| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1325454 | Journal of Organometallic Chemistry | 2011 | 6 Pages |
A series of new cyclometalated iridium(III) complexes for electrochemiluminescence (ECL) system were synthesized and fully characterized. Using tri-n-propylamine (TPA) as an oxidative–reductive co-reactant, their ECL properties were studied in acetonitrile (CH3CN) and mixed CH3CN/H2O (50:50, v/v) solutions, respectively. Meanwhile, the influencing factors of ECL efficiencies, including working electrode, pH, and surfactant were investigated. A remarkable ECL enhancement (up to about 13.5 times), in comparison with the commonly used Ru(bpy)32+ (2,2′-bipyridyl) ruthenium(II), is observed from Ir(FPP)2(acac) (where FPP is 2-(4-fluorophenyl)-4-phenylpyridine, acac = acetylacetone) at Pt disk electrode. At the same time, an increase in ECL efficiency is also observed in surfactant media. This study provided a new method for further improving and tuning the ECL efficiency by designing new iridium complexes with the appropriate cyclometalated or ancillary ligands.
Graphical abstractA series of new cyclometalated iridium (III) complexes for electrochemiluminescence (ECL) system have been synthesized and fully characterized. Extremely efficient ECLs, approached 13.5× higher than that of Ru(bpy)32+, have been observed with TPA as a co-reactant at reasonable voltage and pH levels.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► In this study, new Ir(III) complexes for ECL system were synthesized and full charaterized. ► Efficient ECLs, approached 13.5× higher than that of Ru(bpy)32+, have been observed. ► It was find that ECL efficiency increased in surfactant media.
