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Luminescence Lifetime Imaging of O2 with a Frequency-Domain-Based Camera System
Published on: December 16, 2019
A novel luminescence-based colorimetric oxygen sensor with a "traffic light" response
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
Journal of Fluorescence
|March 18, 2006
Summary
A new dual-lumophore oxygen sensor uses two platinum complexes that change color with oxygen levels. This allows for quick and easy oxygen measurement, useful for food packaging.
Area of Science:
- Analytical Chemistry
- Materials Science
- Chemical Sensing
Background:
- Oxygen sensors are crucial for various applications, including food packaging and environmental monitoring.
- Existing oxygen sensing technologies can be complex or lack sensitivity.
- Dual-lumophore systems offer potential for enhanced sensor performance and simplified readout.
Purpose of the Study:
- To develop a novel dual-lumophore oxygen sensor with distinct emission colors and oxygen sensitivities.
- To demonstrate a sensor response characterized by a dramatic color change with varying oxygen concentrations.
- To evaluate the applicability of this sensor for commercial technologies like modified atmosphere packaging.
Main Methods:
- Incorporation of two specific lumophores: a platinum(II) cyclometalated complex and Platinum octaethylporphyrin.
- Utilizing differences in emission colors and oxygen sensitivities of the two lumophores.
- Observing luminescence quenching of one or both sensing elements at different oxygen concentrations.
Main Results:
- The dual-lumophore sensor exhibits a significant color change from red to green across different oxygen concentrations.
- This color change is attributed to the selective or combined luminescence quenching of the two sensing elements.
- The sensor provides a simple and rapid method for evaluating oxygen concentration.
Conclusions:
- The developed dual-lumophore sensor offers a novel approach for oxygen detection.
- The dramatic color change provides an intuitive and rapid readout of oxygen levels.
- This technology is well-suited for practical applications, including modified atmosphere packaging.
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