Optochemical vapour detection using spin coated thin film of ZnTPP

Abstract Spin-coated layers of ZnTPP have been used as optochemically interacting materials to detect 4-aminophenol, following the UV–vis optical absorption variations obtained by the exposure of the sensing layers to vapour analyte diluted in dry-air controlled atmosphere. A multichannel monitoring of the variation in the sensing layer main optical absorption bands after interaction with 4-aminophenol allow us to study the interaction mechanism between analyte and metalloporphyrin. Morphological characterization of the sensing layer was also performed by atomic force microscopy.

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