I've been working on the incorporation of photosensitizing dyes into solid-state films, and have been attempting to analyse them for singlet oxygen generation using a chemical trapping method. However, both of the commonly used 1O2 sensors, diphenylisobenzofuran and 9,10-dimethylanthracene, decompose when exposed to light for long periods of time in the absence of the film. Are there any alternative, light stable sensors that can be used for this? Or a different method that can be used?
How about, if you have tried to measure the phosphorescence of singlet oxygen (NIR emission around 1270 nm). In solution phase, the singlet oxygen exhibit phosphorescence around 1270 nm, but I'm not sure in the film state. But I think its worth to try, may be you will get some useful information.
Dear Aimee,
Have a look at this paper: we did singlet oxygen detection by using a chemiluminiscent probe.(commercially available). Just detection, no quantum yield determination.
Article Photo-activated thin films of porphyrins for reactive oxygen...
There are several alternative sensors that can be used for the detection of singlet oxygen in solid-state films. One option is to use a luminescent probe, such as a phosphorescence-based sensor, which can detect singlet oxygen through a phosphorescence quenching mechanism. Another option is to use a fluorescence-based sensor, such as a fluorescence resonance energy transfer (FRET) sensor, which utilizes the energy transfer between a donor and acceptor dye to detect singlet oxygen. Additionally, electron paramagnetic resonance (EPR) spectroscopy can also be used to detect singlet oxygen, and it is a more robust method as it does not involve light exposure.
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Waves