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Sengupta A, Goyal P, Prava Mantry S, Sundararajan M, Kumar Verma P, Kumar Mohapatra P. Remarkably High Separation of Neodymium from Praseodymium by Selective Dissolution from their Oxide Mixture using an Ionic Liquid Containing aβ-Diketone. Chemistry 2024; 30:e202303923. [PMID: 38314903 DOI: 10.1002/chem.202303923] [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: 11/25/2023] [Revised: 01/29/2024] [Accepted: 01/31/2024] [Indexed: 02/07/2024]
Abstract
A simple, efficient, direct and economical method for the mutual separation of Nd and Pr was developed by the selective dissolution of Nd2O3 from their oxide mixtures in an ionic liquid containing 2-thenoyltrifluoroacetone (HTTA) resulting in an unprecedented separation factor (βNd/Pr)>500, which is 277 times more than the thus far reported βNd/Pr values. The proposed mechanism was supported by DFT computations.
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Affiliation(s)
- Arijit Sengupta
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
- Homi Bhabha National Institute, Mumbai, 400085, India
| | - Priya Goyal
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Swarna Prava Mantry
- Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Mahesh Sundararajan
- Homi Bhabha National Institute, Mumbai, 400085, India
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Parveen Kumar Verma
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
| | - Prasanta Kumar Mohapatra
- Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
- Homi Bhabha National Institute, Mumbai, 400085, India
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Unger AJ, Jensen MP. Room-Temperature Ionic Liquid Cation Effects on the Structure and Stability of Anionic Lanthanide Complexes. Inorg Chem 2023; 62:5553-5564. [PMID: 36976891 DOI: 10.1021/acs.inorgchem.3c00050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
Room-temperature ionic liquids (RTILs) are a subset of molten salts that are liquids at room temperature and may offer an elegant, low-temperature route to predicting the properties of solvated metal complexes in their high-temperature analogues. This work studied the chemistry of chloride anion-containing RTILs to determine their similarity to inorganic molten chloride salts. The behaviors of complexes of Mn, Nd, and Eu were evaluated in a variety of chloride RTILs by absorption spectrophotometry and electrochemistry to elucidate trends in cation effects on the coordination geometry and redox properties of the solvated species. Spectrophotometric data indicated the metals are present as anionic complex (e.g., MnCl42- and NdCl63-) analogous to those observed in molten chloride salts. Strongly polarizing, charge-dense RTIL cations induced distortions to the symmetry of these complexes, resulting in lower oscillator strengths and red-shifted energies for the observed transitions. Cyclic voltammetry experiments were used to characterize the Eu(III/II) redox couple producing diffusion coefficients on the order of 10-8 cm2 s-1 and heterogeneous electron transfer rate constants ranging between 6 × 10-5 and 2 × 10-4 cm s-1. The E1/2 potentials for Eu(III/II) were also found to shift positively with increasing cation polarization power, stabilizing the Eu(II) oxidation state by removing electron density from the metal center over chloride bond networks. Both the optical spectrophotometry and electrochemistry results suggest that the polarization strength of an RTIL cation plays a major role in the geometry and stability of a metal complex.
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Higgins CJ, Luebke KI, Poineau F, Czerwinski KR, Hatchett DW. Direct dissolution and spectroscopic characterization of uranium hexafluoride in ionic liquid. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08543-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Studies toward the Use of Ionic Liquids and Supercritical CO2 for the Recovery and Separation of Praseodymium from Waste Streams. Catalysts 2022. [DOI: 10.3390/catal12030335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Waste streams from the incineration of metal-containing materials like such as computer processor boards and batteries may contain critical rare earth elements like praseodymium. Data on the solubility of Pr compounds and on their distribution coefficients in supercritical CO2/ionic liquid two-phase systems are important to determine if an ionic liquid/supercritical CO2 two-phase approach is feasible toward the recovery of a particular metal. This work provides data on the solubility of various praseodymium compounds in butyl-methyl-pyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPyTf2N) ionic liquid and on the distribution coefficients of these praseodymium compounds in the supercritical CO2 phase of the two-phase BMPyTf2N ionic liquid/supercritical CO2 system, with and without a tributyl phosphate additive.
