A Novel Solvent System Involving Terpyridine and Cyanex-301 for Am(III) and Eu(III) Separation from Weakly Acidic Feeds

Bhattacharyya, Arunasis; Mohapatra, P. Κ.

doi:10.1080/01496395.2014.940542

Cited by 3 publications

(2 citation statements)

References 26 publications

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“…For such an extraction, the choice of an organic ligand is of primary importance and chelate polydentate nitrogen ligands are expected to be efficient for Np(V) coordination and extraction. One of the prospective ligands explored in actinide coordination chemistry is 2,2′:6′,2″-terpyridine (Terpy). − …”

Section: Introductionmentioning

confidence: 99%

Neptunium(V) Isothiocyanate Complexes with 4′-Aryl-Substituted 2,2′:6′,2″-Terpyridines and N,N-Dimethylacetamide as Molecular Ligands

et al. 2021

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New complexes of neptunyl(V) isothiocyanate with 4′-aryl-substituted 2,2′:6′,2″-terpyridines (Terpy) and N,N-dimethylacetamide (DMA) were obtained: [(NpO2)(4′-Ph-Terpy)(DMA)(NCS)]·DMA, [(NpO2)(4′-(4-(CF3)C6H4)-Terpy)(DMA)(NCS)]·2H2O·DMA, [(NpO2)(4′-(3-BrC6H4)-Terpy)(DMA)(NCS)]·DMA, and [(NpO2)(4′-(2-(COOH)C6H4)-Terpy)(DMA)(NCS)]·DMA. The structures of the compounds were determined with X-ray diffraction analysis. The neptunium coordination polyhedra were found to be pentagonal bipyramids with O atoms of the NpO2 groups in the apical positions and the equatorial planes formed by three N atoms of the terpyridine ligand, a N atom of the isothiocyanate anion, and an O atom of DMA. The influence of the substituents of the Ar group on the crystal structure is discussed. The IR spectra contain well-resolved bands of characteristic vibrations of all groups in the complex. The electronic absorption spectra are typical for neptunium(V) complexes and contain an intense narrow absorption band belonging to an f–f transition with a maximum of 988 nm and several long-wave satellites of lower intensity. The substituted terpyridines were shown to be efficient for the extraction of various valence forms of neptunium from the isothiocyanate solutions.

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Section: Introductionmentioning

confidence: 99%

Neptunium(V) Isothiocyanate Complexes with 4′-Aryl-Substituted 2,2′:6′,2″-Terpyridines and N,N-Dimethylacetamide as Molecular Ligands

et al. 2021

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“…The inclusion of the polydentate feature from one or more ligands has been applied in diverse fields such as chemical recognition, 31 material separation, 32 and anticancer medicine. 33 The multidentate chelating often involves a coordination of two or more atoms, including nitrogen, oxygen, and sulfur.…”

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confidence: 99%

Facile Synthesis of Fluorescent Conjugated Polyelectrolytes Using Polydentate Sulfonate as Highly Selective and Sensitive Copper(II) Sensors

Chen

Tong

et al. 2017

ACS Sens.

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Fluorescent conjugated polyelectrolytes represent an exciting area of research into new chemosensors. By virtue of their rapid electron and energy transfer paths, these highly correlated, one-dimensional systems have been depicted as "molecular wires" and show "million-fold" sensitivity compared to monomolecular sensor analogs. In this paper, a novel polyelectrolyte sensor, the ttp-PPESO, has been designed by incorporating terpyridine and sulfonate functional groups into the polyelectrolyte. This specifically tailored sensor has displayed remarkable quenching response toward copper(II) with a detection limit of 14.7 nM (0.93 ppb). It is capable of selectively screening copper without interference from 12 common cations. Molecular modeling suggests that binding occurs through a coordination interaction of the terpyridine and sulfonate. The additional multidentate nature from the sulfonate offers extraordinary chelating ability to the analyte. We anticipate that this unique binding mode will provide insight for the design of future more sensitive and selective systems.

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Separation of Am³⁺ and Eu³⁺ using hexa-n-octylnitrilo triacetamide (HONTA): complexation, extraction, luminescence, EXAFS and DFT studies

et al. 2017

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This paper reports the solvent extraction of Am and Eu using N,N,N',N',N'',N''-hexa-n-octylnitrilotriacetamide (HONTA) as the extractant in n-dodecane. The results are in variance with those reported previously with respect to the nature of the extracted species. The solvent extraction data were entirely different from those reported previously as the extracted species conformed to 1 : 2 (M : L) species for both Am and Eu ions. The structure of the extracted complex was determined by EXAFS demonstrating the three amidic 'O' atoms of the HONTA complex with the Eu ion. In the case of the Am ion, the pivotal 'N' atom is suggested to bond to the metal ion, which may explain the significantly more favourable extraction of Amvis-à-vis Eu. The absence of HO molecules in the inner coordination sphere of the Eu-HONTA extract was confirmed by luminescence spectroscopic measurements. Complexation studies in MeOH and EtOH indicated the formation of both 1 : 1 and 1 : 2 complexes with Nd ions. The results are explained on the basis of DFT calculations using HMNTA, the corresponding hexamethyl analogue of HONTA.

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A Novel Solvent System Involving Terpyridine and Cyanex-301 for Am(III) and Eu(III) Separation from Weakly Acidic Feeds

Cited by 3 publications

References 26 publications

Neptunium(V) Isothiocyanate Complexes with 4′-Aryl-Substituted 2,2′:6′,2″-Terpyridines and N,N-Dimethylacetamide as Molecular Ligands

Neptunium(V) Isothiocyanate Complexes with 4′-Aryl-Substituted 2,2′:6′,2″-Terpyridines and N,N-Dimethylacetamide as Molecular Ligands

Facile Synthesis of Fluorescent Conjugated Polyelectrolytes Using Polydentate Sulfonate as Highly Selective and Sensitive Copper(II) Sensors

Separation of Am³⁺ and Eu³⁺ using hexa-n-octylnitrilo triacetamide (HONTA): complexation, extraction, luminescence, EXAFS and DFT studies

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A Novel Solvent System Involving Terpyridine and Cyanex-301 for Am(III) and Eu(III) Separation from Weakly Acidic Feeds

Cited by 3 publications

References 26 publications

Neptunium(V) Isothiocyanate Complexes with 4′-Aryl-Substituted 2,2′:6′,2″-Terpyridines and N,N-Dimethylacetamide as Molecular Ligands

Neptunium(V) Isothiocyanate Complexes with 4′-Aryl-Substituted 2,2′:6′,2″-Terpyridines and N,N-Dimethylacetamide as Molecular Ligands

Facile Synthesis of Fluorescent Conjugated Polyelectrolytes Using Polydentate Sulfonate as Highly Selective and Sensitive Copper(II) Sensors

Separation of Am3+ and Eu3+ using hexa-n-octylnitrilo triacetamide (HONTA): complexation, extraction, luminescence, EXAFS and DFT studies

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Separation of Am³⁺ and Eu³⁺ using hexa-n-octylnitrilo triacetamide (HONTA): complexation, extraction, luminescence, EXAFS and DFT studies