The electrochemistry of arylated anthraquinones in room temperature ionic liquids |
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| Authors: | Alicia Gomis‐Berenguer Maria Gómez‐Mingot Leticia García‐Cruz Thies Thiemann Craig E. Banks Vicente Montiel Jesús Iniesta |
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| Affiliation: | 1. Department of Physical Chemistry and Institute of Electrochemistry, University of Alicante, , E‐03080 Alicante, Spain;2. Department of Chemistry, Faculty of Science, United Arab Emirates University, , Al Ain, United Arab Emirates;3. Faculty of Science and Engineering, School of Science and the Environment, Division of Chemistry and Environmental Science, Manchester Metropolitan University, , Manchester, M1 5GD Lancs, United Kingdom |
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| Abstract: | Arylated anthraquinone derivatives of different sizes and different π‐basicities have been prepared, and the electrochemical behaviour of these substances has been studied on screen printed graphite electrodes in the three room temperature ionic liquids (RTILs), 1‐butyl‐3‐methylimidazolium hexafluorophosphate ([C4MIM][PF6]), 1‐hexyl‐3‐methylimidazolium hexafluorophosphate ([C6MIM][PF6]) and 1‐octyl‐3‐methylimidazolium hexafluorophosphate ([C8MIM][PF6]). Half redox potentials for the first and second one electron reduction waves were identified, and the diffusion coefficient values were estimated from cyclic voltammetry measurements. The influence of the nature of the RTIL and of the substitution pattern of the anthraquinone on the solvodynamic radii were studied. A correlation of the reductive potentials with the corresponding Hammett constants of the substituents was tested. Copyright © 2013 John Wiley & Sons, Ltd. |
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| Keywords: | arylated anthraquinones electron transfer quinone room temperature ionic liquid screen printed graphite electrodes solvodynamic radii |
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