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Abstract
Rare earth elements (REEs) are becoming more and more significant as they play crucial roles in many advanced technologies. Therefore, the development of optimized processes for their recovery, whether from primary resources or from secondary sources, has become necessary, including recovery from mine tailings, recycling of end-of-life products and urban and industrial waste. Ionic solvents, including ionic liquids (ILs) and deep-eutectic solvents (DESs), have attracted much attention since they represent an alternative to conventional processes for metal recovery. These systems are used as reactive agents in leaching and extraction processes. The most significant studies reported in the last decade regarding the recovery of REEs are presented in this review.
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Ehrenburg MR, Molodkina EB, Mishchenko A, Rudnev AV. The promoting effect of water on the electrodeposition of Eu in a dicyanamide ionic liquid. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138169] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Hua L, Li W, Chen Y, Liang K, Cai H, Wang J, Wang S, Yin T, Liang L. A hexanuclear Nd (III) complex derived from a Schiff base with significant antitumor and antifungal activity. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lijuan Hua
- Department of Chemistry Bengbu Medical College Bengbu China
| | - Wenge Li
- Department of Chemistry Bengbu Medical College Bengbu China
| | - Yan Chen
- Department of Chemistry Bengbu Medical College Bengbu China
| | - Kai Liang
- Department of Chemistry Bengbu Medical College Bengbu China
| | - He Cai
- Department of Chemistry Bengbu Medical College Bengbu China
| | - Jing Wang
- Department of Chemistry Bengbu Medical College Bengbu China
| | - Siyu Wang
- Department of Chemistry Bengbu Medical College Bengbu China
| | - Tianyue Yin
- Department of Chemistry Bengbu Medical College Bengbu China
| | - Lili Liang
- Department of Chemistry Bengbu Medical College Bengbu China
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Rudnev AV. Electrodeposition of lanthanides from ionic liquids and deep eutectic solvents. RUSSIAN CHEMICAL REVIEWS 2020. [DOI: 10.1070/rcr4970] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Lanthanides belong to the most important raw materials and are highly demanded in high-tech industry. Low-temperature electrochemical deposition of lanthanides and lanthanide-based alloys for recycling and obtaining functional materials can provide a real alternative to the currently used high-temperature electrolysis of molten salts. The review summarizes the advancements in the field of electrodeposition of lanthanides from organic ionic systems, such as ionic liquids and deep eutectic solvents. The growing interest in these ionic systems is due to their excellent physicochemical properties, in particular non-volatility, thermal and electrochemical stability. The review also discusses further prospects and potential of the electrochemical approach for obtaining lanthanide-containing advanced materials.
The bibliography includes 219 references.
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Bengio D, Dumas T, Arpigny S, Husar R, Mendes E, Solari PL, Schlegel ML, Schlegel D, Pellet-Rostaing S, Moisy P. Electrochemical and Spectroscopic Study of Eu III and Eu II Coordination in the 1-Ethyl-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide Ionic Liquid. Chemistry 2020; 26:14385-14396. [PMID: 32529746 DOI: 10.1002/chem.202001469] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 06/05/2020] [Indexed: 11/09/2022]
Abstract
Separation processes based on room temperature ionic liquids (RTIL) and electrochemical refining are promising strategies for the recovery of lanthanides from primary ores and electronic waste. However, they require the speciation of dissolved elements to be known with accuracy. In the present study, Eu coordination and EuIII /EuII electrochemical behavior as a function of water content in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIm][NTf2 ]) was investigated using UV-visible spectrophotometry, time-resolved laser fluorescence spectroscopy, electrochemistry, and X-ray absorption spectroscopy. In situ measurements were performed in spectroelectrochemical cells. Under anhydrous conditions, EuIII and EuII were complexed by NTf2 , forming Eu-O and Eu-(N,O) bonds with the anion sulfoxide function and N atoms, respectively. This complexation resulted in a greater stability of EuII , and in quasi-reversible oxidation-reduction with an E0 ' potential of 0.18 V versus the ferrocenium/ferrocene (Fc+ /Fc) couple. Upon increasing water content, progressive incorporation of water in the EuIII coordination sphere occurred. This led to reversible oxidation-reduction reactions, but also to a decrease in stability of the +II oxidation state (E0 '=-0.45 V vs. Fc+ /Fc in RTIL containing 1300 mm water).
