PtOEP/PS composite particles based on fluorescent sensor for dissolved oxygen detection

• PtOEP/PS fluorescent spheres were synthesized by a soap-free emulsion polymerization.
• PtOEP/PS fluorescent spheres exhibit high oxygen sensitivity and good photo-stability.
• Intensity ratio (I0/I) of PtOEP/PS fluorescent spheres shows a good linear relationship with the concentration of dissolved oxygen.

Mono-dispersed platinum octaethylporphyrin/polystyrene (PtOEP/PS) fluorescent spheres were synthesized by a soap-free emulsion polymerization for the detection of dissolved oxygen (DO), in which hydrophobic PtOEP as indicator is embedded in PS spheres during the synthesis procedure. The performance of the PtOEP/PS spheres-based optical oxygen sensor was evaluated by recording their fluorescence intensities in different oxygen (O2) environments. Results suggest that PtOEP/PS spheres exhibit good oxygen sensing properties with fast response time and reliable photo-stability after several months of storage.