Dual-emitting cyclometalated Ir() complexes with salicylaldimine-bound fluorophores for ratiometric oxygen sensing

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...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2024-10, Vol.6 (81), p.11572-11575
Main Authors: Tidma, Sirawit, Sutton, Gregory D, Dang, Linh T. M, Jiang, Chenggang, Teets, Thomas S
Format: Article
Language:English
Subjects:
Chemical compounds
Coumarin
Iridium compounds
Oxygen
Phosphorescence
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Description
Summary: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 O 2 partial pressures. Ratiometric oxygen sensors are described which link cyclometalated iridium phosphors with coumarin fluorophores via bidentate salicylaldimine linkers.
ISSN:1359-7345
1364-548X
1364-548X
DOI:10.1039/d4cc03220a