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Affiliation(s)
- David Bengio
- CEA, DES, ISEC, DMRC, Univ Montpellier, Site de Marcoule, 30207, Bagnols-sur-Cèze, France
| | - Thomas Dumas
- CEA, DES, ISEC, DMRC, Univ Montpellier, Site de Marcoule, 30207, Bagnols-sur-Cèze, France
| | - Sylvie Arpigny
- CEA, DES, ISEC, DMRC, Univ Montpellier, Site de Marcoule, 30207, Bagnols-sur-Cèze, France
| | - Richard Husar
- CEA, DES, ISEC, DMRC, Univ Montpellier, Site de Marcoule, 30207, Bagnols-sur-Cèze, France
| | - Eric Mendes
- CEA, DES, ISEC, DMRC, Univ Montpellier, Site de Marcoule, 30207, Bagnols-sur-Cèze, France
| | - Pier Lorenzo Solari
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin BP 48, 91190, Gif-sur-Yvette, France
| | - Michel L Schlegel
- CEA, Service d'Études Analytiques et de Réactivité des Surfaces, Université Paris-Saclay, 91191, Gif-sur-Yvette, France
| | - Daniel Schlegel
- ESTA-École Supérieure des Technologies et des Affaires, 90004, Belfort Cedex, France
| | | | - Philippe Moisy
- CEA, DES, ISEC, DMRC, Univ Montpellier, Site de Marcoule, 30207, Bagnols-sur-Cèze, France
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Preparation of octahedral Cu(II), Co(II), Ni(II) and Zn(II) complexes derived from 8-formyl-7-hydroxy-4-methylcoumarin: Synthesis, characterization and biological study. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128659] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Zhang B, Shi Z, Shen L, Liu X, Xu J, Wang Z. Low-temperature electrochemical codeposition of aluminum-neodymium alloy in a highly stable solvate ionic liquid. J Solid State Electrochem 2019. [DOI: 10.1007/s10008-019-04293-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Sanchez-Cupido L, Pringle JM, Siriwardana AL, Unzurrunzaga A, Hilder M, Forsyth M, Pozo-Gonzalo C. Water-Facilitated Electrodeposition of Neodymium in a Phosphonium-Based Ionic Liquid. J Phys Chem Lett 2019; 10:289-294. [PMID: 30620201 DOI: 10.1021/acs.jpclett.8b03203] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Rare-earth metals are considered critical metals due to their extensive use in energy-related applications such as wind turbines and nickel-metal hybrid batteries found in hybrid electrical vehicles. A key drawback of the current processing methods includes the generation of large amounts of toxic and radioactive waste. Thus the efficient recovery of these valuable metals as well as cleaner processing methods are becoming increasingly important. Here we report on a clean electrochemical route for neodymium (Nd) recovery from [P6,6,6,14][TFSI], trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)amide which is amplified three times by the presence of water, as evidenced by the cathodic current density and thicker deposits. The role of Nd salt concentrations and water content as an additive in the electrochemistry of Nd3+ in [P6,6,6,14][TFSI] has been studied. The presence of metallic neodymium in the deposits has been confirmed by X-ray photoelectron spectroscopy.
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Affiliation(s)
- Laura Sanchez-Cupido
- Fundación Tecnalia Research and Innovation , Paseo Mikeletegi 2 , 20009 San Sebastián , Spain
| | - Jennifer M Pringle
- Institute for Frontier Materials , Deakin University , Melbourne , Victoria 3125 , Australia
| | - Amal L Siriwardana
- Fundación Tecnalia Research and Innovation , Paseo Mikeletegi 2 , 20009 San Sebastián , Spain
| | - Ainhoa Unzurrunzaga
- Fundación Tecnalia Research and Innovation , Paseo Mikeletegi 2 , 20009 San Sebastián , Spain
| | - Matthias Hilder
- Institute for Frontier Materials , Deakin University , Melbourne , Victoria 3125 , Australia
| | - Maria Forsyth
- Institute for Frontier Materials , Deakin University , Melbourne , Victoria 3125 , Australia
| | - Cristina Pozo-Gonzalo
- Institute for Frontier Materials , Deakin University , Melbourne , Victoria 3125 , Australia
