Electrochemical behavior of europium (III) in N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide

✍ Scribed by Ch. Jagadeeswara Rao; K.A. Venkatesan; K. Nagarajan; T.G. Srinivasan; P.R. Vasudeva Rao

• Book ID: 103827908
• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 393 KB
• Volume: 54
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/j.electacta.2009.03.074

✦ Synopsis

N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPyNTf 2 ) was synthesized and characterized by CHNS elemental analysis, 1 H and 13 C NMR and IR spectroscopy. Europium tris[bis(trifluoromethylsulfonyl)imide] (Eu(NTf 2 ) 3 ) was prepared and studied for the electrochemical behavior of Eu(III) in BMPyNTf 2 at glassy carbon and stainless steel working electrodes at 298-373 K by cyclic voltammetry, chronopotentiometry and chronoamperometry. Cyclic voltammogram of Eu(III) in BMPyNTf 2 consisted of a quasi-reversible cathodic wave at -0.45 V (vs. Fc/Fc + , 373 K), which could be attributed to the reduction of Eu(III) to Eu(II) and an irreversible wave at -2.79 V (vs. Fc/Fc + ) due to reduction of Eu(II) to Eu(0). The diffusion coefficient of Eu(III) in BMPyNTf 2 was determined to be in the range of ∼10 -7 cm 2 s -1 by various electrochemical methods and the charge transfer rate constant was determined to be ∼10 -5 cm s -1 by cyclic voltammetry.