使用1-烷基-3-甲基咪唑六氟磷酸盐室温离子液体作为与4,4,4-三氟-1-(2-噻吩基)-1,3-丁二酮的螯合萃取溶剂。

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.

作者信息

Hirayama Naoki, Deguchi Mika, Kawasumi Hitomi, Honjo Takaharu

机构信息

Department of Chemistry, Faculty of Science, Kanazawa University, Kanazawa 920-1192, Japan; Division of Material Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kanazawa 920-1192, Japan.

出版信息

Talanta. 2005 Jan 15;65(1):255-60. doi: 10.1016/j.talanta.2004.06.015.

DOI:10.1016/j.talanta.2004.06.015

PMID:18969792

Abstract

Possible use of room temperature ionic liquids (RTILs) as chelate extraction solvent was evaluated by using 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF(6)]), 1-hexyl-3-methylimidazolium hexafluorophosphate ([hmim][PF(6)]) and 1-octyl-3-methylimidazolium hexafluorophosphate ([omim][PF(6)]). These RTILs showed high extraction performance for divalent metal cations with 4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedione (Htta). The extracted metals were back-extracted into 1moldm(-3) nitric acid quantitatively. Furthermore, the extracted species were estimated as neutral hydrated complexes M(tta)(2)(H(2)O)(n) (n= 1 or 2) for M = Ni, Cu and Pb and anionic complexes M(tta)(3)(-) for M = Mn, Co, Zn and Cd.

摘要

通过使用1-丁基-3-甲基咪唑六氟磷酸盐（[bmim][PF₆]）、1-己基-3-甲基咪唑六氟磷酸盐（[hmim][PF₆]）和1-辛基-3-甲基咪唑六氟磷酸盐（[omim][PF₆]）评估了室温离子液体（RTILs）作为螯合萃取溶剂的可能性。这些室温离子液体对二价金属阳离子与4,4,4-三氟-1-(2-噻吩基)-1,3-丁二酮（Htta）表现出高萃取性能。萃取的金属被定量反萃取到1mol dm⁻³硝酸中。此外，对于M = Ni、Cu和Pb，萃取的物种估计为中性水合络合物M(tta)₂(H₂O)ₙ（n = 1或2），对于M = Mn、Co、Zn和Cd，为阴离子络合物M(tta)₃⁻。