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A potential-controlled switch on/off mechanism for selective excitation in mixed electrochemiluminescent systems

Doeven, Egan H., Zammit, Elizabeth M., Barbante, Gregory J., Francis, Paul S., Barnett, Neil W. and Hogan, Conor F. 2013, A potential-controlled switch on/off mechanism for selective excitation in mixed electrochemiluminescent systems, Chemical science, vol. 4, no. 3, pp. 977-982.

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Title A potential-controlled switch on/off mechanism for selective excitation in mixed electrochemiluminescent systems
Author(s) Doeven, Egan H.
Zammit, Elizabeth M.
Barbante, Gregory J.
Francis, Paul S.
Barnett, Neil W.
Hogan, Conor F.
Journal name Chemical science
Volume number 4
Issue number 3
Start page 977
End page 982
Total pages 6
Publisher RSC Publications
Place of publication Cambridge, England
Publication date 2013
ISSN 2041-6520
2041-6539
Summary We demonstrate the complete, rapid, and reversible switching between the emissions from two electrogenerated chemiluminescence (ECL) systems contained within the same solution, controlled by simple modification of the applied potential. The fundamental bases of the approach are the ability to selectively 'switch on' luminophores at distinct oxidation potentials, and an intriguing observation that the emission from the well-known electrochemiluminescent complex, fac-Ir(ppy)3, (where ppy is 2-phenylpyridinato), can be selectively 'switched-off' at high overpotentials. The dependence of this phenomenon on high concentrations of the co-reactant implicates quenching of the excited [Ir(ppy)3]* state by electron transfer. Rapid spectral scanning during modulation of the applied potential reveals well resolved maxima for mixtures comprising either green and red or green and blue luminophores, illustrating the vast potential of this approach for multiplexed ECL detection.
Language eng
Field of Research 059999 Environmental Sciences not elsewhere classified
Socio Economic Objective 970105 Expanding Knowledge in the Environmental Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2013, RSC Publications
Persistent URL http://hdl.handle.net/10536/DRO/DU:30055447

Document type: Journal Article
Collections: School of Life and Environmental Sciences
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Created: Tue, 27 Aug 2013, 12:29:31 EST