Synthesis, characterization and electrochromic properties of a conducting copolymer of pyrrole functionalized polystyrene with pyrrole

Tarkuc, Simge; Şahi̇n, Elif; Toppare, Levent; Colak, Demet Goen; Cianga, Ioan; Yaǧcı, Yusuf

doi:10.1016/j.polymer.2006.01.072

Cited by 54 publications

(27 citation statements)

References 35 publications

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“…32 The absorption band at 817 cm -1 (characteristic of the out-of-plane bending vibration of the 1,4-disubstituted benzene ring, polystyrene and poly(p-methylstyrene)) has characteristic peaks at 2921 and 2853 cm -1 , being attributed to aliphatic C-H stretchings, and 759 and 699 cm -1 peaks correspond to the out-of-plane hydrogen deformation that indicates the existence of the polystyrenic chains in our sample. 33 Additional evidence for the synthesis of the (PSt-co-p-PMSt)-g-PANI was also obtained from 1 Furthermore, before the incorporation of brominated (PSt-co-p-PMSt) onto emeraldine form of PANI, the ratio of aliphatic hydrogens to aromatic hydrogens in brominated (PSt-co-p-PMSt) is [9 -(9 × 0.1168):9 ca. 1:1.13].…”

Section: Resultsmentioning

confidence: 87%

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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Section: Resultsmentioning

confidence: 87%

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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“…Characterization of product (3) 13 C NMR: An investigation was devoted to the analysis of the polymer (3) by 13 C NMR spectroscopy (Table 3a).…”

Section: Resultsmentioning

confidence: 99%

“…We have carried out a series of experiments by maintaining the quantities of the reagents and varying the time t (Figures 1 and 2). The molecular structure of products of all reactions of piperazine with dihalogenated compounds was characterized by FT-IR spectroscopy (Perkin Elmer System), 1 H-nuclear magnetic resonance (NMR) and 13 C nuclear magnetic resonance (NMR) measurements were carried out on New polymers polypiperazines were synthesized in the presence of a non-toxic catalyst Maghnite-H + from the addition of dihalogenated compounds such as 1,6-dichlorohexane and 1,2-dibromopropane to piperazine, after the comparative study of the polymerizations without and with this catalyst. The yields of the synthesis induced by Mahgnite-H + are high compared with those of the uncatalyzed reactions.…”

Section: Experimental Part Materialsmentioning

confidence: 99%

“…By constation, the yield grows either with the increase of reaction time, or by increasing the quantity of the catalyst. All products synthesized during the addition of dihalogenated compounds to piperazine were characterized by FT-IR spectroscopy (Perkin Elmer System), 1 H-nuclear magnetic resonance (NMR) and 13 C nuclear magnetic resonance (NMR) measurements were carried out on a 300 MHz Bruker NMR Spectrometer. …”

Section: Experimental Part Materialsmentioning

confidence: 99%

“…On the other hand, the grafting of this monomer on a halide was done by Benhamou [10] at ambient temperature and in the presence of tetrahydrofuran. The new non-toxic initiator Maghnite-H + [11][12][13][14][15][16] has been used to prepare and study several kinds of polymers.…”

Section: Introductionmentioning

confidence: 99%

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Piperazine Polymerization Catalyzed by Maghnite-H

Dc¹,

Méghabar²,

Belbachir³

2017

J Environ Anal Chem

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New polymers polypiperazines were synthesized in the presence of a non-toxic catalyst Maghnite-H + from the addition of dihalogenated compounds such as 1,6-dichlorohexane and 1,2-dibromopropane to piperazine, after the comparative study of the polymerizations without and with this catalyst. The yields of the synthesis induced by Mahgnite-H + are high compared with those of the uncatalyzed reactions. In our case, the effect of reaction time on the yield was studied by carrying out a series of experiments by maintaining the quantities of the reagents and varying the time t. On the other hand, polymerizations of piperazine are realized by maintaining the amounts of monomer, the time duration and varying the amount of Mahgnite-H + in order to control the influence of the amount of this catalyst on the yield of the bulk polymerization of the piperazine. By constation, the yield grows either with the increase of reaction time, or by increasing the quantity of the catalyst. All products synthesized during the addition of dihalogenated compounds to piperazine were characterized by FT-IR spectroscopy (Perkin Elmer System), 1 H-nuclear magnetic resonance (NMR) and 13 C nuclear magnetic resonance (NMR) measurements were carried out on a 300 MHz Bruker NMR Spectrometer.

