Spectroscopic and electrochemical properties of europium(III) ion in hydrophobic ionic liquids under controlled condition of water content

Reactivity Towards Europium(III) of the Radiolysis Products of the Ionic Liquid 1‐Methyl‐3‐butyl‐1H‐imidazolium Bis[(trifluoromethyl)sulfonyl]amide (C4‐mimTf2N) and Effect of Water: A TRLFS (Time‐Resolved Laser‐Induced Fluorescence Spectroscopy) Preliminary Study

“…In particular, our data led to the sigmoid-shaped curves obtained by Nagaishi and coworkers for the 1/t vs. [H 2 O] tot and for the 1/t vs R variations (data not shown). However, our observed range of R values was slightly different than theirs for the same IL (0.4 to 3.0 in our case and 0.6 to 3.5 [16]). Such small differences can most probably be attributed to a higher maximum H 2 O content in our case for the R ¼ 0.43 value but can not be related to a change in IL chemical structure for the R ¼ 3.0 value.…”

“…Below 2600 ppm of added H 2 O, however, the t value was significantly larger than 110 ms, and the lifetime for the salt was in very good agreement with the lifetime of the driest sample. Comparing the R and [16]). In particular, our data led to the sigmoid-shaped curves obtained by Nagaishi and coworkers for the 1/t vs. [H 2 O] tot and for the 1/t vs R variations (data not shown).…”

Lanthanides and Actinides in Ionic Liquids

“…Europium(III) is easier to reduce to europium(II) in imidazolium and ammonium ionic liquids than in aqueous solutions. 125 Mudring et al reported that the divalent ytterbium ion is a stable species in a pyrrolidinium ionic liquid. 96 The redox behavior of the lanthanide complexes [Ln(Tf 2 N) 3 Tetravalent cerium is not stable in LiCl-KCl eutectic melts, because cerium(IV) is reduced by chloride ions.…”

Electrochemical behaviors of multivalent complexes in room temperature ionic liquids based on quaternary phosphonium cations

“…The peak separation between the anodic and the cathodic peaks in this voltammogram was approximately 80 mV at 0.01 V s À1 , which was slightly larger than the theoretical value for a reversible reaction with one electron transfer even though the IR drop was physically compensated. As an example of using imide type of IL, it was reported that the electrochemical reactions as for the Eu(III)/Eu(II) in N,N-diethyl-N-methyl-N-(2-methoxyethyl) ammonium-TFSI [22] and BMPTFSI [14] were quasi-reversible systems. From above information, it was conjectured that the redox reaction of the Eu(III)/Eu(II) would be regarded as a quasi-reversible system.…”