Solvent effect of ionic liquids on the distribution constant of 2–thenoyltrifluoroacetone
スポンサーリンク
概要
- 論文の詳細を見る
Distribution constants of 2-thenoyltrifluoroacetone (Htta) and its Ni(II)and Cu(II) chelates between 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide (Cn mimTf2N; n = 4, 6, and 8) as ionic liquid (IL) and an aqueous phase were determined. The enol fraction of Htta in ILs was spectrophotometrically measured to calculate the distribution constant of the enol form (KD,HE) of Htta. The KD,HE values in ILs were evaluated by comparing those in various molecular solvents such as alkanes, aromatic hydrocarbons, chlorohydrocarbons, ethers, ketones, and esters previously reported on the basis of the regular solution theory (RST). It was elucidated that the IL solutions of Htta (enol) can be taken as apparently regular solutions as expected in the organic solvents. On the other hand, the effect of ILs on the distribution constant of metal(II) chelates (KD,M) was fairly complicated. The Cu(tta)2-IL solutions behaved like the alkane and aromatic hydrocarbon solutions but the Ni(tta)2-IL (C4mimTf2N) like ether and ketone solutions. In the Ni(II) case, some specific interactions between the Ni(II) chelate and IL was suggested. Finally, the solubility parameters of ILs were calculated using KD,HE by RST and were in good agreement with the literature values obtained by the enthalpy of vaporization. © 2010 Elsevier B.V. All rights reserved.
論文 | ランダム
- D122 環境問題とエネルギー教育(II)
- 世界の食事・食品表示調査。続編(9)2009年のまとめ(下)
- 一般演題 (第10回日本老年医学会総会〔記事〕)
- タンパク同化ステロイド長期連続投与による血清コレステロールの変動-2-
- 脳血管障害による長期療養者の血清たんぱく分画の変動