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Molecular‐Pillar‐Supported Functionalized Reduced Graphene‐Oxide for Energy Efficient Lubrication

Gupta

Kumar

Panda

et al. 2016

Adv Materials Inter

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of anisotropic crystal structure, signifying strong covalent intralayer and weak van der Waals interlayer interactions. The layered lattice structure of graphene and its derivatives in lube oil provide an effective lubrication and antiwear properties. [9][10][11][12][13] However, it is a hydrophobic material and dispersion in a polar hydrophilic lube is unfavorable. In the light of this, oxygen functionalization converts graphene into graphene oxide/reduced graphene oxide (GO/rGO), providing a hydrophilic nature. The GO/rGO is a derivative of graphene containing abundant oxygen functional groups such as carboxyl, hydroxyl, and ether on the basal plane of carbon sheet. [ 14 ] Oxygen functionalization and chemically modifi ed graphene sheet is widely utilized to engineer molecular selfassemblies of organic ingredient for wide range of applications. [15][16][17][18] The presence of hydrophilic oxygen containing groups and hydrophobic aromatic frameworks in GO/rGO makes it an amphiphilic copolymer system, retaining a 2D feature in solution. [ 19 ] Baoli et al. proposed successful grafting of graphene with polyaniline (PANI) through the self assembled amino-propylsilane monolayer and chemical oxidative graft polymerization. [ 20 ] Feng et al. and Fan et al. prepared graphene-PANI composite fi lms by electrochemical process for the use in supercapacitor electrodes. [ 21,22 ] In this composite, the van der Waals interaction dominates between graphene and the conductive polymer. It is well-known that the large surface area of graphene and strong van der Waals force causes severe aggregation in the composite matrix. Therefore, strong interfacial adhesion and compatibility between graphene and the matrix involves dispersion of graphene a prerequisite for its reliable performance. To address these issues, graphene must be functionalized using both covalent and noncovalent approaches. However, covalently bonded polyaniline-graphene hybrids are rarely reported. [ 23,24 ] Kumar et al. reported a chemically bonded graphene-polyaniline hybrid, in which a carboxylic acid ester group linked graphene and PANI. [ 23 ] Novel graphene-polyaniline hybrid based on the PANI nanofi ber was formed through van der Waals interaction. [ 24 ] An et al. reported amide groups linkage between graphene-polyaniline-grafted PANI nanofi bers and graphene. [ 25 ] Presently, there is no report of grafted graphene-polyaniline dispersed in a lube medium for tribology Molecular-pillar-supported basal plane of reduced graphene oxide (rGO)is fabricated by polymerizing polyaniline (PANI). In the presence of poly(ethylene glycol) (PEG200), the γ -radiolysis is used for modifying the functionalization and improving the structural symmetry of PANI and PEG grafted rGO (PANI-PEG-g-rGO). The PANI is covalently and noncovalently grafted onto the surface of the graphene sheets. Carboxyl groups of rGO are linked to the nitrogen atoms in the PANI backbone and an accompanying noncovalent interaction between alkyl chains of grafted PANI and hydrooxylated rGO is formed. ...

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Synthesis, characterization and electrochromic properties of a conducting copolymer of pyrrole functionalized polystyrene with pyrrole

Cited by 54 publications

References 35 publications

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

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

Piperazine Polymerization Catalyzed by Maghnite-H

Molecular‐Pillar‐Supported Functionalized Reduced Graphene‐Oxide for Energy Efficient Lubrication

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