Correction to Synthesis, Lanthanide Coordination Chemistry, and Liquid–Liquid Extraction Performance of CMPO-Decorated Pyridine and Pyridine N-Oxide Platforms

Crystallographic and Spectroscopic Characterization of Americium Complexes Containing the Bis[(phosphino)methyl]pyridine-1-oxide (NOPOPO) Ligand Platform

“…The reaction to form Am 1:1 was successful on the first attempt and was not repeated in this study, so consistency of formation cannot be commented on here. Although M 1:1 have never been previously reported for M = Eu, Nd, or Am, analogous 1:1 compounds containing NOPOPO ligands similar to L that include trifluoromethyl groups, 26 diethylcarbamoyl groups, 1,30 ethyl groups, 28 cyclohexyl groups, 31 and benzyl groups 28 have been structurally characterized for Pr, Nd, Eu, Dy, Er, and Yb species, in respective instances.…”

“…Although [M(L) 2 (NO 3 )][2(NO 3 )], M 2:1, have likely been synthesized for M = Am in the past, 19,22 single crystals have never been isolated and characterized by X-ray diffraction until now. Similar compounds containing 2,6-[Ph 2 P(O)CH 2 ] 2 C 5 H 3 −NO, L, or analogous ligands with para alkyl groups, 29 trifluoromethyl groups, 26 tolyl groups, 28 benzyl groups, 28 ethyl groups, 28 cyclohexyl groups, 31 and more recently diethylcarbamoyl groups 1,30 have been structurally characterized when the metal center is a lanthanide. Here, we were able to consistently produce pure crystalline batches of M 2:1, for M = Eu, Eu 2:1; Nd, Nd 2:1; and Am, Am 2:1, (Figure 2) by reacting 2 or more equiv of L with 1 equiv of the f element precursor in a 1:1 CHCl 3 /EtOH solution, as confirmed by CHN elemental analysis for all except the Amcontaining species.…”

“…Although several nuclear reprocessing methods have been devised over the past few decades, highly efficient 4f and 5f element separation schemes still pose a significant challenge to researchers. 1,2 So-called designer reprocessing routes have featured a collection of ligand platforms intended to sequester f elements from aqueous solutions and/or separate minor actinides, such as americium and curium, from the major actinides, namely, uranium and plutonium. 1,3−6 Of these, organophosphorus extractants have proven to be some of the most useful and are implemented in solvent extraction processes such as TALSPEAK (Trivalent Actinide-Lanthanide Separation by Phosphorus reagent Extraction from Aqueous Komplexes), 5,7 Advanced TALSPEAK, 8−10 PUREX (Plutonium and Uranium Reduction Extraction), 11 and TRUEX (Trans Uranium Extraction).…”

Establishing Cost-Effective Computational Models for the Prediction of Lanthanoid Binding in [Ln(NO3)]2+ (with Ln = La to Lu)

“…2 Although there have been many advances in separation science, efficient and highly selective binding to lanthanoids and actinoids continues to be present challenges. 3,4 Consequently, developing effective computational protocols to model lanthanoid-binding characteristics can aid researchers in nuclear operations to design new and improved methods of separating lanthanoids from bulk materials. Traditional electronic structure modeling of lanthanoid-containing compounds can be computationally expensive and inefficient for rapid predictive capabilities of large fully complexed compounds.…”

New extractant N,N′-dimethyl-N,N′-dicyclohexyl-2,(2′-dodecyloxyethyl)-malonamide (DMDCDDEMA) for radiotoxic acidic waste remediation: Synthesis, extraction and supported liquid membrane transport studies

“…Substituted diamides (also known as tetra or penta alkyl malonamides) have shown promise in view of their distinct advantages over the conventional organophosphorous extractants such as innocuous nature of the radiolytic degradation products, complete incinerability, and ease of synthesis [4][5][6][7][8][9]. Unlike other proposed extractants for actinide partitioning, malonamides do not display any third-phase formation problem under HLW conditions.…”