PORPHYRIN-DOPED SOL-GEL GLASS AS A PROBE FOR OXYGEN SENSING

Inorganic silica glass loaded with platinum octaethylporphyrin (PtOEP) , an oxygen-quenchable luminescent dye, was prepared by acidic hydroly sis and condensation of tetraethyl orthosilicate (TEOS), and the optic al properties such as absorption and luminescence spectra were investi gated. Using these materials, an optical oxygen sensor was fabricated, based on the phosphorescence quenching of PtOEP, which responded in t he range of 0.5-100% O-2. For this sensor operational stability and ph otostability were enhanced compared to a polymer matrix-based sensor.