Porphyrin Electropolymers For Application In Hyphenated Chemical Sensors

摘要

A series of pyrrole-substituted porphyrin monomers have been rationally prepared to tune the properties of the resulting polymeric film. Free-base porphyrins and their metallic complexes have been deposited onto Indium-Tin-Oxide (ITO) glass electrodes by electropolymerization technique. Electropolymers were characterized by UV-visible spectroscopy and Atomic Force Microscopy (AFM). Cyclic voltammetry has been utilised to study the electropolymerisation mechanism and to evaluate the polymer surface coverge parameters. The obtained porphyrin electropolymers have been exploited as sensing materials for hyphenated potentiometric and optical measurements with CSPT-potentiometric analytical system. Different food matrices, such as mineral waters, wines and vegetable oils, have been analysed by means of the resulting porphyrin based CSPT- potentiometric system.