Laser-induced fluorescence and infrared spectroscopic studies on the specific solvation of tris(1-(2-thienyl)-4,4,4-trifluoro-1,3-butanedionato)europium(III) in an ionic liquid

イオン液体中におけるトリス(1-(2-チエニル)-4,4,4-トリフルオロ-1,3-ブタンジオナト)ユウロピウム(III)の特異的溶媒和に関するレーザー励起蛍光及び赤外分光研究

岡村浩之 ; 坂江広基*; 木谷径治*; 平山直紀*; 青柳登 ; 斎藤拓巳*; 下条晃司郎 ; 長縄弘親 ; 井村久則*

Okamura, Hiroyuki; Sakae, Hiroki*; Kidani, Keiji*; Hirayama, Naoki*; Aoyagi, Noboru; Saito, Takumi*; Shimojo, Kojiro; Naganawa, Hirochika; Imura, Hisanori*

The extraction constant and the two-phase stability constant of tris(2-thenoyltrifluoroacetonato) europium(III) between 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C $_{4}$ mim][Tf $_{2}$ N]) as an ionic liquid and an aqueous phase were determined by considering the extraction equilibria. Specific solute-solvent interactions between the neutral Eu(III) chelate and [C $_{4}$ mim][Tf $_{2}$ N] molecules were revealed from the relationships between the distribution constant of the enol form of 2-thenoyltrifluoroacetone (Htta) and the distribution constant ( $_{rm D,M}$ ) of the neutral Eu(III) chelate. The coordination environment of Eu $^{3+}$ in the neutral Eu(III) chelate in [C $_{4}$ mim][Tf $_{2}$ N] was investigated by time-resolved laser-induced fluorescence spectroscopy and infrared absorption spectroscopy. Both methods consistently indicated that not only the Eu(III)chelate extracted but also Eu(tta) $_{3}$ (H $_{2}$ O) $_{3}$ synthesized as a solid crystal were almost completely dehydrated in [C $_{4}$ mim][Tf $_{2}$ N] saturated with water. Consequently, the higher $_{rm D,M}$ or extractability of the neutral Eu(III) chelate in the [C $_{4}$ mim][Tf $_{2}$ N] system can be ascribed to the dehydration of the Eu(III) chelate, which is caused by the specific solvation with [C $_{4}$ mim][Tf $_{2}$ N] molecules.

使用言語	:	English
掲載資料名	:	Polyhedron
巻	:	31
号	:	1
ページ数	:	p.748 - 753
発行年月	:	2012/01
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論文URL	:	https://doi.org/10.1016/j.poly.2011.10.031 この論文を読む・探す
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受委託・共同研究相手機関	:	金沢大学

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Web of Science® Times Cited Count	:	被引用回数：評価・統計等のため最新の被引用回数を確認したい場合は、直接Web of Science®をご確認ください。 http://www.webofknowledge.com/wos
InCites™	:	パーセンタイル：87.91 分野：Chemistry, Inorganic & Nuclear
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登録番号 : AA20111070
抄録集掲載番号 : 40000612
論文投稿番号 : 10524

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