Abstract
In this work, the determination of the products of interaction of NO 2 molecules with copper phthalocyanine films was performed using IR and Raman spectroscopy. It was stated that on contact with π electron network of phthalocyanine the oxidizing NO 2 gas causes the transfer of an electron from the phthalocyanine ring to NO 2 molecule. The formation of [CuPc] + and NO 2 − charged chemical forms was confirmed experimentally by Raman and IR spectroscopies, respectively. In order to determine the suggested structure of charge transfer complex the bands in the Raman spectra of CuPc film which are more sensitive to NO 2 were assigned by means of measuring the isotopic shifts of corresponding modes upon 15 N -substitution of β-CuPc. Besides, the correlation between sensor response, oxidative properties and structural features of CuPc film structure was demonstrated.
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