Assembled diglycolamide for f-element ions sequestration at high acidity

Chavan, Vivek; Thekkethil, Vasudevan; Pandey, Ashok K.; Iqbal, Mudassir; Huskens, Jurriaan; Meena, Sher Singh; Goswami, A.; Verboom, Willem

doi:10.1016/j.reactfunctpolym.2013.10.011

Cited by 13 publications

(27 citation statements)

References 29 publications

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“…Over the past few decades, a new class of diamide extractants, diglycolamides (DGA), which contain ether linkages between two amide groups, has gained tremendous attention for the separation of actinides . Studies have shown that DGA forms reverse‐micellar type of supramolecular aggregates containing four ligand molecules upon equilibration with nitric acid solutions .…”

Section: Areas Of Nntmentioning

confidence: 99%

“…However, the laborious synthetic procedures for the preorganization on molecular platforms could limit their applications in bulk scale. To address this issue, Chavan et al introduced a new kind of DGA‐bearing monomer, N , N ‐dioctyl, N '‐propyl‐2‐methylacrylamide diglycolamide (methacryloyl–DGA) . This demonstrated that the methacryloyl–DGA monomer in conjugation with MNPs, which can be polymerized easily, showed an interesting extraction efficiency toward f‐element ions both in monomeric and in polymeric forms at 3 m HNO 3 concentration.…”

Section: Areas Of Nntmentioning

confidence: 99%

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Advanced Nanomaterials for Nuclear Energy and Nanotechnology

2019

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The use of the latest engineered nanomaterials in nuclear energy systems has opened doors for improving the performance and safety of nuclear power. Nuclear nanotechnology (NNT) deals with the use of engineered nanomaterials for future nuclear energy applications. Herein, the recent progress in research and benefits of using nanomaterials in different areas of nuclear energy like nuclear fuel extraction and fabrication, fission product capturing, creating robust reactor materials, radiation sensing and monitoring, and radioactive waste separation and spent nuclear fuel reprocessing are summarized. Ongoing research around the world in this field is reviewed, including experimental and computational methods.

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Section: Areas Of Nntmentioning

confidence: 99%

Section: Areas Of Nntmentioning

confidence: 99%

Advanced Nanomaterials for Nuclear Energy and Nanotechnology

2019

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“…It is also important to note that Am 3+ could not be deloaded from the poly(methacryloyl-DGA) matrix using the disodium salt of EDTA, while deloading from organic-phase-containing methacryloyl-DGA was rather easy. 26 In the case of DGA-grafted silica, the elution of Am(III) was also straightforward. 25 To clarify this, the poly(methacryloyl-DGA) samples were treated with HNO 3 and subjected to SAXS analysis.…”

Section: The Journal Of Physical Chemistry Bmentioning

confidence: 99%

“…25 It is interesting to note that polymeric DGA formed by using N,N-dioctyl,N′-propyl-2-methylacrylamide diglycolamide (methacryloyl-DGA) as a monomer showed a similar behavior, although nitric acidinduced aggregation is not expected in a cross-linked polymeric form. 26 The present work deals with a study on the changes in the geometrical arrangement of the aggregates of asymmetric methacryloyl-DGA and poly(methacryloyl-DGA) upon equilibration with nitric acid using SAXS to understand the sorption/ desorption behavior of Ln(III)/An(III,IV,VI) in the different spatial arrangements of DGA groups. To study the effect of the changes in the aggregates on the extraction ability, extraction studies were carried out with methacryloyl-DGA and TODGA (Scheme 1) in a 10:1 mixture of n-dodecane and 1-decanol and cross-linked poly(methacryloyl-DGA) for Eu 3+ , UO 2 2+ , Am 3+ , and Pu 4+ as the representative f-element ions.…”

Section: ■ Introductionmentioning

confidence: 99%

Understanding Nitric Acid-Induced Changes in the Arrangement of Monomeric and Polymeric Methacryloyl Diglycolamides on Their Affinity toward f-Element Ions

Chavan¹,

Patra²,

Pandey³

et al. 2014

J. Phys. Chem. B

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Assembled diglycolamides (DGAs) have a strong affinity toward f-element ions at high nitric acid concentrations. Small angle X-ray scattering studies revealed that nitric acid concentration dependent changes occur in the geometrical arrangement of the DGA units of monomeric methacryloyl-DGA and the corresponding polymeric DGA. Cylindrical aggregates of methacryloyl-DGA were formed in 10:1 n-dodecane:1-decanol (added for solubility reasons) upon equilibration with nitric acid. The lengths and diameters of the cylindrical methacryloyl-DGA aggregates increased on varying the nitric acid concentration from 3 to 4 mol L(-1). This resulted in an increase of the distribution coefficient (D) of Eu(3+) ions from 72 to 197. The physical structure of cross-linked (10 mol %) poly(methacryloyl-DGA) reorganized distinctly upon equilibration with nitric acid. In this case, also the DEu(3+) values increased significantly from 147 mL g(-1) at 1 mol L(-1) HNO3 to ∼4000 mL g(-1) at 4 mol L(-1) HNO3. Hydrogen bonds between the outer sphere of Eu(3+)/Am(3+)/Pu(4+) nitrate and DGA units provide stabilization in the hydrophobic environment. This results in enhancement of their extraction upon increasing nitric acid concentration both in the organic phase as well as in the polymer matrix. Though monomeric and polymeric methacryloyl-DGA are different in their physical assembling, the normalized DI values for a same f-element ion upon varying HNO3 concentrations show remarkably similar patterns in both forms. In addition, the unusual stoichiometry deduced from the slopes of the log D vs log[HNO3] curves at fixed nitrate concentration seems to suggest that the normal extraction mechanism may not be operating in the hydrogen bonded DGA assemblies.

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“…Am(III) had a 96% recovery from solutions containing methacryloyl-DGA or from DGA-coated nanoparticles, while recovery from poly(methacryloyl-DGA) was less efficient. 213 Pre-organisation of DGA units due to HNO3 induced a drastic change in the behaviour and structure of DGA assemblies by promoting the formation of hydrogen bonds among secondary amides. …”

Section: Dgas On Platformsmentioning

confidence: 99%

Alkylation and pre-organisation of diglycolamide ligands on flexible platforms for nuclear waste treatment

Leoncini

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Assembled diglycolamide for f-element ions sequestration at high acidity

Cited by 13 publications

References 29 publications

Advanced Nanomaterials for Nuclear Energy and Nanotechnology

Advanced Nanomaterials for Nuclear Energy and Nanotechnology

Understanding Nitric Acid-Induced Changes in the Arrangement of Monomeric and Polymeric Methacryloyl Diglycolamides on Their Affinity toward f-Element Ions

Alkylation and pre-organisation of diglycolamide ligands on flexible platforms for nuclear waste treatment

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