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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: 0.5] [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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Rajani P, Sachin AR, Nagarajan S, Brahmananda Rao CVS, Gopakumar G. Insights into the Coordination Behavior of Methyl-Substituted Phosphinic Acids with Actinides. Inorg Chem 2022; 61:13047-13057. [PMID: 35942987 DOI: 10.1021/acs.inorgchem.2c01287] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The electronic structure and complexation behavior of methyl-substituted phosphinic acids with U(VI) and Pu(IV) were explored by applying quantum chemical methods. In contrast to Ingold's classification, our results indicate that the methyl group is electron-withdrawing, reducing the phosphoryl group electron density in substituted phosphinic acids. The magnitude of the computed complexation energy values increases along with the series, PA → MPA → DMPA, and MP → MMP → MDMP, implying an increasing complexation tendency upon methyl group substitution for both U(VI) and Pu(IV) complexes. One of the nitrate groups in UO2(NO3)2•2L complexes (L = PA, MPA, and DMPA) is in monodentate coordination mode due to the additional stability gained from O2N-O···H hydrogen bonding interactions with the acidic H atoms of respective ligands. The calculation indicates marginally stronger metal-ligand interactions in Pu(IV) complexes compared to that in U(VI), which is supported by the computed complexation energies, M-OP bond lengths, ν(P═O), the extent of metal-ligand charge transfer, and properties of M-OP bond critical points. The energy landscape of substituted phosphinic acid ligands is further analyzed within the framework of the activation strain model to explain the energetic preference of certain conformers.
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Affiliation(s)
- Puchakayala Rajani
- Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu 603102, India.,Homi Bhabha National Institute, Training School Complex, Anushakthinagar, Mumbai 400094, India
| | - Aditya Ramesh Sachin
- Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu 603102, India.,Homi Bhabha National Institute, Training School Complex, Anushakthinagar, Mumbai 400094, India
| | - Sivaraman Nagarajan
- Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu 603102, India.,Homi Bhabha National Institute, Training School Complex, Anushakthinagar, Mumbai 400094, India
| | - Cherukuri Venkata Siva Brahmananda Rao
- Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu 603102, India.,Homi Bhabha National Institute, Training School Complex, Anushakthinagar, Mumbai 400094, India
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Brand A, Schulz S, Hepp A, Weigand JJ, Uhl W. Sterically constrained tricyclic phosphine: redox behaviour, reductive and oxidative cleavage of P-C bonds, generation of a dilithium phosphaindole as a promising synthon in phosphine chemistry. Chem Sci 2021; 12:3460-3474. [PMID: 34163619 PMCID: PMC8179454 DOI: 10.1039/d0sc06155g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Accepted: 01/16/2021] [Indexed: 01/09/2023] Open
Abstract
The redox behaviour of sterically constrained tricyclic phosphine 3a was investigated by spectroelectrochemistry. The data suggested a highly negative reduction potential with the reversible formation of a dianionic species. Accordingly, 3a reacted with two equivalents of Li/naphthalene by reductive cleavage of a P-C bond of one of the PC4 heterocycles. The resulting dilithium compound 5 represents a phosphaindole derivative with annulated aromatic C6 and PC4 rings. It is an interesting starting material for the synthesis of new heterocyclic molecules, as was shown by treatment with Me2SiCl2 and PhPCl2. The structures of the products (6 and 7) formally reflect ring expansion by insertion of silylen or phosphinidene fragments into a P-C bond of 3a. Treatment of 3a with H2O2 did not result in the usually observed transfer of a single O atom to phosphorus, but oxidative cleavage of a strained PC4 ring afforded a bicyclic phosphinic acid, R2PO2H.
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Affiliation(s)
- Alexander Brand
- Institut für Anorganische und Analytische Chemie der Universität Münster Corrensstraße 30 D-48149 Münster Germany
| | - Stephen Schulz
- Anorganische Molekülchemie, Fakultät für Chemie und Lebensmittelchemie, Technische-Universität Dresden D-01069 Dresden Germany
| | - Alexander Hepp
- Institut für Anorganische und Analytische Chemie der Universität Münster Corrensstraße 30 D-48149 Münster Germany
| | - Jan J Weigand
- Anorganische Molekülchemie, Fakultät für Chemie und Lebensmittelchemie, Technische-Universität Dresden D-01069 Dresden Germany
| | - Werner Uhl
- Institut für Anorganische und Analytische Chemie der Universität Münster Corrensstraße 30 D-48149 Münster Germany
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Das D, Sivaramakrishna A, Brahmmananda Rao CVS, Sivaraman N, Vijayakrishna K. Phosphoramidate-functionalized Merrifield resin: synthesis and application in actinide separation. POLYM INT 2018. [DOI: 10.1002/pi.5513] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Dhrubajyoti Das
- Department of Chemistry; VIT University; Vellore Tamil Nadu India
| | | | | | - N Sivaraman
- Indira Gandhi Centre for Atomic Research; HBNI; Kalpakkam Tamil Nadu India
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5
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Annam S, Gopakumar G, Brahmmananda Rao C, Sivaraman N, Sivaramakrishna A, Vijayakrishna K. Trihexyl phosphate to trihexyl phosphine oxide: Diverse effect on extraction behavior of actinides. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.02.063] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Annam S, Gopakumar G, Brahmmananda Rao C, Sivaraman N, Sivaramakrishna A, Vijayakrishna K. Extraction of actinides by Tri-n-butyl phosphate derivatives: Effect of substituents. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.07.048] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Das D, Gopakumar G, Brahmmananda Rao CVS, Sivaraman N, Sivaramakrishna A, Vijayakrishna K. Extraction and coordination behavior of diphenyl hydrogen phosphine oxide towards actinides. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1387653] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Dhrubajyoti Das
- Department of Chemistry, School of Advanced Sciences, VIT University, Vellore, India
| | | | | | - N. Sivaraman
- Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam, India
| | | | - Kari Vijayakrishna
- Department of Chemistry, School of Advanced Sciences, VIT University, Vellore, India
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Veerashekhar Goud E, Sivaramakrishna A, Vijayakrishna K, Brahmmananda Rao C, Khedkar VM, Jha PC. Synthesis, structure and DNA interaction studies of bisphosphoramides: Theoretical and experimental insights. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.02.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Liang H, Chen Q, Ma J, Huang Y, Shen X. Synthesis and characterization of a new ion-imprinted polymer for the selective separation of thorium(iv) ions at high acidity. RSC Adv 2017. [DOI: 10.1039/c7ra05061e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new ion-imprinted polymer (IIP), which was synthesized with bis(2-methacryloxyethyl) phosphate as functional ligand and Th4+ as a template ion, can be used in high acidity environment.
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Affiliation(s)
- Hele Liang
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Fundamental Science on Radiochemistry and Radiation Chemistry Laboratory
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Peking University
| | - Qingde Chen
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Fundamental Science on Radiochemistry and Radiation Chemistry Laboratory
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Peking University
| | - Jingyuan Ma
- Shanghai Synchrotron Radiation Facility
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai 201800
- P. R. China
| | - Yuying Huang
- Shanghai Synchrotron Radiation Facility
- Shanghai Institute of Applied Physics
- Chinese Academy of Sciences
- Shanghai 201800
- P. R. China
| | - Xinghai Shen
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Fundamental Science on Radiochemistry and Radiation Chemistry Laboratory
- Department of Applied Chemistry
- College of Chemistry and Molecular Engineering
- Peking University
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