Oxidation of aniline in dopant-free template-free dilute reaction media

Rakić, Aleksandra; Bajuk‐Bogdanović, Danica; Mojović, Miloš; Ćirić‐Marjanović, Gordana; Milojević-Rakić, Maja; Mentus, Slavko; Marjanović, Budimir; Stejskal, Jaroslav

doi:10.1016/j.matchemphys.2011.02.047

Cited by 32 publications

(23 citation statements)

References 54 publications

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“…1). 14,15,19,78,85 The redox-activity and paramagnetic behavior of nanostructured PANI was frequently confirmed, e.g., in the case of PANI-NRs prepared in the presence of tannic acid (Fig. 2).…”

Section: Polyaniline Nanostructuresmentioning

confidence: 73%

“…), as well dopant-free, falling-pH, "pH-stat" and hydrophobic surface methods for the synthesis of 1-D PANI nanostructures were also reported in the last decade. 14,15,20,21,33,80-89 The molecular structure of nanostructured PANIs obtained by the falling-pH method (starting from slightly acidic or neutral media) is much more complex than that of ordinary PANIs prepared in strongly acidic media (Scheme 3), 85 as was predicted by semi-empirical quantum chemical computations 29,31,32 and confirmed by spectroscopic data (Fig. 1).…”

Section: Polyaniline Nanostructuresmentioning

confidence: 89%

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Progress in conducting/semiconducting and redox-active oligomers and polymers of arylamines

Janošević¹,

Marjanović²,

Rakić

et al. 2013

JSCS

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Recent advances in synthesis, characterization and application of the selected conducting/semiconducting and redox-active oligomers and polymers of arylamines are reviewed. A brief historical background of the selected topics is given. The overview of the preparation, structure and properties of polyaniline, substituted polyanilines, especially those obtained by the oxidative polymerization of p-substituted anilines, poly(1-aminonaphthalene) and its derivatives, carbocyclic and heterocyclic polyaryldiamines such as poly(p-phenylenediamine) and polydiaminoacridines, is presented. The mechanism of formation of polyaniline nanostructures is discussed. Recent approaches to the preparation of one-dimensional polyaniline nanostructures are concisely reviewed, with special attention paid to the template-free falling-pH method. Current and potential future applications of oligo/polyarylamines are briefly discussed.

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Section: Polyaniline Nanostructuresmentioning

confidence: 73%

Section: Polyaniline Nanostructuresmentioning

confidence: 89%

Progress in conducting/semiconducting and redox-active oligomers and polymers of arylamines

Janošević¹,

Marjanović²,

Rakić

et al. 2013

JSCS

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“…The bands at ∼903 and ∼880 cm −1 are attributable to γ(C−H) vibrations of 1,2,4‐trisubstituted and/or 1,2,4,5‐tetrasubstituted benzenoid rings (one isolated H atom) [47, 48]. More pronounced branching of the PANI chains and/or the higher contents of short chains/branches in the composites with higher contents of TiO 2 nanoparticles (PT‐2 and PT‐3) compared with PT‐1 are indicated by the fact that the relative ratio of the intensities of the bands at 752 and 688 to 683 cm −1 (characteristic of mono‐ and 1,2‐disubstituted aromatic rings) to the intensity of the band at ∼820 cm −1 (characteristic of 1,4‐disubstituted aromatic rings) [47, 49] is remarkably higher in the FTIR spectra of PT‐2 and PT‐3 than in the sample PT‐1.…”

