Phthalocyanine films as active layers of optical sensors for pentachlorophenol detection
2009; Elsevier BV; Volume: 139; Issue: 2 Linguagem: Inglês
10.1016/j.snb.2009.03.062
ISSN1873-3077
AutoresTamara V. Basova, Vladimir Plyashkevich, Aseel Hassan, Ayşe Gül Gürek, Gülay Gümüş, Vefa Ahsen,
Tópico(s)Analytical Chemistry and Sensors
ResumoIn this work, thin films of octasubstituted zinc phthalocyanine derivative (ZnPcR8) with bulky substituents R = –CH2N(SO2C6H5–CH3)CH2(CH2)8CH3 are investigated as active layers of optical sensors for the detection of pentachlorophenol. Using total internal reflection ellipsometry (TIRE) technique response characteristics of ZnPcR8 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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