The electrochemical behaviour of ferrocene in deep eutectic solvents based on quaternary ammonium and phosphonium salts

Laleh Bahadori, Ninie Suhana Abdul Manan, Mohammed Harun Chakrabarti, Mohd Ali Hashim, Farouq Sabri Mjalli, Inas Muen Alnashef, Mohd Azlan Hussain, Chee Tong John Low

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43 Citations (Scopus)

Abstract

The electrochemical behaviour of ferrocene (Fc) is investigated in six different deep eutectic solvents (DESs) formed by means of hydrogen bonding between selected ammonium and phosphonium salts with glycerol and ethylene glycol. Combinations of cyclic voltammetry and chronoamperometry are employed to characterise the DESs. The reductive and oxidative potential limits are reported versus the Fc/Fc+ couple. The diffusion coefficient, D, of ferrocene in all studied DESs is found to lie between 8.49 × 10 -10 and 4.22 × 10-8 cm2 s-1 (these do not change significantly with concentration). The standard rate constant for heterogeneous electron transfer across the electrode/DES interface is determined to be between 1.68 × 10-4 and 5.44 × 10-4 cm s-1 using cyclic voltammetry. These results are of the same order of magnitude as those reported for other ionic liquids in the literature.

Original languageEnglish
Pages (from-to)1707-1714
Number of pages8
JournalPhysical Chemistry Chemical Physics
Volume15
Issue number5
DOIs
Publication statusPublished - Feb 7 2013

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Physics and Astronomy(all)

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    Bahadori, L., Abdul Manan, N. S., Chakrabarti, M. H., Hashim, M. A., Mjalli, F. S., Alnashef, I. M., Hussain, M. A., & Low, C. T. J. (2013). The electrochemical behaviour of ferrocene in deep eutectic solvents based on quaternary ammonium and phosphonium salts. Physical Chemistry Chemical Physics, 15(5), 1707-1714. https://doi.org/10.1039/c2cp43077k