Section: Resultsmentioning

confidence: 99%

Ferromagnetic polyaniline/TiO₂ nanocomposites

et al. 2012

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Novel ferromagnetic semiconducting polyaniline PANI/TiO2 nanocomposites were synthesized by the oxidative polymerization of aniline with ammonium peroxydisulfate in an aqueous medium, in the presence of colloidal TiO2 nanoparticles (d ∼ 4.5 nm), without added acid. The morphological, magnetic, structural, and optical properties of the PANI/TiO2 nanocomposites prepared at initial aniline/TiO2 mole ratios 80, 40, and 20 were studied by scanning electron microscopy, superconducting quantum interference device, X‐ray powder diffraction, FTIR, Raman, and UV‐Vis spectroscopies. The emeraldine salt form of linear PANI chains as well as the presence of phenazine units, branched PANI chains, and anatase crystalline structure of TiO2 in PANI/TiO2 nanocomposites was confirmed by FTIR and Raman spectroscopies. The electrical conductivity of synthesized composites was ∼10−3 S cm−1. The room temperature ferromagnetic response with coercive field of Hc ∼ 300 Oe and the remanent magnetization of Mr ∼ 4.35 × 10−4 emu/g was detected in all investigated PANI/TiO2 nanocomposites. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers

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“…Regarding PAni and its special chemical property of doping and dedoping (ranging from acidic to basic medium), Feng et al (2011) and Rakic et al (2011) showed its suitable environmental stability and application versatility. This polymer can be produced in several oxidation states (leucoemeraldine, emeraldine, pernigraniline), each one characterized by a different structure, with several electrical properties and the ability to be produced by chemical or electrochemical synthesis (Tamburria et al 2011;Maia et al 2000;Sapurina and Stejskal 2010;Ćirić-Marjanović 2013).…”

Section: Introductionmentioning

confidence: 99%

Formation of Composite Polyaniline and Graphene Oxide by Physical Mixture Method

Vargas

Poli

Dutra

et al. 2017

J.Aerosp. Technol. Manag.

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The development of polyaniline and graphene oxide composites aims to join the unique properties of each material for aerospace applications. The present paper demonstrates an easy and quick method, compared to the ones found in the literature, to obtain a composite made with polyaniline doped with dodecylbenzenesulfonic acid, a combination commonly called polyaniline, and graphene oxide. Nowadays, the most common studied methods are electrochemistry and in situ chemical polymerization. Differently from these methods, the films were obtained by a physical mixture of equimolar suspension of graphene oxide (4 mg/mL) with 3 concentrations of polyaniline powder: 25; 50 and 75%, being compared to pure graphene oxide and polyaniline. The morphology and structure behavior of all the films were studied, besides the bonding nature between both materials. The films were analyzed by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and differential scanning calorimetry. The apparent interaction between graphene oxide corrugated sheets and polyaniline grains was verified by scanning electron microscopy images. It can be noticed, as the concentration of polyaniline increases, that more polymer was entrapped. To prove the formation of polyaniline/graphene oxide composite, X-ray diffraction and Fourier transform infrared spectroscopy techniques demonstrated the changes on graphene oxide crystallographic plans and on the chemical bonding between polyaniline and graphene oxide, suggesting an interaction between polyaniline and graphene oxide, especially in the composite with 50% polyaniline/50% graphene oxide. Differential scanning calorimetry was used to highlight this effect through the increase in thermal stability. The method of physical mixture was efficient to obtain the polyaniline/ graphene oxide composites.

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Oxidation of aniline in dopant-free template-free dilute reaction media

Cited by 32 publications

References 54 publications

Progress in conducting/semiconducting and redox-active oligomers and polymers of arylamines

Progress in conducting/semiconducting and redox-active oligomers and polymers of arylamines

Ferromagnetic polyaniline/TiO₂ nanocomposites

Formation of Composite Polyaniline and Graphene Oxide by Physical Mixture Method

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Oxidation of aniline in dopant-free template-free dilute reaction media

Cited by 32 publications

References 54 publications

Progress in conducting/semiconducting and redox-active oligomers and polymers of arylamines

Progress in conducting/semiconducting and redox-active oligomers and polymers of arylamines

Ferromagnetic polyaniline/TiO2 nanocomposites

Formation of Composite Polyaniline and Graphene Oxide by Physical Mixture Method

Contact Info

Product

Resources

About

Ferromagnetic polyaniline/TiO₂ nanocomposites