Spectroscopic studies on the solvation of europium(III) chelate in ionic liquids

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

Solvation of a central Eu(III) ion in the tris(2-thenoyltrifluoroacetonato)europium(III) (Eu(tta) $_{3}$ ) chelate in 1-alkyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C $_{n}$ mim][Tf $_{2}$ N]; = 2-10) was investigated by time-resolved laser-induced fluorescence spectroscopy and infrared absorption spectroscopy. Both spectroscopic studies consistently indicated that Eu(tta) $_{3}$ extracted or synthesized was almost completely dehydrated in [C $_{n}$ mim][Tf $_{2}$ N] saturated with water. Furthermore, it was found that a small amount of [C $_{4}$ mim][Tf $_{2}$ N] caused the dehydration of the Eu(III) chelate in 1,2-dichloroethane. The release of the water molecules from the Eu(III) inner coordination sphere of Eu(tta) $_{3}$ can be ascribed to the specific solvation of [C $_{n}$ mim][Tf $_{2}$ N], i.e., coordination of Tf $_{2}$ N $^{-}$ molecules.

Language	:	Japanese
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Meeting title	:	第29回希土類討論会
Held date	:	2012/05
Location (city)	:	札幌
Location (country)	:	日本
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Keywords	:	no keyword
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Cooperating Institute	:	金沢大学

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Registration No. : BB20120223
JAEA Abstracts No. :
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