Dual-emitting cyclometalated Ir(iii) complexes with salicylaldimine-bound fluorophores for ratiometric oxygen sensing†
Abstract
A new class of oxygen-sensing dual-emitting cyclometalated Ir(III) complexes is described. They function as ratiometric sensors that combine the blue fluorescence from coumarin as a self-referenced internal standard with yellow to red phosphorescence from bis-cyclometalated iridium complexes. The compounds have phosphorescence quantum yields up to 15%, lifetimes ranging from 0.23 to 9.4 μs, and are capable of sensing a wide range of O2 partial pressures.
- This article is part of the themed collection: ChemComm 60th Anniversary Collection