Journal Articles Advanced Optical Materials Year : 2025

Bright and Stable Electrochemiluminescence by Heterobimetallic IrIII‐MI (MI = CuI, AuI) Complexes

Neso Sojic

Abstract

Ionic transition metal complexes (iTMCs) often suffer from low photoluminescence quantum yield, especially in the red to near-infrared spectral region. Rational molecular design strategies unlock recovering the emission features efficiently. A potential solution is offered by bimetallic complexes, which are rapidly emerging as a valid and attractive class of emitters. In this work, the yet unexplored electrochemiluminescence (ECL) properties of a series of heterobimetallic complexes of general structure IrIII‐MI are investigated, where the formally neutral cyclometalated iridium complex provides efficient photo- and electro-active properties to the molecular emitters. Whereas bulky MI (gold or copper) metalloligand increases structural rigidity and chemical stability of the architecture while enabling larger values for the radiative rate constant. The IrIII‐MI shows highly efficient red ECL at λem,max = 600 nm, which is stable in a wider range of applied potential. The activation is triggered at 0.45–0.65 V, ca. 0.3–0.5 V lower than that of tris-(2,2′-bipyridyl) ruthenium(II) complex, [Ru(bpy)3]2+. Remarkably, the ECL quantum yield relative to [Ru(bpy)3]2+ is up to six-fold higher, thus positioning this new series of iTMCs amongst the brightest ECL-active emitters to date and possibly offering a platform to develop novel and even more efficient ECL probes for biosensing and bioimaging applications.

Fichier principal
Vignette du fichier
Reato, Bright and Stable Electrochemiluminescence, 2025.pdf (1.09 Mo) Télécharger le fichier
Origin Publication funded by an institution
Licence

Dates and versions

hal-05141864 , version 1 (03-07-2025)

Licence

Identifiers

Cite

Mattia Reato, Beatrice Polido, Anna Bonfiglio, Giulia Moro, Vincent César, et al.. Bright and Stable Electrochemiluminescence by Heterobimetallic IrIII‐MI (MI = CuI, AuI) Complexes. Advanced Optical Materials, 2025, 13 (14), pp.2403430. ⟨10.1002/adom.202403430⟩. ⟨hal-05141864⟩
231 View
80 Download

Altmetric

Share

  • More