New perspectives on the annihilation electrogenerated chemiluminescence of mixed metal complexes in solution

Chemical Science
Emily KerrPaul S Francis

Abstract

Preliminary explorations of the annihilation electrogenerated chemiluminescence (ECL) of mixed metal complexes have revealed opportunities to enhance emission intensities and control the relative intensities from multiple luminophores through the applied potentials. However, the mechanisms of these systems are only poorly understood. Herein, we present a comprehensive characterisation of the annihilation ECL of mixtures of tris(2,2'-bipyridine)ruthenium(ii) hexafluorophosphate ([Ru(bpy)3](PF6)2) and fac-tris(2-phenylpyridine)iridium(iii) ([Ir(ppy)3]). This includes a detailed investigation of the change in emission intensity from each luminophore as a function of both the applied electrochemical potentials and the relative concentrations of the two complexes, and a direct comparison with two mixed (Ru/Ir) ECL systems for which emission from only the ruthenium-complex was previously reported. Concomitant emission from both luminophores was observed in all three systems, but only when: (1) the applied potentials were sufficient to generate the intermediates required to form the electronically excited state of both complexes; and (2) the concentration of the iridium complex (relative to the ruthenium complex) was sufficient to ove...Continue Reading

References

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Citations

Jul 5, 2018·Physical Chemistry Chemical Physics : PCCP·Lachlan C SoulsbyPaul S Francis
May 1, 2018·Chemical Communications : Chem Comm·Sergej KudrukFabio Rizzo
Jun 1, 2019·Chemical Communications : Chem Comm·Ashton G TheakstonePaul S Francis
Sep 7, 2019·Chemical Communications : Chem Comm·Lachlan C SoulsbyPaul S Francis
Sep 24, 2019·Journal of the American Chemical Society·Timothy U ConnellPaul S Francis
Dec 14, 2016·Analytical Chemistry·Lingling LiJun-Jie Zhu
Nov 2, 2018·Journal of the American Chemical Society·Weiliang GuoYuanhua Shao

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