A magenta polypyrrole derivatised with Methyl Red azo dye: synthesis and spectroelectrochemical characterisation

Almeida, Andresa K.A. de; Dias, Jéssica M.M.; Santos, Diego P. dos; Nogueira, Fred A.R.; Navarro, Marcelo; Tonholo, Josealdo; Lima, Dimas José da Paz; Ribeiro, Adriana S.

doi:10.1016/j.electacta.2017.04.068

Cited by 15 publications

(9 citation statements)

References 62 publications

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“…In order to observe the impact of doping level on TE performance more intuitively, the spectroelectrochemistry for PPy-PEE films was conducted with a 0.1 V interval from 0.1 to 0.8 V. As shown in Figure A, the neat PPy-PEE film displays the characteristic bands in the range of 400–600 nm corresponding to π–π* electronic transition. − The neutral absorption peak almost disappears after doping, indicating a rather high doping level for the film . As the doping potentials decrease from 0.1 to 0.8 V, the growth of intensity of peak at 770 nm can be obviously observed, which is attributed to the formation of polarons and the increase of doping level in PPy-PEE films.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Preparation and Regulation of Flexible Polypyrrole Film toward Enhanced Thermoelectric Performance

Jiang

Yang

et al. 2021

ACS Appl. Energy Mater.

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Flexible thermoelectric (TE) materials have received significant attention for their key role in developing renewable energy. Polypyrrole (PPy) film, as a promising TE material, shows poor flexibility and electrical conductivity by common oxidation polymerization due to π-conjugated rigid molecules. However, the dynamic conductive network formed between soft and rigid conductive polymers can dissipate mechanical energy while maintaining the integrity of the π-conjugation structure, enabling flexible and conductive thin films. To obtain a flexible freestranding PPy film, pentaerythritol ethoxylate (PEE)-borate was introduced into the PPy matrix to form a dynamic composite network (PPy/PEE) and enhance the elongation at the break (∼5.4%) due to the strong intermolecular interaction between PPy and PEE with the dopant anions (BF 3 − ). The as-prepared PPy films obtained at the PEE concentration of 0.07 M have achieved an enhanced electrical conductivity as high as 132.30 S cm −1 and a power factor of 0.33 μW m −1 K −2 . After the electrochemical treatment at 0.8 V, the electrical conductivity and power factor are further improved to 177.83 S cm −1 and 0.54 μW m −1 K −2 , respectively. The Seebeck coefficient dramatically increased up to 17.27 μV K −1 in the dedoped state. The PPy/PEE composite film still exhibits good flexibility after electrochemical dedoping, which makes it a promising way to optimize TE for flexible PPy films.

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Section: Resultsmentioning

confidence: 99%

Electrochemical Preparation and Regulation of Flexible Polypyrrole Film toward Enhanced Thermoelectric Performance

Jiang

Yang

et al. 2021

ACS Appl. Energy Mater.

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“…Films of PPy, PPy derivatised with methyl red (MR) and PPy doped with MR and the poly[3-(N-pyrrolyl)propyl-2-(4-dimethylaminophenylazo)benzoate] (PMRPy) were deposited onto ITO/glass [ 120 ]. The electrochromic properties of the PMRPy film, such as optical contrast, switching time and stability at the 100th cycle, were enhanced relative to the PPy/MR and PPy films.…”

Section: Spectroelectrochemical Approach To Study Electroactive Compo...mentioning

confidence: 99%

“…The spectroelectrochemical measurements showed that the potential-dependent spectra in PPy-Dye films were better than in PPy-ClO 4 film after modification. Several dyes with different structures were used as dopant agents in electrochemical synthesis of PPy films for electrochromic application in [ 12 , 13 , 14 , 120 , 121 , 122 ]. The obtained composites enhanced the electrochromic properties of PPy films and increased the number of colors.…”

Section: Spectroelectrochemical Approach To Study Electroactive Compo...mentioning

confidence: 99%

Spectroelectrochemistry of Electroactive Polymer Composite Materials

Грибкова

Некрасов

2022

Polymers

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In this review, we have summarized the main advantages of the method of spectroelectrochemistry as applied to recent studies on electrosynthesis and redox processes of electroactive polymer composite materials, which have found wide application in designing organic optoelectronic devices, batteries and sensors. These polymer composites include electroactive polymer complexes with large unmovable dopant anions such as polymer electrolytes, organic dyes, cyclodextrins, poly(β-hydroxyethers), as well as polymer-inorganic nanocomposites. The spectroelectrochemical methods reviewed include in situ electron absorption, Raman, infrared and electron spin resonance spectroscopies.

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“…The incorporation of organic dyes with reversible optoelectronic properties into the PPy backbone is a potential approach to achieve enhanced optical contrast and color modulation [18,19,20,21,22,23,24,25,26,27,28,29]. Although many organic dyes have poor solubility in water due to strong π–π interaction and planar structure, acidic dyes with solubility-enhancing groups, such as sulfonate groups, can be used as dopant agents, acting as charged species that promote the PPy conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…Compared to common dopant ions, these organic molecules, which are frequently used to treat textiles and leather articles, provide easy mass transport at the interface and charge transfer in the bulk, improving the electrochromic properties of the ICP. Another approach consisted of the incorporation of azo dyes into the ICP backbone [26,27,28]. However, although monomers undergo trans – cis photoisomerization upon irradiation, in some cases, the electrochromic properties of polymer films can be limited by the rigid conjugated backbone [30].…”

Section: Introductionmentioning

confidence: 99%

Electrochromic Self-Electrostabilized Polypyrrole Films Doped with Surfactant and Azo Dye

et al. 2019

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Two azo dyes, acid red 1 (AR1) and acid red 18 (AR18), were used alone or in combination with sodium dodecyl sulfate (SDS) for the electropolymerization of a pyrrole monomer. Polypyrrole (PPy) showed higher redox capacity when SDS and AR18 were used simultaneously as dopant agents (PPy/AR18-SDS) than when the conducting polymer was produced in the presence of SDS, AR18, AR1, or an AR1/SDS mixture. Moreover, PPy/AR18-SDS is a self-stabilizing material that exhibits increasing electrochemical activity with the number of oxidation–reduction cycles. A mechanism supported by scanning electron microscopy and X-ray diffraction structural observations was proposed to explain the synergy between the SDS surfactant and the AR18 dye. On the other hand, the Bordeaux red color of PPy/AR18-SDS, which exhibits an optical band gap of 1.9 eV, rapidly changed to orange-yellow and blue colors when films were reduced and oxidized, respectively, by applying linear or step potential ramps. Overall, the results indicate that the synergistic utilization of AR18 and SDS as dopant agents in the same polymerization reaction is a very successful and advantageous strategy for the preparation of PPy films with cutting-edge electrochemical and electrochromic properties.

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A magenta polypyrrole derivatised with Methyl Red azo dye: synthesis and spectroelectrochemical characterisation

Cited by 15 publications

References 62 publications

Electrochemical Preparation and Regulation of Flexible Polypyrrole Film toward Enhanced Thermoelectric Performance

Electrochemical Preparation and Regulation of Flexible Polypyrrole Film toward Enhanced Thermoelectric Performance

Spectroelectrochemistry of Electroactive Polymer Composite Materials

Electrochromic Self-Electrostabilized Polypyrrole Films Doped with Surfactant and Azo Dye

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