26.  Electrochemical and Spectroscopic Studies of 5,10,15,20-Tetrakis(4-hydroxyphenyl)-21H,23H-porphine

Authors: G. Fagadar-Cosma, E. Fagadar-Cosma, I. Popa, I. Taranu


Abstract:

The synthesis, spectroscopic and electrochemical characterization of 5,10,15,20-tetrakis(4-hydroxyphenyl)-21H,23H-porphine (THPP) is presented. THPP is also characterized by mass spectrometry in addition to a variety of spectroscopic techniques (UV-vis, FT-IR, fluorescence) and 1H-NMR spectroscopy. Voltammetric and corrosion studies were carried out in order to investigate the electroactivity of THPP. Cyclic voltammograms obtained on Pt electrode, in PhCN with Bu4NClO4, present one reversible and two irreversible oxidation peaks. The corrosion inhibiting ability of THPP was illustrated by potentiodynamic curves obtained on carbon steel in 1N H2SO4, indicating a decrease of the current in the active region of the anodic polarization curve.


Keywords: 5,10,15,20-tetrakis(4-hydroxyphenyl)-21H,23H-porphine, fluorescence spectra, cyclic voltammetry, corrosion inhibition

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