Abstract
In this work, thin films of octasubstituted zinc phthalocyanine derivative (ZnPcR 8) with bulky substituents R = –CH 2N(SO 2C 6H 5–CH 3)CH 2(CH 2) 8CH 3 are investigated as active layers of optical sensors for the detection of pentachlorophenol. Using total internal reflection ellipsometry (TIRE) technique response characteristics of ZnPcR 8 films to pentachlorophenol was studied in the concentration range 0.5–50 μg/l. It was demonstrated that the specific binding of pentachlorophenol molecules causes substantial shift of Δ( λ) spectrum. The minimum registered concentration of pentachlorophenol was 0.8 μg/l. The results are supported by performing attenuated total reflection Fourier transform infrared (ATR-FTIR) difference spectroscopy.
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