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Bengio D, Mendes E, Pellet-Rostaing S, Moisy P. Electrochemical behavior of platinum and gold electrodes in the aprotic ionic liquid N,N-Trimethylbutylammonium Bis(trifluoromethanesulfonyl)imide. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.06.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Alvarez-Vicente J, Dandil S, Banerjee D, Gunaratne HN, Gray S, Felton S, Srinivasan G, Kaczmarek AM, Van Deun R, Nockemann P. Easily Accessible Rare-Earth-Containing Phosphonium Room-Temperature Ionic Liquids: EXAFS, Luminescence, and Magnetic Properties. J Phys Chem B 2016; 120:5301-11. [DOI: 10.1021/acs.jpcb.6b03870] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jorge Alvarez-Vicente
- School
of Chemistry and Chemical Engineering, The QUILL Research Centre,
David Keir Building, Queen’s University Belfast, Stranmillis
Road, Belfast BT9 5AG, United Kingdom
| | - Sahra Dandil
- School
of Chemistry and Chemical Engineering, The QUILL Research Centre,
David Keir Building, Queen’s University Belfast, Stranmillis
Road, Belfast BT9 5AG, United Kingdom
| | - Dipanjan Banerjee
- Dutch-Belgian
Beamline (DUBBLE), ESRF - The European Synchrotron, CS 40220, 38043 Grenoble Cedex 9, France
| | - H.Q. Nimal Gunaratne
- School
of Chemistry and Chemical Engineering, The QUILL Research Centre,
David Keir Building, Queen’s University Belfast, Stranmillis
Road, Belfast BT9 5AG, United Kingdom
| | - Suzanne Gray
- Centre
for Nanostructured Media, School of Mathematics and Physics, Queen’s University Belfast, Belfast BT7 1NN, United Kingdom
| | - Solveig Felton
- Centre
for Nanostructured Media, School of Mathematics and Physics, Queen’s University Belfast, Belfast BT7 1NN, United Kingdom
| | - Geetha Srinivasan
- School
of Chemistry and Chemical Engineering, The QUILL Research Centre,
David Keir Building, Queen’s University Belfast, Stranmillis
Road, Belfast BT9 5AG, United Kingdom
| | - Anna M. Kaczmarek
- L3 − Luminescent Lanthanide
Lab, Department of Inorganic
and Physical Chemistry, Ghent University, Krijgslaan 281-S3, B-9000 Ghent, Belgium
| | - Rik Van Deun
- L3 − Luminescent Lanthanide
Lab, Department of Inorganic
and Physical Chemistry, Ghent University, Krijgslaan 281-S3, B-9000 Ghent, Belgium
| | - Peter Nockemann
- School
of Chemistry and Chemical Engineering, The QUILL Research Centre,
David Keir Building, Queen’s University Belfast, Stranmillis
Road, Belfast BT9 5AG, United Kingdom
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Anodic behavior of neodymium in acidic AlCl3-1-ethyl-3-methyl-imidazolium chloride ionic liquid. J RARE EARTH 2015. [DOI: 10.1016/s1002-0721(14)60484-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Rama R, Rout A, Venkatesan KA, Antony MP, Vasudeva Rao PR. Extraction behavior of americium (III) in benzoylpyrazolone dissolved in pyrrolidinium based ionic liquid. SEP SCI TECHNOL 2015. [DOI: 10.1080/01496395.2015.1050109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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He L, Ji SP, Tang N, Zhao Y, Tao GH. Synthesis, structure and near-infrared photoluminescence of hexanitratoneodymate ionic liquids. Dalton Trans 2015; 44:2325-32. [PMID: 25534015 DOI: 10.1039/c4dt03294b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Five hexanitratoneodymate-based rare earth complexes () were synthesized using a straightforward method. Purple plate crystals of were isolated and the crystal structure was determined by single-crystal X-ray diffraction with respect to the coordination mode of the nitrate anion to the central Nd(iii) ion. (: monoclinic system P21/c, a = 15.9460(3) Å, b = 10.2457(6) Å, c = 33.323(3) Å, β = 91.8108(17)°, V = 3109.11(11) Å(3), Z = 4). The central Nd(iii) ion is surrounded by six bidentate nitrate ligands, with a major trend towards high symmetry of the [Nd(NO3)6](3-) anion as an icosahedron. Thermal properties were determined from differential scanning calorimetry (DSC) combined with thermogravimetric analysis (TGA) tests. Complexes are found to be room temperature liquids, and their excitation and emission spectra were recorded. These complexes exhibit intense near-infrared (NIR) luminescence emission, which originates from interconfigurational f-f transitions (4)F3/2→(4)IJ multiplet (J = 9/2-13/2). These liquid Nd(iii) complexes are of interest as potential NIR luminescent soft materials with high thermal stability.
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Affiliation(s)
- Ling He
- College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China.
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