Structural, morphological and spectroelectrochemical characterization of poly (2-ethyl aniline)

Schemid, Andréia Leal; Torresi, Susana I. Córdoba de; Bassetto, Alessandra N.; Carlos, I.A.

doi:10.1590/s0103-50532000000300020

Cited by 32 publications

(30 citation statements)

References 11 publications

(14 reference statements)

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“…This value will be used to calculate the Ionization potential of the PEA (Roman et al, 1998). The multi redox potential was also observed in previously reported work (Schemid et al, 2000). …”

Section: Electrochemical Behavior Of Peasupporting

confidence: 59%

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Photoelectrochemical Studies on CdS/Poly Ethyl-Aniline Interfaces

Kasem¹,

Finley²

2013

IJC

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An inorganic/organic/interface (IOI) consisting of CdS/poly ethyl aniline (PEA) assemblies was subjected to photoelectrochemical studies in nanoparticle suspensions and in thin solid film forms . The effects that PEA modifiers have on the photoelectrochemical behavior of the IOI were investigated using [Fe(CN) 6 ] 4-as a photoactive hydrated electron donor agent. Results show that the adsorption process of [Fe (CN) 6 ] 3-(the photolysis product) controls the photoactivity outcome of IOI assemblies. CdS/PEA shows lower heterogeneous photochemical response than native CdS. Native CdS amorphous nanoparticles adsorb more [Fe(CN) 6 ] 3-with a very steady adsorption/desorption process than the CdS/PEA. The interface activities were explained by analyzing the IOI junction's properties such as electron affinity, work function and hole/electrons barrier heights. The lower hole barrier height versus electron barrier height suggests that charge injection is mediated at the IOI interface through hole transfer. The aqueous nano systems retained moderate stability as indicated by the reproducibility of their photocatalytic activities. Both [Fe(CN) 6 ] 4-and PEA contributed to the stability of native CdS surfaces.

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Section: Electrochemical Behavior Of Peasupporting

confidence: 59%

“…Absorption spectra of PEA were previously studied (Schemid et al, 2000) under varying potential. Such studies indicated that the redox process at ≈ 0.20 V is associated with chromophore groups absorbing at ca.…”

Section: Absorption Spectra Of Peamentioning

confidence: 99%

Photoelectrochemical Studies on CdS/Poly Ethyl-Aniline Interfaces

Kasem¹,

Finley²

2013

IJC

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“…Consequently, the extent of conjugation diminished. 24 The p-polaron transition wavelength of PANI salt prepared at the aniline/b-CD molar ratio of 80/20 shifted to longer wavelength compared with that of aniline/b-CD molar ratio of 100/0. The red shift implied that b-CD as an encapsule during polymerization would lead to enhanced coplanar characteristic of the PANI backbone, and that there existed interaction between PANI chains and b-CD, which made the energy gap of p-polaron narrower.…”

Section: Resultsmentioning

confidence: 97%

Effect of β‐cyclodextrin on the solid‐state synthesized polyaniline doped with hydrochloric acid

Ding

Abdiryim

et al. 2007

J of Applied Polymer Sci

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Polyaniline (PANI) salts doped with hydrochloric acid were prepared by using solid-state polymerization in the presence of b-cyclodextrin (b-CD) at room temperature. The fourier transform infrared (FTIR) spectra, ultraviolet-visible absorption spectra, X-ray diffraction patterns were used to characterize the molecular structures of these polymers. Cyclic voltammetry study and conductivity measurements were done to investigate their electrochemical behaviors. The morphology of polymers was studied by the scanning electron microscopy and transmission electron microscopy. The results showed that PANI salts prepared in the presence of b-CD had different physicochemical characteristics compared with PANI salt prepared in the absence of b-CD. When the molar ratio of aniline to b-CD was 80/20, the obtained PANI salt displayed higher crystallinity, conductivity and electrochemical properties. However, these properties were opposite on condition that the molar ratio of aniline to b-CD was 50/50. The results also revealed that the morphology of PANI salt was affected by b-CD, especially at aniline/b-CD molar ratio in the feed of 50/50, in which PANI salt displayed rodlike structure morphology with a diameter of near 80-100 nm.

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“…[1][2][3][4][5] Among the known conducting polymers, polyaniline (PANI) has been extensively studied due to its unique electrochemical and physicochemical behaviour, good environmental stability and relatively easy preparation. 6,7 However, polyaniline is inherently brittle and poor in processability due to its insolubility in common organic solvents. 8,9 To improve its processability, various procedures have been adapted.…”

Section: Introductionmentioning

confidence: 99%

Chemical modification of polyaniline by N-grafting of polystyrenic chains synthesized via nitroxide-mediated polymerization

Hatamzadeh¹,

Mahyar²,

Jaymand³

2012

J. Braz. Chem. Soc.

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obtido foi caracterizado por espectroscopia no infravermelho por transformada de Fourier (FTIR), varredura diferencial de calorimetria (DSC) e análise termogravimétrica (TGA). Propriedades óticas do (PSt-co-PMSt)-g-PANI nos estados não-dopado e dopado foram obtidas usando espectroscopia no ultravioleta-visível (UV-Vis), e condutividade elétrica a temperatura ambiente foi medida usando amostras nas quais os materiais condutores foram ensanduichados entre dois eletrodos de Ni. Além disso, eletroatividade do terpolímero sintetizado foi verificada sob condições voltamétricas sobre a superfície do eletrodo de trabalho de carbono vítreo (GCE). A solubilidade do terpolímero (PSt-co-PMSt)-g-PANI foi examinada em solventes orgânicos comuns, tais como, tetrahidrofurano (THF), clorofórmio e xileno.This study aims to explore an effective route for the preparation of conductive N-substituted polyaniline (PANI) by the incorporation of brominated poly(styrene-co-p-methylstyrene) onto the emeraldine form of polyaniline. For this purpose, at first, poly(styrene-co-p-methylstyrene) was synthesized via nitroxide-mediated polymerization (NMP), and then, N-bromosuccinimide was used as brominating agent to obtain a copolymer with bromine. Thereafter, deprotonated polyaniline was reacted with brominated poly(styrene-co-p-methylstyrene) to prepare the poly(styrene-co-p-methylstyrene)-graft-polyaniline [(PSt-co-PMSt)-g-PANI] terpolymer through N-grafting reaction. The terpolymer was characterized by Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Optical properties of (PSt-co-PMSt)-g-PANI in the undoped and doped states were obtained by ultraviolet-visible spectroscopy (UV-Vis), and electrical conductivity at room temperature was measured using samples in which the conductive materials was sandwiched between two Ni electrodes. Moreover, electroactivity of the synthesized terpolymer was verified under cyclic voltammetric conditions on the surface of the working glassy carbon electrode (GCE). The solubility of (PSt-co-PMSt)-g-PANI terpolymer was examined in common organic solvents, such as, tetrahydrofuran (THF), chloroform and xylene.

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Structural, morphological and spectroelectrochemical characterization of poly (2-ethyl aniline)

Cited by 32 publications

References 11 publications

Photoelectrochemical Studies on CdS/Poly Ethyl-Aniline Interfaces

Photoelectrochemical Studies on CdS/Poly Ethyl-Aniline Interfaces

Effect of β‐cyclodextrin on the solid‐state synthesized polyaniline doped with hydrochloric acid

Chemical modification of polyaniline by N-grafting of polystyrenic chains synthesized via nitroxide-mediated polymerization

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