Raman spectroelectrochemical study of polyaniline and sulfonated polyaniline in solutions of different pH

Mažeikienė, Regina; Tomkutė, Vita; Kuodis, Zenonas; Niaura, Gediminas; Malinauskas, Albertas

doi:10.1016/j.vibspec.2006.09.005

Cited by 98 publications

(39 citation statements)

References 23 publications

(21 reference statements)

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“…The first absorption peak was assigned to π-π * transition of the benzenoid rings and the second was attributed to the transition of benzenoid rings into quinoid rings ( Laska & Widlarz 2005;Kan et al 2006). The results (UV-Vis characterization of PANI) obtained in this study are in close agreement with the literature values (Laska &Widlarz 2005;Kan et al 2006;Singh et al 2008;Mazeikiene et al 2007;Kang, Neoh & Tan 1998). The FTIR absorption band at 3325 cm −1 was assigned to N-H stretching of the amine group of polyaniline (spectrum not shown).…”

Section: Spectroscopic Characterization Of Polyanilinesupporting

confidence: 89%

Indirect Amperometric Determination of Selected Heavy Metals Based on Horseradish Peroxidase Modified Electrodes

Nomngongo¹,

Ngila²,

Msagati³

2011

Biosensors - Emerging Materials and Applications

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Section: Spectroscopic Characterization Of Polyanilinesupporting

confidence: 89%

Indirect Amperometric Determination of Selected Heavy Metals Based on Horseradish Peroxidase Modified Electrodes

Nomngongo¹,

Ngila²,

Msagati³

2011

Biosensors - Emerging Materials and Applications

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“…3. PAni-B spectra presented characteristic bands at 1170 (C-H bending); 1206 (C-N stretching); 1502 (C=N stretching); 1560 (N-H bending) and 1598 cm −1 (C=C stretching) (Mažeikienė et al 2007;Cirić-Marjanović et al 2008;Moravková et al 2012). PAni-DBSA spectra, in turn, presented characteristic bands at 1190 (C-H bending); 1,260 (C-N stretching); 1,343 (C-N + stretching); 1,530 (C-C stretching); and 1620 cm −1 (C-H stretching) (Nobrega et al 2012;Ibrahim 2013;Shakoor and Rizvi 2010).…”

Section: Raman Spectroscopymentioning

confidence: 99%

Structural and Morphological Characteristics of Polyaniline Synthesized in Pilot Scale

Mazzeu

Faria

Cardoso

et al. 2017

J.Aerosp. Technol. Manag.

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AbstrAct:Polyanilines have many applications in Aerospace, especially in their doped form. Studies on their synthesis in a pilot scale can contribute to obtain products with desirable characteristics for such applications. The present study reports the chemical oxidative synthesis of polyaniline in pilot scale and different reaction times in order to determine if there are variations in the polyaniline structure, morphology and conductivity due to these synthesis conditions. It is very common to analyze these data for polymers obtained through bench scale. However, several parameters change the properties of final material in major scales, such as thermal, mechanic and diffusive variables. Therefore, the reaction time is the only variable into the 9 syntheses carried out, and polyaniline is obtained in a doped form, being dedoped with ammonium hydroxide and redoped with dodecylbenzenesulphonic acid. The doped and redoped samples were characterized by their molecular structure, thermal behavior, crystallinity and morphology. The electrical conductivity of redoped samples was determined. Some differences in the structure and morphology of doped and dedoped forms, identifying the doping structures, were reported. This paper aims to present the relationship between changes on structure and morphology of doped and undoped polyaniline obtained by the mentioned experiments. Furthermore, some addicts on conductivity are carried out. It was possible to contribute in order to obtain a more conductive polyaniline in pilot scale.

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“…PANI complexes with HMW polyacid (Fig. 8a presents spectra of PANI/PA-4) demonstrate behavior similar to common PANI (Table 4) [37]: during the reduction, we observe gradual growth of 1620 cm −1 band (indicating an increase of the benzenoid (B) ring content in PANI macromolecule) and corresponding decrease of Raman intensity near 1580 and 1486 cm −1 (indicating a decrease of the quinoid (Q) structure content in the polymer). Simultaneously, we observe splitting of the radical cation band near 1340 cm −1 and a shift of >C-H in-plain bending vibration from 1170 to 1192 cm −1 which also characterizes the reduction process.…”

Section: Pani Film Propertiesmentioning

confidence: 65%

On the nature of influence of polyelectrolyte molecular weight on aniline electropolymerization

Грибкова

Omelchenko

Некрасов

et al. 2015

J Solid State Electrochem

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Electrodeposition of polyaniline (PANI) complexes with a polymeric sulfonic acid of variable molecular weight has been studied with the purpose to explain specific features of aniline electropolymerization in the presence of polyelectrolytes. Poly-(2-acrylamido-2-methyl-1-propanesulfonic acid) (PAMPSA) was taken as a model polyelectrolyte due to the ease of varying its molecular weight during polymerization of the monomer. Depending on the polyacid molecular weight, crucial changes in the shape of charge-and potential-time dependences and cyclic voltammograms have been observed during potentiostatic, galvanostatic, and cyclic voltammetry syntheses of PANI, respectively. The results are considered in terms of the influence of molecular weight on proton condensation ability of the polyacid and, therefore, on the degree of aniline protonation and its local concentration in the vicinity of polyacid macromolecule. The PANI films obtained are characterized by cyclic voltammetry and UV-vis and Raman spectroelectrochemistry, and the influence of the polyacid molecular weight on these properties is discussed.

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Raman spectroelectrochemical study of polyaniline and sulfonated polyaniline in solutions of different pH

Cited by 98 publications

References 23 publications

Indirect Amperometric Determination of Selected Heavy Metals Based on Horseradish Peroxidase Modified Electrodes

Indirect Amperometric Determination of Selected Heavy Metals Based on Horseradish Peroxidase Modified Electrodes

Structural and Morphological Characteristics of Polyaniline Synthesized in Pilot Scale

On the nature of influence of polyelectrolyte molecular weight on aniline electropolymerization

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