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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. Attached Files Name Description MIMEType Size Downloads 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 030102 Electroanalytical Chemistry Socio Economic Objective 970103 Expanding Knowledge in the Chemical 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 Collection: School of Life and Environmental Sciences Related Links Link Description Connect to published version (restricted access) Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Versions Version Filter Type Tue, 27 Aug 2013, 12:29:31 EST Thu, 29 Aug 2013, 09:59:02 EST Thu, 03 Oct 2013, 13:08:46 EST Wed, 05 Mar 2014, 15:15:31 EST Wed, 05 Mar 2014, 15:24:31 EST Filtered Full Citation counts: Cited 4 times in Scopus Search Google Scholar Access Statistics: 15 Abstract Views, 9 File Downloads  -  Detailed Statistics Created: Tue, 27 Aug 2013, 12:29:31 EST

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