Sensing Ability of Zn-Tetraphenylporphyrin Langmuir-Schaefer Films

floating layers were modeled and the geometric characteristics of molecular packings on water surface were calculated. It was shown that the area per molecule in the dense face-on packing of a monolayer is 1.69 nm 2 , and in the edge-on packing – 0.90 nm 2 . Analysis of the floating layer compression isotherm revealed that ZnTPP molecules are arranged face-on to the interface plane. Electron absorption spectroscopy showed that LS-films contain aggregates of J-type. The surface morphology of LS-films studied by AFM revealed that the average roughness of LS-films increases by 1.4 times with an increase in the number of transfers from one to five. The sensing properties of the LS-films (with 15 transfers) with respect to hydroxypyridine and pyridine in aqueous and gaseous media, correspondingly, have been studied. It was established that the LS-film is sensitive to pyridine vapors. The results obtained can be used to create selective sensors for environmental pollution monitoring