One-pot electrosynthesis of ultrathin overoxidized poly(3,4-ethylenedioxythiophene) films

Wang, Dantong; Pillier, Françoise; Cachet, H.; Debiemme‐Chouvy, Catherine

doi:10.1016/j.electacta.2021.139472

Cited by 12 publications

(15 citation statements)

References 64 publications

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“…This is because overoxidized PEDOT was formed due to the reaction between the oligomer n+ and the hydroxyl radical (OH⋅). When the applied oxidation potential exceeds 1.2 V, hydroxyl radicals are formed by the oxidation reaction of water [26]

true normalH_{2} normalO \to OH \cdot + normalH^{+} + e^{-} (at 1.2 V)

true PEDOT + OH \cdot \to overoxidized PEDOT

…”

Section: Resultsmentioning

confidence: 99%

“…When the applied oxidation potential exceeds 1.2 V, hydroxyl radicals are formed by the oxidation reaction of water. [26] H…”

Section: Characterization Of the Electrodeposited Thin Filmsmentioning

confidence: 99%

“…However, PEDOT-GQD exhibited similar ΔE p and i pc /i pa with those of bare GCE in the redox reaction of Ru(NH 3 ) 6 3 + , although PEDOT-ClO 4 /GCE showed lower i pc /i pa meaning slightly less reversible than bare GCE. This is because PEDOT-GQD undergoes effective redox reactions with Ru(NH 3 ) 6 3 + via the carbonyl and thionyl groups of the partially present overoxidized PEDOT, [26] despite a tradeoff between oxidized PEDOT and overoxidized PEDOT. Even with an increased R ct value in PEDOT-GQD/GCE compared to bare GCE (Figure 4e and Table S2), the porous structure of the 3D network in PEDOT-GQD yielded a larger electrochemically active surface area than those of the control groups.…”

Section: Chemelectrochemmentioning

confidence: 99%

“…Moreover, oxidized PEDOT and overoxidized PEDOT were formed through an electrochemical polymerization method in order to enhance the electrostatic attraction with the target molecules. [26] As a result, the fabricated PEDOT-GQD showee enhanced electrochemical catalytic activity which was characterized by electrochemical behavior studies using three representative redox-active materials such as K 3 Fe(CN) 6 , Ru(NH 3 ) 6 Cl 3 , and rubrene. Then, through utilizing the electrochemical characteristics of the PEDOT-GQD, we proved that PEDOT-GQD allows the determination of simultaneous or individual toward AA, UA, and DA with high sensitivity and selectivity.…”

Section: Introductionmentioning

confidence: 99%

“…This could facilitate interfacial electron transfer between the aromatic moiety of the target molecule and that of PEDOT as well as intra electron transfer among the PEDOT chains through π–π interactions. Moreover, oxidized PEDOT and overoxidized PEDOT were formed through an electrochemical polymerization method in order to enhance the electrostatic attraction with the target molecules [26] . As a result, the fabricated PEDOT‐GQD showee enhanced electrochemical catalytic activity which was characterized by electrochemical behavior studies using three representative redox‐active materials such as K 3 Fe(CN) 6 , Ru(NH 3 ) 6 Cl 3 , and rubrene.…”

Section: Introductionmentioning

confidence: 99%

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Graphene Quantum Dot‐Doped PEDOT for Simultaneous Determination of Ascorbic Acid, Dopamine, and Uric Acid

et al. 2022

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We propose a novel strategy to prepare poly(3,4-ethylenedioxythiophene) (PEDOT) thin films (PEDOT-GQD) doped with graphene quantum dots (GQD) as an electrode active material for an electrochemical biosensor. The PEDOT-GQD was prepared through simultaneous electropolymerization and doping of EDOT using an ionic complex composed of several Li + cations and one multivalent GQD anion (Li-GQD) by potential cycling without any additives. The Li-GQD, acting as a supporting electrolyte and an anionic dopant, leads a conformational change in the PEDOT chains into an expanded-coil structure. This led to the formation of the PEDOT-GQD with expanded-coil polymeric chains which increases not only intramolecular electron transfer among PEDOT chains but also interfacial charge transfer between the aromatic moieties of target molecules and that of PEDOT through π-π interaction. Moreover, PEDOT-GQD revealed a porous structure with interconnected 3D networks, as GQD doped into the PEDOT backbone affects the growth mechanism of PEDOT. Interestingly, applying a potential of more than + 1.2 V in the electropolymerization caused the mixed formation of oxidized PEDOT and overoxidized PEDOT, leading to the high electrocatalytic activity of PEDOT-GQD. The resulting PEDOT-GQD based electrochemical sensor exhibited excellent electrochemical performances in the simultaneous detection of ascorbic acid, dopamine, and uric acid, such as high sensitivity, selectivity, reproducibility, stability, also in real sample analysis.

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