Lanthanides and Actinides in Ionic Liquids

Binnemans, Koen

doi:10.1016/b978-0-08-097774-4.00228-x

Cited by 35 publications

(32 citation statements)

References 302 publications

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“…The main advantageous properties of ionic liquid over the conventional organic solvents are their negligible vapor pressure, non-flammability, wide liquid range, tunable solvation ability for various organic and inorganic substances, and the fine tunability of structure and properties through varying the cations and anions. Ionic liquids were also used as catalysts, reagents, or solvents in several chemical reactions [2,3], and they can also be used in separation processes [4][5][6][7][8][9] and as functional materials, e.g., electrolytes for lithium cell and solar cells [3,[10][11][12][13]. Further applications of ionic liquids can be found as solvents and templates for materials science.…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquids and Rare Earth Soft Luminescent Materials

Li¹,

Wang²,

Wang³

et al. 2016

Green Chemistry and Sustainable Technology

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Soft luminescent materials resulting from the introduction of rare earth compounds to ionic liquids favorably combine the properties of ionic liquids with unique optical properties of rare earth compounds such as sharp emission band, long decay time of the excited state, and the tunable emission color over the entire spectral range of interest from UV to infrared spectral region. This chapter summarizes the progress ever made in such kind of soft luminescent materials, especially those that have been made in our research group. Our emphasis is put on the preparation strategies for the soft luminescent materials, the luminescent ionogels prepared from the immobilization of rare earth-containing ionic liquids by organosilica and polymers, and the unexpected luminescent enhancement of Eu 3+ -β-diketonate complexes hosted in zeolite L nanocrystals and nanoclay upon addition of ionic liquid bearing bulky triethoxysilane groups in water.

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Section: Introductionmentioning

confidence: 99%

Ionic Liquids and Rare Earth Soft Luminescent Materials

Li¹,

Wang²,

Wang³

et al. 2016

Green Chemistry and Sustainable Technology

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“…ndodecane), currently employed for the liquid-liquid extraction of actinides and lanthanides in aqueous reprocessing [6][7][8][9], with the aim to reduce the chemical and radiolytic degradation of the solvent, as well as the volume of generated secondary wastes. ii) as a possible alternative to high temperature molten salts (e.g.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of the cathodic behaviour of EuCl3 in two imidazolium chloride ionic liquids, the 1-butyl-3-methylimidazolium (C4mimCl) and the 1-ethyl-3-methylimidazolium (C2mimCl), on a glassy carbon electrode

Barrado

Rodríguez

Castrillejo

2017

Journal of Electroanalytical Chemistry

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A B S T R A C TThis work presents a comparative study of the electrochemical behaviour, on a glassy carbon electrode, of dissolved EuCl 3 in two chlorobasic ionic liquids, the 1-ethyl-3-methylimidazolium chloride, C 2 mimCl, and the 1-buthyl-3-methylimidazolium chloride, C 4 mimCl, over the temperature ranges 363-398 K and 343-363 K respectively. In both media, the electro-reduction of EuCl 6 3 − takes place via only one electrochemical step . The electrochemical system EuCl 6 4 − /Eu(0) has not been observed within the electrochemical window of both ILs, due to the prior reduction of the respective imidazolium cation from the solvents, which inhibits the electro-extraction of Eu (0) from the media on the GC electrode. The paper describes how several electrochemical techniques (e.g. cyclic voltammetry (CV), convolutive potential sweep voltammetry (CPSV), steady state voltammetry (SSV), chronopotentiometry (CP) and chronoamperometry (CA)) have been used experimentally: i) verifying assumptions used in their theoretical analysis, and ii) ensuring reproducible conditions at the electrode/electrolyte interface, with the aim to obtain highprecision measurements of the diffusion coefficient of EuCl 6 3 − . In order to know if there are discrepancies between the obtained data, a two-way analysis of variance, ANOVA, has been carried out. The analysis has shown that with a 95% confidence level there are no significant differences between the diffusion coefficients obtained by the different techniques. On the other hand, the diffusion coefficient of EuCl 6 3 − increases with the temperature following the Arrhenius law, being the activation energy for diffusion 40.4 ± 2.6 and 60.2 ± 1.8 kJ mol − 1 in C 2 mimCl and C 4 mimCl respectively. The dimensionless Schmidt numbers, defined as the ratio between solvent viscosity and solute diffusivity (Sc = ν/D), have also been calculated to characterise the solute global mass transport through its environment. On the GC electrode, the electro-reduction of EuCl 6 3 − to EuCl 6 4 − is a quasi-reversible process. Accurate values of the kinetic parameters (i.e. the intrinsic rate constant of charge transfer, k 0 , and the charge transfer coefficient, α), as well as the reversible half wave potential, E r 1/2 , have been obtained for the first time in the mentioned ionic liquids, by simulation of the cyclic voltammograms and logarithmic analysis of the voltammograms and convoluted curves.

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“…(Abbott et al 2008;Nockemann et al, 2006Nockemann et al, , 2009Scheeren et al, 2006) Ionic liquids of metal complexes which contain metal ions in their molecular structures (metallo-ILs) are particularly applicable in many fields as task-specific soft materials with many possibilities for molecular design. (Lee et al, 2004;Lin et al , 2005;Binnemans, 2007) The first systematic studies of metallo-ILs have been performed for the mixtures of 1-ethylpyridinium bromide and aluminum(III) chloride (Hurley & Wier, 1951). Since then the halogenoaluminate(III) and the alkylhalogenoaluminate(III) ionic liquids have been the most extensively studied systems (Hussey, 1988).…”

Section: Introductionmentioning

confidence: 99%