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- W2330907023 abstract "The electrochemistry and electronic absorption spectroscopy of samarium, europium, and ytterbium were investigated in the 1-(1-butyl)trimethylammonium bis(trifluoromethylsulfonyl)imide (BuMe3NTf2N) and 1-butyl-3-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BuMePyroTf2N) ionic liquids and in these solvents containing the neutral tridentate ligand N,N,N′,N′-tetraoctyl-3-oxo-pentane diamide (TODGA) and the anionic hard ligand chloride. Lanthanide ions were introduced into the ionic liquids by controlled potential oxidation of the respective metals to yield solutions containing Eu2+, Sm3+, and Yb3+, and it was possible to cycle between Eu2+ and Eu3+ as well as Yb3+ and Yb2+ using controlled potential electrolysis. Electronic absorption spectroscopy suggested that the Ln3+ species are weakly solvated by Tf2N– anions as [Ln(Tf2N)x](x−3)– in the neat ILs. The quasireversible Ln3+/2+ couples of all three elements were readily accessible in these ILs, but Sm2+ was only stable on the voltammetric time scale. Addition of TODGA to [Ln(Tf2N)x](x−3)– solutions produces 3:1 complexes with Eu3+ and Sm3+ but only a 2:1 complex with the smaller Yb3+ ion. Depending on the temperature, addition of Cl– to solutions of [Ln(Tf2N)x](x−3)– induces precipitation of LnCl3(s) when the mole ratio mCl–/mLn3+ ≈ 3. However, when mCl–/mLn3+ > 3, these precipitates redissolve to form the octahedral chloride complexes, [LnCl6]3–." @default.
- W2330907023 created "2016-06-24" @default.
- W2330907023 creator A5026999902 @default.
- W2330907023 creator A5080889698 @default.
- W2330907023 date "2013-02-25" @default.
- W2330907023 modified "2023-09-24" @default.
- W2330907023 title "Electrochemical and Spectroscopic Investigation of Ln<sup>3+</sup> (Ln = Sm, Eu, and Yb) Solvation in Bis(trifluoromethylsulfonyl)imide-Based Ionic Liquids and Coordination by <i>N</i>,<i>N</i>,<i>N</i>′,<i>N</i>′-Tetraoctyl-3-oxa-pentane Diamide (TODGA) and Chloride" @default.
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- W2330907023 doi "https://doi.org/10.1021/ic3027557" @default.
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