Selective liquid-liquid extraction of uranyl species using task-specific ionic liquid, betainium bis(trifluoromethylsulfonyl)imide

Kotoe Sasaki; Tomoya Suzuki; Takahiro Mori; Tsuyoshi Arai; Koichiro Takao; Yasuhisa Ikeda

doi:10.1246/cl.140048

Selective liquid-liquid extraction of uranyl species using task-specific ionic liquid, betainium bis(trifluoromethylsulfonyl)imide

Kotoe Sasaki, Tomoya Suzuki, Takahiro Mori, Tsuyoshi Arai, Koichiro Takao, Yasuhisa Ikeda

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

Extraction behavior of U(VI) species from aqueous HNO3 solution to [Hbet][Tf₂N] or [TMPA][Tf₂N] phase (Hbet: betainium, TMPA: N,N,N-trimethyl-N-propylammonium, Tf₂N: bis(trifluoromethylsulfonyl) imide) has been studied. It was found that the extractability (E) is 62% in the extraction from 0.01M HNO₃ to [Hbet][Tf₂N] and decreases with an increase in [HNO₃] and that the U(VI) species are not extracted into [TMPA][Tf₂N] phase. These results suggest that the extraction of U(VI) species is due to the complex formation of UO ₂²⁺ with the COO^- group of deprotonated betaine (bet). Furthermore, other metal species such as Na(I) and Al(III) in 0.01M HNO₃ solution were found to be hardly extracted.

Original language	English
Pages (from-to)	775-777
Number of pages	3
Journal	Chemistry Letters
Volume	43
Issue number	6
DOIs	https://doi.org/10.1246/cl.140048
Publication status	Published - 2014

ASJC Scopus subject areas

Chemistry(all)

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title = "Selective liquid-liquid extraction of uranyl species using task-specific ionic liquid, betainium bis(trifluoromethylsulfonyl)imide",

abstract = "Extraction behavior of U(VI) species from aqueous HNO3 solution to [Hbet][Tf2N] or [TMPA][Tf2N] phase (Hbet: betainium, TMPA: N,N,N-trimethyl-N-propylammonium, Tf2N: bis(trifluoromethylsulfonyl) imide) has been studied. It was found that the extractability (E) is 62% in the extraction from 0.01M HNO3 to [Hbet][Tf2N] and decreases with an increase in [HNO3] and that the U(VI) species are not extracted into [TMPA][Tf2N] phase. These results suggest that the extraction of U(VI) species is due to the complex formation of UO 22+ with the COO- group of deprotonated betaine (bet). Furthermore, other metal species such as Na(I) and Al(III) in 0.01M HNO3 solution were found to be hardly extracted.",

author = "Kotoe Sasaki and Tomoya Suzuki and Takahiro Mori and Tsuyoshi Arai and Koichiro Takao and Yasuhisa Ikeda",

year = "2014",

doi = "10.1246/cl.140048",

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journal = "Chemistry Letters",

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AU - Sasaki, Kotoe

AU - Suzuki, Tomoya

AU - Mori, Takahiro

AU - Arai, Tsuyoshi

AU - Takao, Koichiro

AU - Ikeda, Yasuhisa

PY - 2014

Y1 - 2014

N2 - Extraction behavior of U(VI) species from aqueous HNO3 solution to [Hbet][Tf2N] or [TMPA][Tf2N] phase (Hbet: betainium, TMPA: N,N,N-trimethyl-N-propylammonium, Tf2N: bis(trifluoromethylsulfonyl) imide) has been studied. It was found that the extractability (E) is 62% in the extraction from 0.01M HNO3 to [Hbet][Tf2N] and decreases with an increase in [HNO3] and that the U(VI) species are not extracted into [TMPA][Tf2N] phase. These results suggest that the extraction of U(VI) species is due to the complex formation of UO 22+ with the COO- group of deprotonated betaine (bet). Furthermore, other metal species such as Na(I) and Al(III) in 0.01M HNO3 solution were found to be hardly extracted.

AB - Extraction behavior of U(VI) species from aqueous HNO3 solution to [Hbet][Tf2N] or [TMPA][Tf2N] phase (Hbet: betainium, TMPA: N,N,N-trimethyl-N-propylammonium, Tf2N: bis(trifluoromethylsulfonyl) imide) has been studied. It was found that the extractability (E) is 62% in the extraction from 0.01M HNO3 to [Hbet][Tf2N] and decreases with an increase in [HNO3] and that the U(VI) species are not extracted into [TMPA][Tf2N] phase. These results suggest that the extraction of U(VI) species is due to the complex formation of UO 22+ with the COO- group of deprotonated betaine (bet). Furthermore, other metal species such as Na(I) and Al(III) in 0.01M HNO3 solution were found to be hardly extracted.

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JF - Chemistry Letters

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Selective liquid-liquid extraction of uranyl species using task-specific ionic liquid, betainium bis(trifluoromethylsulfonyl)imide

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