検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

Intramolecular cooperative effect of a macrocyclic receptor bearing $$beta$$-diketone fragments on the extraction of strontium into an ionic liquid

イオン液体へのストロンチウムの抽出における$$beta$$-ジケトン部位を有する大環状レセプターの分子内協同効果

岡村 浩之; 長縄 弘親; 井村 久則*; 下条 晃司郎

Okamura, Hiroyuki; Naganawa, Hirochika; Imura, Hisanori*; Shimojo, Kojiro

The macrocyclic receptor (H$$_{2}$$$$beta$$DA18C6) composed of diaza-18-crown-6 and two molecules of 4-acyl-5-pyrazolone was synthesized for the extraction of Sr(II) into ionic liquids (ILs). The extraction performance of H$$_{2}$$$$beta$$DA18C6 in 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C$$_{n}$$mim][Tf$$_{2}$$N]) was remarkably enhanced by the intramolecular cooperative effect compared with that in chloroform. From the equilibrium analysis, the neutral complex, Sr($$beta$$DA18C6), was extracted into [C$$_{2}$$mim][Tf$$_{2}$$N]. The shortening of the average Sr-O distance in the Sr-$$beta$$DA18C6 complex in the IL was revealed from the extended X-ray absorption fine structure spectroscopy. This is the cause of the intramolecular cooperative effect in the IL.

Access

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.