Electrical and spectroelectrochemical investigation of thiophene-based donor-acceptor copolymers with 3,4-ethylenedioxythiophene

Araujo, Marcus H. de; Matencio, Túlio; Donnici, Cláudio Luis; Calado, Hállen Daniel Rezende

doi:10.1590/0104-1428.03519

Cited by 3 publications

(2 citation statements)

References 52 publications

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“…[ 41,44,45 ] The Nyquist plot of the COF shows a diffusion‐limited electrochemical process comparable to many conductive and non‐conductive polymers [ 45 ] and a redox‐active pseudocapacitor, RuO 2 in Graphene. [ 41,46–49 ] In our three‐electrode set‐up, between the composite electrode in H 2 SO 4 and the KI + H 2 SO 4 , considering that the only major variable is the electrolyte resistance, we find that the R S decreases substantially upon adding the KI (4.5 Ω for H 2 SO 4 versus 1.1 Ω for KI + H 2 SO 4 ) (Figure 2C). The R CT values for both H + and the polyiodide were very small, as is seen from the Nyquist plot ( R CT (H + ) = 0.8; R CT (polyiodide) = 0.2), comparable to other redox electrolyte systems.…”

Section: Resultsmentioning

confidence: 78%

Exceptional Capacitance Enhancement of a Non‐Conducting COF through Potential‐Driven Chemical Modulation by Redox Electrolyte

Kushwaha

Haldar

Shekhar

et al. 2021

Advanced Energy Materials

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Capacitors are the most practical high‐storage and rapid charge‐release devices. The number of ions stored per unit area and their interaction strength with the electrode dictates capacitor‐performance. Microporous materials provide a high storage surface and optimal interactions. Adsorbing electron‐rich and easily polarizable molecules into microporous electrodes is expected to boost Faradaic pseudo‐activity. If such electrode–electrolyte interactions can be made as a potential‐driven reversible process, the resulting capacitors would be adaptable and device‐friendly. A composite covalent organic framework (COF)‐carbon electrode with redox‐active KI is combined in an H2SO4 electrolyte for the first time. This composite electrode benefits from the redox‐functionality of COF and electronic conductivity of carbon, leading to superior capacitative activity. Operando spectro‐electrochemical measurements reveal the existence of multiple polyiodide species, although the I3− is the predominantly electroactive species adsorbing on the microporous triazine‐phenol COF electrode. A systematic fabrication of the flexible solid‐state devices using the COF‐redox‐electrolyte reveals a high areal capacitance of 270 ± 11 mF cm−2 and gravimetric capacitance of 57 ± 8 F g−1. The inclusion of KI in H2SO4 (electrolyte) yields an approximately eight‐fold enhancement in solid‐state gravimetric specific capacitance. The imine‐COF retains 89% of its capacity even after 10 000 cycles.

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Section: Resultsmentioning

confidence: 78%

Exceptional Capacitance Enhancement of a Non‐Conducting COF through Potential‐Driven Chemical Modulation by Redox Electrolyte

Kushwaha

Haldar

Shekhar

et al. 2021

Advanced Energy Materials

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“…Spectroelectrochemical properties of three different EDOT and electron acceptor-thiophene derivatives ( 30-a, b and c) containing push-pull type copolymers were reported by Araujo et al [73] (Scheme 9). All copolymers were obtained via cyclic voltammetry with 20 repetitive cycles.…”

Section: The Copolymer Films That Become a Push-pull Type By Copolyme...mentioning

confidence: 84%

Electrochromic Insight on Electro‐Deposited Copolymers of Push‐Pull Conjugated Systems with 3,4‐Ethylenedioxythiophene (EDOT) and Other Conjugated Units

Ergun,

Hacioglu

2023

ChemistrySelect

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Third generation conducting polymers (CP) are push‐pull type conjugated systems, which include both electron pushing and pulling units in their chemical structure. Push‐pull design enables coarse and fine tuning in the electro‐optical properties of the resulting CP such as lowering the band gap and enhancing electrochromic properties. Push‐pull CPs have been widely used for various applications such as electrochromic devices, displays, light emitting diodes, organic solar cells, field effect transistors, electrochemical and optical sensors etc. This review aims to collect electrochemically synthesized CPs of push‐pull systems in the literature, up to 2023. Most of the studies include 3,4‐ethylenedioxythiophene (EDOT) as co‐monomers, but there are also other studies such as obtaining push‐pull type CPs by copolymerization, and copolymerization of push‐pull systems with other units. Each case is discussed in separate sections. In the scope of this review, only electrochemical copolymerization studies are selected, and the effect of monomer feed ratio and the polymerization conditions on the electrochromic properties of the resulting copolymers are discussed and summarized in tables. This collection can serve as a guide for upcoming copolymerization studies, by giving an insight into optical and electrochromic properties of various copolymers of push‐pull systems so far.

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Theoretical design, synthesis, characterization and solvatochromic studies and non-linear optical properties of poly[( 2,3,5,6- tetrafluorophenyl)-2,3-dihydrothieno[3,4-b][1,4]dioxine)] copolymer

Baby

Anugop²,

Kailasnath³

et al. 2022

J Polym Res

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Electrical and spectroelectrochemical investigation of thiophene-based donor-acceptor copolymers with 3,4-ethylenedioxythiophene

Cited by 3 publications

References 52 publications

Exceptional Capacitance Enhancement of a Non‐Conducting COF through Potential‐Driven Chemical Modulation by Redox Electrolyte

Exceptional Capacitance Enhancement of a Non‐Conducting COF through Potential‐Driven Chemical Modulation by Redox Electrolyte

Electrochromic Insight on Electro‐Deposited Copolymers of Push‐Pull Conjugated Systems with 3,4‐Ethylenedioxythiophene (EDOT) and Other Conjugated Units

Theoretical design, synthesis, characterization and solvatochromic studies and non-linear optical properties of poly[( 2,3,5,6- tetrafluorophenyl)-2,3-dihydrothieno[3,4-b][1,4]dioxine)] copolymer

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