Determining absolute electrochemiluminescence efficiencies of two iridium complexes

Liuqing Yang; Jonathan R. Adsetts; Ruizhong Zhang; Barbora Balónová; Marta T. Piqueras; Kenneth Chu; Congyang Zhang; Eli Zysman-Colman; Barry A. Blight; Zhifeng Ding

doi:10.1016/j.jelechem.2021.115891

Determining absolute electrochemiluminescence efficiencies of two iridium complexes

Liuqing Yang, Jonathan R. Adsetts, Ruizhong Zhang, Barbora Balónová, Marta T. Piqueras, Kenneth Chu, Congyang Zhang, Eli Zysman-Colman, Barry A. Blight, Zhifeng Ding

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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.

Original language	English
Article number	115891
Journal	Journal of Electroanalytical Chemistry
Volume	In press
Early online date	19 Nov 2021
DOIs	https://doi.org/10.1016/j.jelechem.2021.115891
Publication status	E-pub ahead of print - 19 Nov 2021

Keywords

Iridium(III) complexes
Electrochemiluminescence
Absolute and relative quantum efficiency
Radical stability
Radical reactivity

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10.1016/j.jelechem.2021.115891

Yang_2021_JoEC_Determining-absolute-ECL_AAM
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
Accepted author manuscript, 1.15 MBLicence: CC BY-NC-ND

Eli Zysman-colman SRF: New Frontiers in Multi-Resonance Thermally Activated Delayed Fluorescence Emitter Design for Organic Light-Emitting Diodes
Zysman-Colman, E. (PI)
The Royal Society
18/01/21 → 18/03/22
Project: Fellowship

Cite this

@article{fa1cbd3f80034bc394264a59209291cd,

title = "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.",

keywords = "Iridium(III) complexes, Electrochemiluminescence, Absolute and relative quantum efficiency, Radical stability, Radical reactivity",

author = "Liuqing Yang and Adsetts, {Jonathan R.} and Ruizhong Zhang and Barbora Bal{\'o}nov{\'a} and Piqueras, {Marta T.} and Kenneth Chu and Congyang Zhang and Eli Zysman-Colman and Blight, {Barry A.} and Zhifeng Ding",

note = "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).",

year = "2021",

month = nov,

day = "19",

doi = "10.1016/j.jelechem.2021.115891",

language = "English",

volume = "In press",

journal = "Journal of Electroanalytical Chemistry",

issn = "1572-6657",

publisher = "Elsevier",

}

TY - JOUR

T1 - Determining absolute electrochemiluminescence efficiencies of two iridium complexes

AU - Yang, Liuqing

AU - Adsetts, Jonathan R.

AU - Zhang, Ruizhong

AU - Balónová, Barbora

AU - Piqueras, Marta T.

AU - Chu, Kenneth

AU - Zhang, Congyang

AU - Zysman-Colman, Eli

AU - Blight, Barry A.

AU - Ding, Zhifeng

N1 - 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).

PY - 2021/11/19

Y1 - 2021/11/19

N2 - 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.

AB - 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.

KW - Iridium(III) complexes

KW - Electrochemiluminescence

KW - Absolute and relative quantum efficiency

KW - Radical stability

KW - Radical reactivity

U2 - 10.1016/j.jelechem.2021.115891

DO - 10.1016/j.jelechem.2021.115891

M3 - Article

SN - 1572-6657

VL - In press

JO - Journal of Electroanalytical Chemistry

JF - Journal of Electroanalytical Chemistry

M1 - 115891

ER -

Determining absolute electrochemiluminescence efficiencies of two iridium complexes

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Eli Zysman-colman SRF: New Frontiers in Multi-Resonance Thermally Activated Delayed Fluorescence Emitter Design for Organic Light-Emitting Diodes

Cite this