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
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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