A novel luminescence-based colorimetric oxygen sensor with a "traffic light" response
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Updated: Aug 10, 2026

Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System
Published on: December 16, 2019
Rachel C Evans1, Peter Douglas, J A Gareth Williams
1Department of Chemistry, University of Wales Swansea, Singleton Park, Swansea, SA2 8PP, UK. rachelcevans@yahoo.co.uk
Abstract:
We report a novel dual-lumophore oxygen sensor incorporating two lumophores: (1) the platinum(II) cyclometalated complex of the N;C;N-coordinating ligand 1,3,5-tri-(2-pyridyl)benzene and (2) Platinum octaethylporphyrin, which differ in both their emission colours and oxygen sensitivities. Sensor response is given by a dramatic change in emission colour, from red to green at different oxygen concentrations, due to the complete or partial luminescence quenching of one or both of the sensing elements. This approach enables the simple and rapid evaluation of the O2 concentration present, making it applicable to commercial technologies such as modified atmosphere packaging.
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