Phthalocyanine films as active layers of optical sensors for pentachlorophenol detection

摘要

In this work, thin films of octasubstituted zinc phthalocyanine derivative (ZnPcR_8) with bulky sub-stituents 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/1. It was demonstrated that the specific binding of pentachlorophenol molecules causes substantial shift of △(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-FT1R) difference spectroscopy.