Synthesis of an amphiphilic metalloporphyrin and a novel gas sensor fabricated with Langmuir-Blodgett films

Article abstract of DOI:10.1016/0038-1098(96)00230-X

An amphiphilic metalloporphyrin, cobalt (II) 5,10,15-tri(p-octadecyloxyphenyl)-20-(p-hydroxyphenyl)porphyrin (CoPPC₁₈) was synthesized and characterized. The molecules of CoPPC₁₈ alone form moderate stable monolayer at the air-water interface and a clear phase transition was observed in the surface pressure-area isotherm. An optical Mach-Zhender interferometer was prepared as a novel sensor element incorporating with Langmuir-Blodgett films. The preliminary result indicates that the sensor is sensitive and reversible on exposure to NO₂ gas at room temperature. Copyright