Electrochemical Polymerization of 3,4‐Ethylenedioxythiophene from Aqueous Solution Containing Hydroxypropyl‐β‐cyclodextrin and the Electrocatalytic Behavior of Modified Electrode Towards Oxidation of Sulfur Oxoanions and Nitrite

Abstract

Poly(3,4-ethylenedioxythiophene) (PEDOT) film was prepared on glassy carbon electrode from 0.1 M LiClO 4 aqueous solution containing 3,4-ethylenedioxythiophene (EDOT) monomer and hydroxypropyl-b-cyclodextrin (HP-b-CD), by multiple scan cyclic voltammetry. The effect of oxidation potentials on electropolymerization of EDOT was examined by chronoamperometry and cyclic voltammetric techniques. The results of potentiostatic experiments show that optimum potential range to obtain compact stable film was 0.9 to 1.05 V (vs. Ag/AgCl). At higher positive potential, i.e. above 1.05 V, polymer growth was hindered by passivation effect. The PEDOT film exhibited a strong absorption at 550 nm in the UV-vis region and also a multicolor electrochromism in different buffer solutions (sky blue-purple red). Cyclic voltammetric features of PEDOT-coated electrode in pure supporting electrolyte suggested that charge transfer of the film resembles that of surface-confined redox species. Finally, the electrocatalytic behavior of PEDOT-modified electrode was tested towards oxidation of sulfur oxoanions and nitrite using cyclic voltammetry.

Enzymeless creatinine estimation using poly(3,4-ethylenedioxythiophene) -β-cyclodextrin

“…The cyclodextrin-modified electrodes have been shown to exhibit varying catalytic behavior that would play an important role in electrocatalysis and electrochemical sensors [26][27][28]. To the best of our knowledge, the enzymeless estimation of creatinine using PED-OT polymer-supported-bCD modified electrode has not been reported so far.…”

“…Synthesis of creatinine imprinted poly bCD for the specific binding of creatinine over creatine is reported by Tsai and Syu [18]. Attachment of cyclodextrin to the electrode surface by various methods such as self-assembled monolayers of a thiolated cyclodextrin on the gold electrode [19][20][21], cyclodextrin-functionalized carbon nanotubes [22][23][24] and incorporation of cyclodextrin in the polymer backbone [25][26][27][28] have been extensively reported for diverse sensing applications.…”

Simultaneous electrochemical detection of the catecholamines and ascorbic acid at PEDOT/S-β-CD modified gold electrodes

“…Numerous authors have electropolymerised EDOT from organic media but dopant solubility can be limited in organic solvents. Recent literature findings report on the use of cyclodextrins (CDs) to electropolymerise thiophenes from aqueous solution [5][6][7][8]. The host-guest properties of CDs are well known [9,10] and can be used to increase EDOT solubility in H 2 O [11].…”

Dextrin‐ and Conducting‐Polymer‐Containing Biocomposites: Properties and Behavior as Cellular Matrix

“…In the last decade, several composites formed by CPs and CDs have been prepared and characterized 26–36. Specifically, Lagrost et al26, 27 prepared composites by electropolymerizing bithiophene and hydroxypropyl‐β‐cyclodextrin in aqueous media.…”