The enthalpy of the complexation with TPEN in an aqueous solution was found to be negative, indicating the exothermic nature of the reaction as observed in the experiments. The calculated values of free energy of complexation follow the experimental trend: Am3+ > Sm3+ > La3+. Furthermore, the calculated free energy with PPDEN is reduced compared to that with TPEN, which may be attributed to the ligand straining during complex formation, which is also reflected in greater residual charges on both the Eu3+ and Am3+ central ions in the complexes of octadentate PPDEN compared to hexadentate TPEN. The experimental complexation selectivity of Am3+ over Eu3+ with TPEN is established by employing COSMO-RS. Furthermore, TPEN is Am3+-selective, whereas PPDEN is Eu3+-selective, which could be exploited for the efficient separation of MA from Ln.
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Kimura T, Kaneko M, Watanabe M, Miyashita S, Nakashima S. Computational chemical analysis of Eu(iii) and Am(iii) complexes with pnictogen-donor ligands using DFT calculations. Dalton Trans 2018; 47:14924-14931. [PMID: 30156260 DOI: 10.1039/c8dt01973h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We demonstrated density functional calculations of Eu(iii) and Am(iii) complexes with pnictogen-donor (X) ligands, (CH3)2X-CH2-CH2-X(CH3)2 (X = N, P, As and Sb). We investigated the optimized structures of the complexes and the Gibbs energy differences in the complex formation reactions. The results indicated that the N- and P-donor ligands exhibit Am(iii) ion selectivity over Eu(iii) ions; especially, the P-donor ligand showed the highest selectivity. The tendency of the Am(iii)/Eu(iii) selectivity by the pnictogen-donor ligands was found to be comparable to that of the soft acid classification in the hard and soft acids and bases rule. Mulliken's spin population analysis indicated that the bonding properties between the metal ion and the pnictogen atoms correlated with the Am(iii)/Eu(iii) selectivity. In particular, the participation of f-orbital electrons of the metal ion in the covalency was indicated to play an important role in the selectivity.
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Affiliation(s)
- Taiki Kimura
- Graduate School of Science, Hiroshima University, Japan
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35
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Behavior of bifunctional phosphonium-based ionic liquids in solvent extraction of rare earth elements - quantum chemical study. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.04.134] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Sun T, Xu C, Xie X, Chen J, Liu X. Quantum Chemistry Study on the Extraction of Trivalent Lanthanide Series by Cyanex301: Insights from Formation of Inner- and Outer-Sphere Complexes. ACS OMEGA 2018; 3:4070-4080. [PMID: 31458643 PMCID: PMC6641625 DOI: 10.1021/acsomega.8b00359] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 04/05/2018] [Indexed: 06/10/2023]
Abstract
The extraction of lanthanide series by Cyanex301, i.e., bis(2,4,4-trimethylpentyl)dithiophosphinic acid (HC301), has been modeled by density functional theory calculation, taking into account the formation of both inner- and outer-sphere complexes. The inner-sphere complex Ln(C301)3 and the outer-sphere complex Ln(H2O)9(C301)3 are optimized, followed by the analysis of interaction energy, bond length, Laplacian bond orders, and Mulliken populations. The covalency degree increases in Ln-S and Ln-O bonds in the inner- and outer-sphere complexes, respectively, as the lanthanide series is traversed. Mulliken population analysis indicates the important role of the 5d-orbital participation in bonding in the formation of inner- and outer-sphere complexes. Two thermodynamic cycles regarding the formation of inner- and outer-sphere complexes are established to calculate the extraction Gibbs free energies (ΔG extr), and relaxed potential energy surface scan is utilized to model the kinetic complexation of C301 anion with hydrated metal ions. Light lanthanides can form both inner- and outer-sphere complexes, whereas heavy lanthanides only form outer-sphere complexes in biphasic extraction. After adopting the data of forming inner-sphere complex for light Ln(III) and that of forming outer-sphere complexes for heavy Ln(III), the trend of the calculated -ΔG extr agrees very well with that of the experimental distribution ratios on crossing the Ln(III) series. Results from this work help to theoretically understand the extraction behavior of Cyanex301 with respect to different Ln(III).
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Affiliation(s)
- Taoxiang Sun
- E-mail: . Phone: 86-10-80194036. Fax: 86-10-62771740 (T.S.)
