Strong and Unexpected Effects of Diffusion Rates on the Generation of Electrochemiluminescence by Amine/Transition-Metal(II) Systems

Svir, I, Oleinick, A, Klymenko, OV and Amatore, C (2015) Strong and Unexpected Effects of Diffusion Rates on the Generation of Electrochemiluminescence by Amine/Transition-Metal(II) Systems ChemElectroChem, 2 (6). pp. 811-818.

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Abstract

© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.This theoretical work examines some basic and overlooked concepts that sustain the efficiency of electrochemiluminescence (ECL) generated by co-reactant systems such as the, nowadays classical, alkyl amine/transition metal(II) complex systems. Changes in the ECL intensities emitted by these systems are much more dependent on the relative diffusivities of the two co-reactants than on the range of thermodynamic and kinetic rate constants that are possible to explore and vary. In particular, decreasing the diffusion coefficients of the metal complexes species (e.g. by adequate redox or photochemically inert large substituents) relative to that of the amine co-reactant leads to a great enhancement in the ECL intensity of the first ECL wave, namely, that observed at the level of the amine oxidation peak. Though investigated by using simulations based on the thermodynamic and kinetic constants of the most common tri-n-propylamine/Ru(bpy)3²⁺ system (bpy=2,2’-bipyridine), the conclusions of this work are more general.

Item Type:	Article
Authors :	Name Email ORCID Svir, I Oleinick, A Klymenko, OV o.klymenko@surrey.ac.uk Amatore, C
Date :	6 October 2015
DOI :	10.1002/celc.201402460
Depositing User :	Symplectic Elements
Date Deposited :	17 May 2017 13:56
Last Modified :	16 Jan 2019 18:51
URI:	http://epubs.surrey.ac.uk/id/eprint/840904

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