Electrochemical Fe3+ Ion Sensor Applications on Different Electrode Surfaces

The carbazole compound (C-C₈) containing aromatic ring with 8 carbon alkyl group (C₈) was synthesized. The thiophene-derived compound that was abbreviated as (T) was synthesized, and (CT-C₈) was obtained by adding of (T) to the starting compound (C-C₈). Additionally, the electrochemical polymers of CT-C₈ were synthesized and accumulated onto different surface types such as an indium tin oxide (ITO) coated glass, aluminum (Al) layer, copper (Cu) sheet and pen tip electrode (PTE). The electrochemical syntheses of the polymers were performed by using 0.05 M NaClO₄ as an electrolyte in acetonitrile (AN) solvent. The electrochemical behaviors of the polymers were also investigated by taking the cyclic voltammeric measurements with a triple electrode system, and the electrochemical behaviors of the coated polymers on different electrode surfaces were also researched in the presence of Fe³⁺ and Fe²⁺ metals. According to the obtained voltammogram results, it can be said that the electrochemically synthesized polymers on different electrode surfaces were sensitive to Fe³⁺ metal and they could be used as an electrochemical sensor for all electrode surfaces as mentioned above. For the performed electrochemical measurements, the oxidation and reduction peak values obtained for different electrode surfaces were different from each other. When it is desired to examine the electrochemical property of a material, there is a need to search for more useful and economical insoles, since the conductive surface like ITO is deformed after repeated applications and expensive. This study, which offers an alternative conductive base to replace ITO, is important in this regard.