Electrochemical preparation of poly(vinylferrocenium)perchlorate-polyaniline composite-modified platinium electrode in methylene chloride

Abstract

A new surface based on poly(vinylferrocenium)perchlorate-polyaniline (PVF + ClO 4 --PANI)composite-modified platinum electrode was prepared electrochemically to combine the electrocatalytic properties of an intrinsically conducting polymer and a redox polymer. The composite film was synthesized as a bilayer from individual polymerization solutions. Furthermore, PVF + ClO 4 -and PANI polymers were simultaneously deposited as a mixture from a methylene chloride solution containing PVF polymer and aniline monomer on Pt electrode. When PVF + ClO 4 -and PANI were codeposited by cycling the potential between 0.20 and 1.80 V vs Ag|AgCl, these polymers were encapsulated within each other. The encapsulation of PVF + ClO 4 -inside the growing PANI polymer provided the retainment of PVF + ClO 4 -on the electrode surface even if it was in dedoped form (PVF). This composite film was characterized by cyclic voltammetry, FTIR, SEM and conductivity measurements. The response of the composite film to catechol and hydroquinone was investigated by chronocoulometry in aqueous medium. It was found that the increase in charge consumption for catechol and hydroquinone was observed up to 7.5 and 5.0 times, respectively, when compared to that of PANI film. This might be due to the presence of PVF + ClO 4 -in the composite film, which played an important role in accelerating the electron transfer.Polyaniline (PANI) is one of the most extensively investigated intrinsically conducting polymers with commercial significance due to its high conductivity, good redox reversibility and stability in aqueous solutions and air for its applications in rechargeable batteries and environmental stability, as well as ease of synthesis 1-4 . PANI has many application areas such as

Investigation of the behavior of hydrogen‐bonded phenolic compounds and their determination by using poly(vinylferrocenium)–polyaniline composite film

“…PVF + –PANI composite‐coated electrode was electrochemically prepared by codepositing PANI and PVF + polymers on Pt electrode in a methylene chloride solution containing PVF polymer, aniline monomer, and HClO 4 . Supporting Information, Figure S1 shows the cyclic voltammetric scans taken during deposition in the potential region between 0.20 and 1.80 V [versus Ag/AgCl (sat)].…”

“…The green‐colored PVF + ( ) redox polymer was synthesized on Pt disc electrode in methylene chloride solution containing 100 mmol L −1 TBAP/1.0 mg mL −1 of PVF using potentiodynamic method. When the potential range was applied from −0.20 to 1.80 V [versus Ag/AgCl (sat)], green‐colored PVF + ( ) film was not observed on Pt electrode because of its reduction to PVF and thus being stripped from the electrode surface by dissolution in methylene chloride . Nevertheless, the green PVF + ( ) film can be easily obtained on Pt disc electrode surface when the lower potential is chosen as 0.20 V instead of −0.20 V .…”

“…When the potential range was applied from −0.20 to 1.80 V [versus Ag/AgCl (sat)], green‐colored PVF + ( ) film was not observed on Pt electrode because of its reduction to PVF and thus being stripped from the electrode surface by dissolution in methylene chloride . Nevertheless, the green PVF + ( ) film can be easily obtained on Pt disc electrode surface when the lower potential is chosen as 0.20 V instead of −0.20 V . Therefore, PVF + –PANI composite ‐ coated Pt electrode was prepared in 100 mM TBAP/33.0 mM HClO 4 /1.0 mg mL −1 PVF/100 mM aniline monomer solution by sweeping the potential region between 0.20 and 1.80 V [versus Ag/AgCl (sat)], at a scan rate of 100 mV s −1 .…”

“…In our previous studies, PVF + –PANI composite ‐ coated electrode was electrochemically prepared on Pt electrode for combining electrocatalytic properties of an intrinsically conducting polymer and a redox polymer. PANI and PVF + polymers were codeposited from a methylene chloride solution, containing PVF polymer and aniline monomer …”

Electrode Prepared with Combination of Different Conductive Polymers for Hydroquinone Determination in River Water

“…Kavanoz et al reported composite film of PANI with poly(vinylferrocenium) perchlorate on Pt electrode in dichloromethane medium. 9 Another widely used conductive polymer is poly(3-methylthiophene) (P3MT) that can be directly synthesized on electrode surface by electrochemical polymerization of 3-methylthiophene. Synthesis of P3MT for modification of electrodes were reported in acetonitrile, 6,10 dichloromethane, 4 chloroform 11 and aqueous solution 12 and prepared P3MT modified electrodes have shown electrocatalytic effect on riboflavin, 13 some phenolics 14,15 and dopamine.…”