OPTICAL SENSOR FOR OXYGEN USING A PORPHYRIN-DOPED SOL-GEL GLASS

Organic dye-doped glasses, viz., platinum octaethylporphyrin incorpora ted in silica matrices by the sol-gel method, were prepared and their photochemical properties mere investigated, The optical sensing of oxy gen using these materials is based on the change in the phosphorescenc e intensity of the oxygen-sensitive dye, This approach allows the deve lopment of a photostable, chemically durable optical oxygen sensor wit h a fast response time (5 s). There mas no significant bleaching after 5 months in the absence of light.