Understanding the complexation of the Eu3+ ion with TODGA, CMPO, TOPO and DMDBTDMA: Extraction, luminescence and theoretical investigation

Sengupta, Arijit; Ali, Sk. Musharaf; Shenoy, K.T.

doi:10.1016/j.poly.2016.06.037

Cited by 29 publications

(14 citation statements)

References 88 publications

(90 reference statements)

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“…The use of B3LYP/SVP level of , and Th (14s13p10d8f1g)/[10s9p5d4f1 g]) for energetics has been reported earlier for actinide-lanthanide complexes as the thermodynamic parameters can be well predicted using B3LYP/TZVP level of theory [74][75][76][77][78][79][80]. The gas phase optimized geometries were used for the single point energy calculation in COSMO phase [74][75][76][77][78][79][80][83][84][85][86][87][88][89]. The aqueous solvent effects in the energetic were incorporated using conductor like screening model (COSMO) approach [81,82].…”

Section: Computational Protocolmentioning

confidence: 85%

Complexation of thorium with pyridine monocarboxylate-N-oxides: Thermodynamic and computational studies

Dumpala

Rawat

Boda

et al. 2018

The Journal of Chemical Thermodynamics

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a b s t r a c tThe feed wastes and waste water treatment plants are the major sources for the entry of N-oxides into the soils then to aquatic life. The complexation of actinides with potentially stable anthropogenic ligands facilitate the transportation and migration of the actinides from the source confinement. The present study describes the determination of thermodynamic parameters for the complexation of Th(IV) with the three isomeric pyridine monocarboxylates (PCNO) namely picolinic acid-N-oxide (PANO), nicotinic acid-N-oxide (NANO) and isonicotinic acid-N-oxide (IANO). The potentiometric and isothermal calorimetric titrations were carried out to determine the stability and enthalpy of the formations for all the Th(IV)-PCNO complexes. Th-PANO complexes are more stable than Th-NANO and Th-IANO complexes which can be attributed to chelate formation in the former complexes. Formation of all the Th-PCNO complexes are endothermic and are entropy driven. The geometries for all the predicted complexes are optimized the energies, bond distances and charges on individual atoms are obtained using TURBOMOLE software. The theoretical calculation corroborated the experimental determinations.

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Section: Computational Protocolmentioning

confidence: 85%

Complexation of thorium with pyridine monocarboxylate-N-oxides: Thermodynamic and computational studies

Dumpala

Rawat

Boda

et al. 2018

The Journal of Chemical Thermodynamics

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“…2 illustrates that the maximal removal of Eu(III) was observed in the solutions with high nitric acid content. Authors of the publication [30] demonstrate decrease in the removal rate with increase in HNO 3 concentration and relate this phenomenon to competition between Eu(III) and H + ions. In our work such effect was not observed.…”

Section: Figure 2 Acidity Effect On Removal Rate Of Eu(iii)mentioning

confidence: 97%

“…Previously, complex formation between Eu(III) and TODGA was studied. It has been concluded that it most probably occurs according to the following scheme [30]:…”

Section: Figure 2 Acidity Effect On Removal Rate Of Eu(iii)mentioning

confidence: 99%

Sorption properties of polymeric beads and films containing tetraoctyl diglycolamide towards europium (III) ions

2020

Chemical Series

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The article presents results obtained during investigation of Eu(III) ion removal from aqueous solutions using triacetate cellulose films and styrene-divinylbenzene copolymer beads containing tetraoctyl diglycolamide (TODGA). A simple method for manufacturing films containing up to 50 % w/w TODGA is provided. Solution acidity effect on the removal rate of Eu(III) ions was studied. Maximum removal of Eu(III) ions was obtained in nitric acid solutions with concentrations of 1-6 mol/l. Additionally, increase in the europium removal rate is also observed at pH > 2 for beads and in the pH range of 2 to 4 for films. In the former case increase in the removal rate is explained by increase in the nitrate ion concentration in the solution and Eu(NO3)3(TODGA)3 complex formation, and in the latter case – by decrease in TODGA protonation rate with рН growth. Observed trends indicate a high similarity in surface sorption mechanisms between the materials studied. Sorption equilibrium of Eu(III) ions onto the styrene-divinylbenzene copolymer beads impregnated with TODGA is adequately fitted to Langmuir sorption isotherm. The maximum sorption capacity of this material for Eu(III) removal from solutions with nitric acid concentration of 1 mol/l is 7.4 mg/g. It has been found that the maximum removal rate of Eu(III) ions by the triacetate cellulose films is achieved for TODGA content in the films ≥ 40 % w/w. The possibility of selective europium sorption from natural water using both beads and films is shown. Although cations present in natural water do not bind to sorbents studied, there is still slight deterioration in sorption properties when moving from model solutions to natural water. Complete desorption of Eu(III) ions from the film surface is achieved by washing three times with an EDTA solution, рН = 6.8. Prepared films can be reused for Eu(III) ion removal.

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“…Luminescence of an Ln(III) complex with an appropriate ligand has been reported to be observed. 13 The luminescence spectrum of the Eu(III)-CMPO complex in the single CMPO-SiO2-P microparticle is shown in Fig. 1.…”

Section: Microspectroscopy Of Eu(iii) Extractionmentioning

confidence: 99%

“…4,8,9 The extraction of Ln(III) by CMPO in a water (w)/oil (o) system was reported to proceed on the basis of Eq. (1): [10][11][12][13] Ln 3+ (w) + 3CMPO(o) + 3NO3 -(w) ⎯→ Ln(CMPO)3(NO3)3(o).…”

Section: Introductionmentioning

confidence: 99%

Extraction Mechanism of Lanthanide Ions into Silica-based Microparticles Studied by Single Microparticle Manipulation a Microspectroscopy

et al. 2019

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Single porous silica microparticles coated with a styrene-divinylbenzene polymer (SDB) impregnated with octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) were injected into an aqueous 3 mol/L nitric acid solution containing trivalent lanthanide (Ln(III)), as a high-level liquid waste model. We used the microcapillary manipulationinjection technique; and the extraction rate of Ln(III), as an Ln(III)-CMPO complex, into the single microparticles was measured by luminescence microspectroscopy. The extraction rate significantly depended on the Ln(III), CMPO, or NO3concentration, and was analyzed in terms of diffusion in the pores of the microparticles and the complex formation of Ln(III). The results indicated that the rate-determining step in Ln(III) extraction was diffusion in the pore solution of the microparticles.

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Understanding the complexation of the Eu3+ ion with TODGA, CMPO, TOPO and DMDBTDMA: Extraction, luminescence and theoretical investigation

Cited by 29 publications

References 88 publications

Complexation of thorium with pyridine monocarboxylate-N-oxides: Thermodynamic and computational studies

Complexation of thorium with pyridine monocarboxylate-N-oxides: Thermodynamic and computational studies

Sorption properties of polymeric beads and films containing tetraoctyl diglycolamide towards europium (III) ions

Extraction Mechanism of Lanthanide Ions into Silica-based Microparticles Studied by Single Microparticle Manipulation a Microspectroscopy

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