Formation of dinuclear copper(II) complex with N,N,N′,N′-tetrakis(2-pyridylmethyl)-1,2-ethanediamine in aqueous solution

Hirayama, Naoki; Iimuro, Shinji; Kubono, Koji; Kokusen, Hisao; Honjo, Takaharu

doi:10.1016/0039-9140(95)01790-9

Cited by 22 publications

(4 citation statements)

References 21 publications

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“…TPEN forms a distinctive and flexible complex with Cu 1+ or Cu 2+ , which exhibits dinuclear conformation with metal-metal bonds, bridging oxo and hydroxo ligands. The diversity of the composition of copper-TPEN complex depends on the stoichiometry, the condition of the reaction, and the presence of competing ligands [47,48]. This may partially explain the contradictory observation about the high stability of the copper-TPEN complex in vitro, but relative low affinity of TPEN for copper in vivo.…”

Section: Acyclic Amino Chelatorsmentioning

confidence: 80%

The significance of copper chelators in clinical and experimental application

Ding

Xie

Kang

2011

The Journal of Nutritional Biochemistry

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Section: Acyclic Amino Chelatorsmentioning

confidence: 80%

The significance of copper chelators in clinical and experimental application

Ding

Xie

Kang

2011

The Journal of Nutritional Biochemistry

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“…[5][6][7][8] N,N,N¢,N¢-(tetrakis-2-pyridylmethyl)ethylenediamine is recognized as a hexadentate ligand with six nitrogen donors and has been shown to chelate a variety of soft metal ions such as Hg, Cd, Au and Pd. [9][10][11][12][13] It was also shown to be effective for the chelation of f-block metals; the separation of minor actinides from high-level radioactive waste is a pressing issue. [14][15][16][17][18][19][20][21][22][23] Derivatives of TPEN have been used as extracting agents for a variety of metal ions in organic solvents.…”

Section: Introductionmentioning

confidence: 99%

Thermoresponsive extraction of cadmium(II) ions by poly(TPEN–NIPA) gels. Effect of chain length and branched spacer structure on gel formation and extraction behavior

Inaba

Tsumagari

Kida

et al. 2011

Polym J

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N,N,N¢,N¢-(tetrakis-2-pyridylmethyl)ethylenediamine (TPEN) derivatives bearing a polymerizable double bond in the substituent structure of the pyridine ring were synthesized and subjected to copolymerization with N-isopropylacrylamide in the presence of azobisisobutyronitrile. The obtained poly(TPEN-NIPA) gels show thermoresponsive swelling/shrinking behaviors, and are used for the extraction of cadmium(II) (Cd II ) ions from an aqueous solution to examine the relationship between gel characteristics and extraction performance. Polymer gels composed of TPEN derivatives bearing C3, C4, C10 and branched C3 spacer chains were synthesized, and the temperature-dependent Cd ion extraction behaviors of the gels were compared. The gels extracted Cd II ions efficiently from the aqueous solution in a swelling state at 5 1C, whereas little extraction was observed at 45 1C in the shrinking state. Poly(TPEN-NIPA) gel with branched C3 spacers (C3b) shows excellent thermoresponsive extraction performance.

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“…15,16 High molecular weight amines (HMWA) have emerged as powerful extractants for some metals. Recently, it has been shown that the extractants Adogen 364, 17 tricapryl methyl ammonium chloride (Aliquat-336), [18][19][20] Amberlite LA-2, 21,22 tris-(2-hydroxy-3,5-dimethylbenzyl) amine (H 3 tdmba), 23 trioctylmethylammoniumchloride (TOMAC), 24 trioctylamine and TOMAC 25 and the octyltrimethylammonium cation 26 are effective extractants for the extraction of anionic complexes of gallium(III). Adogen 364 undergoes self association during extraction.…”

Section: Introductionmentioning

confidence: 99%

Liquid–liquid extraction of gallium(III) with n-octylaniline from succinate media

Shilmkar

Kolekar

Anuse

2005

JSCS

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The distribution equilibrium of gallium(III) between n-octylaniline dissolved in toluene and acidic aqueous succinate media has been investigated as a function of the concentration of extractant in the organic phase and concentration of hydrogen ions and gallium( III) ions in the aqueous phase. The stoichiometry of the extracted species was determined on the basis of slope analysis.Gallium(III) is extracted by the anion exchange mechanism as [RNH3+Ga(succinate)2]org. The temperature dependence of the extraction equilibria was examined by the temperature variation method. The extraction process is favoured with increasing temperature. It was found that a large number of cations and anions have a high tolerance limit. The selectivity of the extraction is increased by the use of suitable masking agents. The method affords the binary separation of gallium(III) from associated elements and was further extended to the analysis of a synthetic mixture.

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Formation of dinuclear copper(II) complex with N,N,N′,N′-tetrakis(2-pyridylmethyl)-1,2-ethanediamine in aqueous solution

Cited by 22 publications

References 21 publications

The significance of copper chelators in clinical and experimental application

The significance of copper chelators in clinical and experimental application

Thermoresponsive extraction of cadmium(II) ions by poly(TPEN–NIPA) gels. Effect of chain length and branched spacer structure on gel formation and extraction behavior

Liquid–liquid extraction of gallium(III) with n-octylaniline from succinate media

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