Actinides Extractability Trends for Multidentate Diamides and Phosphine Oxides

Sasaki, Yoshiyuki; Kitatsuji, Yoshihiro; Sugo, Yumi; Tsubata, Yasuhiro; Kimura, Takaumi; Morita, Yasuji

doi:10.15261/serdj.19.51

Cited by 17 publications

(7 citation statements)

References 22 publications

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“…IDOA and MIDEHA in Figure 1 -40 -has a strong extractability for lanthanides and actinides, which are hard acid metals [5][6]8]. It appears that the sulfur donor atom does not strongly complex with Re(VII).…”

Section: Comparison Of Extraction Performance Of Midoa With Other Anamentioning

confidence: 99%

“…Although several extractants, like diglycolamides, malonamides and carbamoylmethyl phosphine oxides, have been developed for the recovery of actinides [1][2][3][4][5][6], information on novel extractants to extract the platinum metal group and oxonium ions is rarely reported. The reason why there are few reports is due to the difficulty in their complex formation, inert metal ions, and negative charges after formation of the oxonium ions.…”

Section: Introductionmentioning

confidence: 99%

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Studies on the Extraction of Soft Acid Metal Species Using MIDOA and Analogous Compounds

Sasaki

Saeki

Sugo

et al. 2015

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Section: Comparison Of Extraction Performance Of Midoa With Other Anamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Studies on the Extraction of Soft Acid Metal Species Using MIDOA and Analogous Compounds

Sasaki

Saeki

Sugo

et al. 2015

SERDJ

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“…Amidinothiourea ( Granylurea (GUREA) Figure 1 MIDOA, MIDEA, and NTAamide(C2 and C8) is similar to that for amide compounds [21][22][23]. More than 98% purity can be obtained and these reagents were used for solvent extraction (extractants: MIDOA, NTAamide(C8); masking agents: MIDEA and NTAamide(C2)).…”

Section: Dl-cysteine (Cs)mentioning

confidence: 99%

Masking Effects for Mo, Re, Pd and Ru by S and N-Donor Reagents through MIDOA and Ntaamide Extraction

Sasaki

Morita

Shimazaki

et al. 2016

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In this study, we examined the masking effects of 16 water-miscible reagents, on the extraction of Mo, Re, Ru, and Pd. These reagents included soft N-and/or S-donor atoms in their structures and they function as multidentate ligands. The extractants, methylimino-N,N-dioctylacetamide (MIDOA) and N,N,N',N',N'',), show significantly high distribution ratios for these metals(D(M)), were employed in this study. Masking effects were observed as a decrease in D(M) with an increase of masking agent concentration in these extraction systems. The results showed that D(Pd) can be considerably decreased by the addition of thiourea, cysteine, cysteamine, trisaminoethylamine, and diethylenetriamine, and D(Ru) is decreased by the addition of thiourea, trisaminoethylamine, and diethylenetriamine. Pd and Ru can be masked by similar reagents including N-or S-donor atoms, which suppressed the extraction into the organic phase. In contrast, D(Mo) was only slightly masked by the above-mentioned reagents. The masking of Mo was achieved using methylimino-N,N'-diethylacetamide, hexaethyl-nitrilotriacetamide, iminodiacetic acid, and iminodimethylphosphonic acid, which have a central N(CH 2 C(P)=O) 2 framework that is important for this purpose. A masking agent for Re was not found in this study.

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“…Derivatives of carbamoylmethylphosphine oxides (CMPO) are known as effective extractants of rare earth elements and actinides from mineral acid solutions [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. The high coordinating ability of these compounds is due to the presence of polar phosphoryl and amide groups.…”

Section: Introductionmentioning

confidence: 99%

Conformational Analysis of N-Alkyl-N-[2-(diphenylphosphoryl)ethyl]amides of Diphenylphosphorylacetic Acid: Dipole Moments, IR Spectroscopy, DFT Study

et al. 2021

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Experimental and theoretical conformational analysis of N-methyl-N-[2-(diphenylphosphoryl)ethyl]diphenylphosphorylacetamide, N-butyl-N-[2-(diphenylphosphoryl)ethyl]diphenylphosphorylacetamide, and N-octyl-N-[2-(diphenylphosphoryl)ethyl]diphenylphosphorylacetamide was carried out by the methods of dipole moments, IR spectroscopy, and Density Functional Theory (DFT) B3PW91/6-311++G(df,p) calculations. In solution, these N,N-dialkyl substituted bisphosphorylated acetamides exist as a conformational equilibrium of several forms divided into two groups—with Z- or E-configuration of the carbonyl group and alkyl substituent, and syn or anti arrangement of the phosphoryl-containing fragments relative to the amide plane. The substituents at the phosphorus atoms have eclipsed cis- or staggered gauche-orientation relative to the P=O groups, and cis orientation of the substituents is due to the presence of intramolecular H-contacts P=O...H−Cphenyl or p,π conjugation between the phosphoryl group and the phenyl ring. Preferred conformers of acetamides molecules are additionally stabilized by various intramolecular hydrogen contacts with the participation of oxygen atoms of the P=O or C=O groups and hydrogen atoms of the methylene and ethylene bridges, alkyl substituents, and phenyl rings. However, steric factors, such as a flat amide fragment, the bulky phenyl groups, and the configuration of alkyl bridges, make a significant contribution to the realization of preferred conformers.

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Actinides Extractability Trends for Multidentate Diamides and Phosphine Oxides

Cited by 17 publications

References 22 publications

Studies on the Extraction of Soft Acid Metal Species Using MIDOA and Analogous Compounds

Studies on the Extraction of Soft Acid Metal Species Using MIDOA and Analogous Compounds

Masking Effects for Mo, Re, Pd and Ru by S and N-Donor Reagents through MIDOA and Ntaamide Extraction

Conformational Analysis of N-Alkyl-N-[2-(diphenylphosphoryl)ethyl]amides of Diphenylphosphorylacetic Acid: Dipole Moments, IR Spectroscopy, DFT Study

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