Electrochemical, thermodynamics, and spectroscopic investigation of Eu(III) in T2EHDGA–[C₄mim][NTf₂] mixture

ABSTRACT

A systematic investigations on the electrochemical behavior of Eu(III) in an ionic liquid, 1-butyl-3-methylimidazoliumbis(trifluoromethanesulfonyl)imide ([C₄mim][NTf₂]), was studied in the presence of N,N,N′,N′-tetra(2-ethylhexyl)diglycolamide (T2EHDGA) by cyclic voltammetry. The cyclic voltammogram of Eu(III) in ionic liquid medium in the presence and absence of T2EHDGA were recorded at glassy carbon electrode. The diffusion coefficient of Eu(III) at the electrode–electrolyte inter phase was determined at various temperatures. Thermodynamic parameters were evaluated from the standard apparent potential value and the luminescence of Eu(III) and aggregation behavior of ionic liquid phase were investigated to understand the coordination environment Eu(III)-complex in ionic liquid medium.

KEYWORDS:

• Ionic liquid
• europium
• T2EHDGA
• voltammetry
• luminescence
• dynamic light scattering

Acknowledgments

The authors thank Dr Satendra Kumar, Material Chemistry Division, Chemistry Group, IGCAR for recording the luminescence spectra of the metal complex.

Additional information

Funding

This work was supported by the Board of Research in Nuclear Sciences [grant number 21/09/2015-BRNS/35040 to KAV].