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37
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Dumpala RMR, Rawat N, Boda A, Ali SM, Tomar BS. Structural, luminescence, thermodynamic and theoretical studies on mononuclear complexes of Eu(III) with pyridine monocarboxylate-N-oxides in aqueous solution. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 190:150-163. [PMID: 28922641 DOI: 10.1016/j.saa.2017.09.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 08/21/2017] [Accepted: 09/08/2017] [Indexed: 06/07/2023]
Abstract
The mononuclear complexes formed by Eu(III) with three isomeric pyridine monocarboxylate-N-oxides namely picolinic acid-N-oxide (PANO), nicotinic acid-N-oxide (NANO) and isonicotinic acid-N-oxide (IANO) in aqueous solutions were studied by potentiometry, luminescence spectroscopy and isothermal titration calorimetry (ITC) to determine the speciation, coordination, luminescence properties and thermodynamic parameters of the complexes formed during the course of the reaction. More stable six membered chelate complexes with stoichiometry (MLi, i=1-4) are formed by Eu(III) with PANO while non chelating ML and ML2 complexes are formed by NANO and IANO. The stability of Eu(III) complexes follow the order PANO>IANO>NANO. The ITC studies inferred an endothermic and innersphere complex formation of Eu(III)-PANO and Eu(III)-IANO whereas an exothermic and outer-sphere complex formation for Eu(III)-NANO. The luminescence life time data further supported the ITC results. Density functional theoretical calculations were carried out to optimize geometries of the complexes and to estimate the energies, structural parameters (bond distances, bond angles) and charges on individual atoms of the same. Theoretical approximations are found to be in good agreement with the experimental observations.
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Affiliation(s)
- Rama Mohana Rao Dumpala
- Radioanalytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Neetika Rawat
- Radioanalytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
| | - Anil Boda
- Chemical Engineering Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Sk Musharaf Ali
- Chemical Engineering Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - B S Tomar
- Radioanalytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
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38
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Correlation between Am(III)/Eu(III) selectivity and covalency in metal–chalcogen bonds using density functional calculations. J Radioanal Nucl Chem 2018. [DOI: 10.1007/s10967-017-5683-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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Wu W, Sun T, Pu N, Meng D, Li Y, Dang J, Yang Y, Chen J, Xu C. Thermodynamic and spectroscopic study on the solvation and complexation behavior of Ln(iii) in ionic liquids: binding of Ln(iii) with CMPO in C4mimNTf2. NEW J CHEM 2018. [DOI: 10.1039/c8nj00344k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thermodynamics of Ln(iii) complexation with CMPO in “dry” and “wet” ionic liquids reflects how solvation of Ln(iii) affects the complexation and helps identify the extractive species involved in solvent extraction.
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Affiliation(s)
- Wenchao Wu
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing
- China
| | - Taoxiang Sun
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing
- China
| | - Ning Pu
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing
- China
| | - Dechao Meng
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing
- China
| | - Youzhen Li
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing
- China
| | - Jiahao Dang
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing
- China
| | - Ying Yang
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum
- Beijing
- China
| | - Jing Chen
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing
- China
| | - Chao Xu
- Collaborative Innovation Center of Advanced Nuclear Energy Technology
- Institute of Nuclear and New Energy Technology
- Tsinghua University
- Beijing
- China
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40
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41
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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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42
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Huang PW, Wang CZ, Chai ZF, Shi WQ. A theoretical study on geometry, bonding nature, and stability of several anhydrous and hydrated In(III), Gd(III) and Yb(III) complexes in liquid scintillator solvents. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.04.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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43
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Cao X, Heinz N, Zhang J, Dolg M. The first water coordination sphere of lanthanide(iii) motexafins (Ln-Motex2+, Ln = La, Gd, Lu) and its effects on structures, reduction potentials and UV-vis absorption spectra. Theoretical studies. Phys Chem Chem Phys 2017; 19:20160-20171. [DOI: 10.1039/c7cp02861j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An explicit treatment of strongly bound water molecules is mandatory to calculate correct UV-vis absorption spectra of lanthanide(iii) motexafins.
