Use of 1-alkyl-3-methylimidazolium hexafluorophosphate room temperature ionic liquids as chelate extraction solvent with 4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedione

Hirayama, Naoki; Deguchi, Mika; Kawasumi, Hitomi; Honjo, Takaharu

doi:10.1016/j.talanta.2004.06.015

Cited by 104 publications

(62 citation statements)

References 22 publications

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“…It was subsequently confirmed that Fe(III) is extracted into these phases as neutral FeQ3 as shown Eq. (20). In these cases, Dα is expressed as…”

Section: Extraction Of Fe(iii) With Hqmentioning

confidence: 99%

“…[8][9][10][11][12][13][14][15][16][17][18][19] Among several approaches, ionic liquid chelate extraction using Brønsted acidic chelators as extraction reagents 20,21 is interesting because a change in the aqueousphase pH results in changing the extraction performance.…”

Section: Introductionmentioning

confidence: 99%

“…For example, several divalent transition metals 20,24 and trivalent lanthanoids 25 were extracted into ILs with 2-thenoyltrifluoroacetone (Htta) as monoanionic complexes. Moreover, the ion-exchange abilities may affect the distribution behavior of extraction reagents between the two phases.…”

Section: Introductionmentioning

confidence: 99%

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Distribution Equilibria of Amphoteric 8-Quinolinol between 1-Alkyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)imide and Aqueous Phases and Their Effect on Ionic Liquid Chelate Extraction Behavior of Iron(III)

2017

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The distribution behavior of amphoteric 8-quinolinol (HQ) between ionic liquid (IL) phase and aqueous phase and ionic liquid chelate extraction behavior of iron(III) with HQ were investigated using four 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (CnmimTf2N, n = 2, 4, 6 and 8) ILs. Not only neutral HQ but also cationic H2Q + were distributed into the IL phase, and the latter distribution based on cation-exchange with Cnmim + was pronounced in the use of IL having a less-hydrophobic cation, such as C2mim + . In the IL chelate extraction of iron(III), the extractability increased with the increase in the hydrophobicity of IL as the extraction phase. Nevertheless, the determined equilibrium constants for the extraction as the neutral complex FeQ3 were similar to one another. The difference in the extractability among the ILs was due to the difference in the distribution of H2Q + into the extraction phase. In addition, the cationic coordinatively-unsaturated complex FeQ2+ was also extracted in use of less-hydrophobic C2mimTf2N.

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“…It was subsequently confirmed that Fe(III) is extracted into these phases as neutral FeQ3 as shown Eq. (20). In these cases, Dα is expressed as…”

Section: Extraction Of Fe(iii) With Hqmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Distribution Equilibria of Amphoteric 8-Quinolinol between 1-Alkyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)imide and Aqueous Phases and Their Effect on Ionic Liquid Chelate Extraction Behavior of Iron(III)

2017

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“…[1][2][3][4] Unlike molecular organic solvents, ILs have a much high polarity and ability as liquid ion-exchangers. Several coordinatively-unsaturated neutral complexes are extracted into ILs due to the former nature, [5][6][7] and several cationic 8,9 and anionic 5,10,11 complexes are also extracted due to the latter nature. Namely, the use of ILs as extraction solvents can result in a novel extraction separation performance.…”

mentioning

confidence: 99%

A Specific Synergistic Effect in Ionic Liquid Chelate Extraction Based on Neutral Ternary Chloro-complex Formation

Sakato

Hirayama

2014

ANAL. SCI.

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“…Plots of the extracted ratios (％E ) for some divalent metal cations as a function of the aqueous phase pH in Htta system 49) Initial Htta concentration in extraction phase : …”

mentioning

confidence: 99%

Extraction Behavior of Metal Cations in Ionic Liquid Chelate Extraction System

Hirayama

2008

Bunseki kagaku

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Use of 1-alkyl-3-methylimidazolium hexafluorophosphate room temperature ionic liquids as chelate extraction solvent with 4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedione

Cited by 104 publications

References 22 publications

Distribution Equilibria of Amphoteric 8-Quinolinol between 1-Alkyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)imide and Aqueous Phases and Their Effect on Ionic Liquid Chelate Extraction Behavior of Iron(III)

Distribution Equilibria of Amphoteric 8-Quinolinol between 1-Alkyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)imide and Aqueous Phases and Their Effect on Ionic Liquid Chelate Extraction Behavior of Iron(III)

A Specific Synergistic Effect in Ionic Liquid Chelate Extraction Based on Neutral Ternary Chloro-complex Formation

Extraction Behavior of Metal Cations in Ionic Liquid Chelate Extraction System

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