Annihilation electrogenerated chemiluminescence of mixed metal chelates in solution: Modulating emission colour by manipulating the energetics

Kerr, E, Doeven, E, Barbante, G, Hogan, C, Bower, D, Donnelly, P, Connell, T and Francis, P 2015, 'Annihilation electrogenerated chemiluminescence of mixed metal chelates in solution: Modulating emission colour by manipulating the energetics', Chemical Science, vol. 6, no. 1, pp. 472-479.


Document type: Journal Article
Collection: Journal Articles

Title Annihilation electrogenerated chemiluminescence of mixed metal chelates in solution: Modulating emission colour by manipulating the energetics
Author(s) Kerr, E
Doeven, E
Barbante, G
Hogan, C
Bower, D
Donnelly, P
Connell, T
Francis, P
Year 2015
Journal name Chemical Science
Volume number 6
Issue number 1
Start page 472
End page 479
Total pages 8
Publisher Royal Society of Chemistry
Abstract We demonstrate the mixed annihilation electrogenerated chemiluminescence of tris(2,2′-bipyridine)ruthenium(II) with various cyclometalated iridium(III) chelates. Compared to mixed ECL systems comprising organic luminophores, the absence of T-route pathways enables effective predictions of the observed ECL based on simple estimations of the exergonicity of the reactions leading to excited state production. Moreover, the multiple, closely spaced reductions and oxidations of the metal chelates provide the ability to finely tune the energetics and therefore the observed emission colour. Distinct emissions from multiple luminophores in the same solution are observed in numerous systems. The relative intensity of these emissions and the overall emission colour are dependent on the particular oxidized and reduced species selected by the applied electrochemical potentials. Finally, these studies offer insights into the importance of electronic factors in the question of whether the reduced or oxidized partner becomes excited in annihilation ECL.
Subject Electroanalytical Chemistry
Keyword(s) Emitting Electrochemical-Cells
Electron-Transfer Reactions
Iridium Complexes
Generated Chemiluminescence
Coordination-Compounds
Ruthenium(Ii) Complex
Selective Excitation
Electrochemiluminescence
Systems
State
DOI - identifier 10.1039/c4sc02697g
Copyright notice © 2015 The Royal Society of Chemistry
ISSN 2041-6520
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