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Affiliation(s)
- Xiaoyan Cao
- Institute for Theoretical Chemistry, University of Cologne
- D-50939 Cologne
- Germany
| | - Norah Heinz
- Institute for Theoretical Chemistry, University of Cologne
- D-50939 Cologne
- Germany
| | - Jun Zhang
- Department of Chemistry
- University of Illinois at Urbana Champaign
- Urbana
- USA
| | - Michael Dolg
- Institute for Theoretical Chemistry, University of Cologne
- D-50939 Cologne
- Germany
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44
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Bhattacharyya A, Mohapatra M, Mohapatra PK, Gadly T, Ghosh SK, Manna D, Ghanty TK, Rawat N, Tomar BS. An Insight into the Complexation of Trivalent Americium Vis‐à‐Vis Lanthanides with Bis(1,2,4‐triazinyl)bipyridine Derivatives. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600829] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Neetika Rawat
- Radioanalytical Chemistry Division Bhabha Atomic Research Centre 400085 Trombay, Mumbai India
| | - Bhupendra S. Tomar
- Radioanalytical Chemistry Division Bhabha Atomic Research Centre 400085 Trombay, Mumbai India
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45
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Qiao B, Ferru G, Ellis RJ. Complexation Enhancement Drives Water-to-Oil Ion Transport: A Simulation Study. Chemistry 2016; 23:427-436. [DOI: 10.1002/chem.201604470] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Indexed: 01/14/2023]
Affiliation(s)
- Baofu Qiao
- Chemical Sciences and Engineering Division; Argonne National Laboratory; Argonne Illinois 60439 USA
| | - Geoffroy Ferru
- Chemical Sciences and Engineering Division; Argonne National Laboratory; Argonne Illinois 60439 USA
| | - Ross J. Ellis
- Chemical Sciences and Engineering Division; Argonne National Laboratory; Argonne Illinois 60439 USA
- Chemical Sciences Division; Oak Ridge National Laboratory; Oak Ridge Tennessee 37831 USA
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46
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Fryer-Kanssen I, Austin J, Kerridge A. Topological Study of Bonding in Aquo and Bis(triazinyl)pyridine Complexes of Trivalent Lanthanides and Actinides: Does Covalency Imply Stability? Inorg Chem 2016; 55:10034-10042. [DOI: 10.1021/acs.inorgchem.6b00968] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Izaak Fryer-Kanssen
- Department of Chemistry, Lancaster University, Bailrigg,
Lancaster LA1 4YB, U.K
| | - Jonathan Austin
- National Nuclear Laboratory, Chadwick House, Birchwood Park, Warrington WA3 6AE, U.K
| | - Andrew Kerridge
- Department of Chemistry, Lancaster University, Bailrigg,
Lancaster LA1 4YB, U.K
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47
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Kaneko M, Watanabe M, Matsumura T. The separation mechanism of Am(iii) from Eu(iii) by diglycolamide and nitrilotriacetamide extraction reagents using DFT calculations. Dalton Trans 2016; 45:17530-17537. [DOI: 10.1039/c6dt03002e] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
DFT calculated stabilization energies reproduced the experimental separation behavior of Am3+ from Eu3+ using diglycolamide and nitrilotriacetamide ligands.
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Affiliation(s)
- Masashi Kaneko
- Nuclear Science and Engineering Center
- Japan Atomic Energy Agency
- Japan
| | - Masayuki Watanabe
- Nuclear Science and Engineering Center
- Japan Atomic Energy Agency
- Japan
| | - Tatsuro Matsumura
- Nuclear Science and Engineering Center
- Japan Atomic Energy Agency
- Japan
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48
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Ali SM, Pahan S, Bhattacharyya A, Mohapatra PK. Complexation thermodynamics of diglycolamide with f-elements: solvent extraction and density functional theory analysis. Phys Chem Chem Phys 2016; 18:9816-28. [DOI: 10.1039/c6cp00825a] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Optimized complexes of Lu3+ with TMDGA in 1 : 1, 1 : 2 and 1 : 3 stoichiometric ratios and plots of theoretically calculated stepwise binding energy.
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Affiliation(s)
- Sk. M. Ali
- Chemical Engineering Division
- Bhabha Atomic Research Centre
- Trombay
- India
| | - S. Pahan
- Process Developement Division
- Bhabha Atomic Research Centre
- Trombay
- India
| | - A. Bhattacharyya
- Radiochemistry Division Bhabha Atomic Research Centre
- Trombay
- India
| | - P. K. Mohapatra
- Radiochemistry Division Bhabha Atomic Research Centre
- Trombay
- India
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49
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Bodo E, Macaluso V, Spezia R. Solvent Structure around Lanthanoid(III) Ions in Liquid DMSO As Revealed by Polarizable Molecular Dynamics Simulations. J Phys Chem B 2015; 119:13347-57. [DOI: 10.1021/acs.jpcb.5b06317] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Enrico Bodo
- Department
of Chemistry, University of Rome “La Sapienza”, Rome, Italy
| | - Veronica Macaluso
- Department
of Chemistry, University of Rome “La Sapienza”, Rome, Italy
| | - Riccardo Spezia
- LAMBE
CNRS UMR8587, Universite dEvry val dEssonne, Blvd F. Mitterrand, Bat̂ Maupertuis, 91025 Evry, France
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50
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Kaneko M, Miyashita S, Nakashima S. Bonding Study on the Chemical Separation of Am(III) from Eu(III) by S-, N-, and O-Donor Ligands by Means of All-Electron ZORA-DFT Calculation. Inorg Chem 2015; 54:7103-9. [DOI: 10.1021/acs.inorgchem.5b01204] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Masashi Kaneko
- Department
of Chemistry, Graduate School of Science and ‡Natural Science Center for Basic
Research and Development, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Sunao Miyashita
- Department
of Chemistry, Graduate School of Science and ‡Natural Science Center for Basic
Research and Development, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Satoru Nakashima
- Department
of Chemistry, Graduate School of Science and ‡Natural Science Center for Basic
Research and Development, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
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