Determining absolute electrochemiluminescence efficiencies of two iridium complexes
Abstract
This work reports absolute electrochemiluminescence (ECL) quantum efficiencies (QEs) of two iridium(III) complexes, fac-Ir(ppy)3 (Ir-1) and [Ir(ppy)2(dtbubpy)]+ ([Ir-2]+) in annihilation and coreactant pathways. With potentiodynamic scans and potential pulsing, ECL mechanisms were investigated by means of ECL-voltage curves, ECL-time curves and ECL spectroscopy. It was demonstrated that the radical stability and reactivity are the two main factors affecting ECL efficiencies in various processes, while intermediate charges have little effect. Considering the difference of such radical behaviors between [Ru(bpy)3]2+ and other luminophores, absolute ECL QEs are more applicable compared with the ones relative to [Ru(bpy)3]2+ as a standard.
Citation
Yang , L , Adsetts , J R , Zhang , R , Balónová , B , Piqueras , M T , Chu , K , Zhang , C , Zysman-Colman , E , Blight , B A & Ding , Z 2021 , ' Determining absolute electrochemiluminescence efficiencies of two iridium complexes ' , Journal of Electroanalytical Chemistry , vol. In press , 115891 . https://doi.org/10.1016/j.jelechem.2021.115891
Publication
Journal of Electroanalytical Chemistry
Status
Peer reviewed
ISSN
1572-6657Type
Journal article
Rights
Copyright © 2021 Elsevier B.V. All rights reserved. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1016/j.jelechem.2021.115891
Description
This work is financially supported by Natural Sciences and Engineering Research Council Canada (NSERC, DG RGPIN-2018-06556 and SPG STPGP-2016-493924), Canada Foundation of Innovation/Ontario Innovation Trust (CFI/OIT, 9040) and The University of Western Ontario. E. Z.-C. is a Royal Society Leverhulme Trust Senior Research fellow (SRF\R1\201089).Collections
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