Raman spectra of polypyrrole and its 2,5-13C-substituted and C-deuterated analogues in doped and undoped states

Furukawa, Yukio; Tazawa, Shuhei; Fujii, Y.; Harada, Issei

doi:10.1016/0379-6779(88)90309-8

Cited by 338 publications

(153 citation statements)

References 44 publications

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“…The CAA/PPy spectrum shows bands at 1608 (s), 1500 (w), 1378 (s), 1315 (s), 1250 (m), 1213 (sh), 1076 (m), 1049 (m), 973 (m), 934 (s), 873 (sh), 695 (w) and 634 (w) cm -1 . These bands are in agreement with the spectrum previously described of polypyrrole in its oxidized form, which shows the presence of polarons and bipolarons 31,32 (bands at 1378, 1250, 1076 and 973 cm -1 ). These bands are not observed in the reduced polypyrrole spectrum and are attributed to the mobile species in polypyrrole 31,32 .…”

Section: Resultssupporting

confidence: 79%

Synthesis and characterization of organic-inorganic hybrids formed between conducting polymers and crystalline antimonic acid

Beleze¹,

Zarbin²

2001

J. Braz. Chem. Soc.

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Neste trabalho são relatadas e discutidas a síntese e a caracterização de dois materiais híbridos orgânico-inorgânico, formados entre o ácido antimônico cristalino (AAC), como fração inorgânica, e dois polímeros condutores (polipirrol e polianilina) como fração orgânica. Os híbridos foram obtidos a partir da polimerização oxidativa in situ dos monômeros, utilizando-se o próprio AAC como agente oxidante, a partir da redução dos átomos de Sb(V) presentes em sua estrutura. Os materiais foram caracterizados por espectroscopias infravermelho e Raman, voltametria cíclica, difratometria de raios-X, análise elementar CHN e espectroscopia de ressonância paramagnética eletrônica. Os resultados evidenciaram que ambos os polímeros foram formados em sua forma oxidada, com a própria estrutura do AAC atuando como contra-íon.In this paper we report the synthesis and characterization of novel organic-inorganic hybrid materials between the crystalline antimonic acid (CAA) and two conductive polymers: polypyrrole and polyaniline. The hybrids were obtained by in situ oxidative polymerization of monomers by the Sb(V) present in the pyrochlore-like CAA structure. The materials were characterized by infrared and Raman spectroscopy, X-ray diffraction, cyclic voltammetry, CHN elemental analysis and electronic paramagnetic resonance spectroscopy. The results showed that both polymers were formed in their oxidized form, with the CAA structure acting as a counter anion.

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Section: Resultssupporting

confidence: 79%

Synthesis and characterization of organic-inorganic hybrids formed between conducting polymers and crystalline antimonic acid

Beleze¹,

Zarbin²

2001

J. Braz. Chem. Soc.

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“…The fact that Raman spectroscopy is based on scattering phenomena leads to the possibility of analysis of insoluble samples that require no sample preparation. inter-ring C-C str N-C and C-C str C-C str C-H def Ring def, sym Several Raman studies of polypyrrole have been published previously where the source used generally has a wavelength of 5 14.5 nm (14,15). A list of generally accepted assignments is provided in Table 1.…”

mentioning

confidence: 99%

Raman and resonance-Raman spectra of polypyrrole with application to sensor – gas probe interactions

Vigmond¹,

Ghaemmaghami²,

Thompson³

1995

Can. J. Chem.

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Raman spectra of the oxidized and neutral forms of polypyrrole show a relative intensity shift from the high wave number region to the low wave number region as the source wavelength is increased from 514.5 to 1064 nm. Variations in band positions are also observed with changes in excitation source; particularly, two C=C stretches at 1500 and 1605 cm−1 can be observed with the neutral polymer but only a single band is observed at 1575 cm−1 when sources of higher energy are used. These changes arise from differences in the electronic states of the two forms that can greatly alter the intensities of the numerous bands. The oxidized and neutral forms of the polymer both act as electron acceptors towards the gas phase species tested here (toluene, water, methanol, and ammonia). The increased electron density induces an upward shift of the peaks at 915 and 1035 cm−1 of the neutral polymer and increases the relative intensity of the 1575 cm−1 peak of the oxidized polymer using 1064 and 514.5 nm sources, respectively. Keywords: polypyrrole, Raman spectroscopy, gas probe interactions.

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“…This band is characteristic of the bipolaronic structure (quinoid form) in the oxidized state and is attributed to out-of-plane C-H deformation. Additionally, two bands characteristic of the polaronic structure (aromatic form), at 982 and 1047cm − 1 , assigned to ring deformation mode and CH in-plane deformation mode respectively, increased when the Fe 3 O 4 is present in the composite (Furukawa et al, 1988). Both the bands at 1500 and 982cm − 1 are assignable to aromatic segments but these are also present at the most oxidized state.…”

Section: Physical Chemical Interaction and Stabilization Of The Polymermentioning

confidence: 90%

“…The spectra present the characteristic bands already attributed to PPy vibrational modes located at 1592, 1382, 1320, 1252, 1082, 1047, 982 and 931cm −1 (Santos et al, 2007). By comparing with reported data by in-situ Raman studies (Furukawa et al, 1988;Santos et al, 2007), it is clear that the polymer is in the oxidized state where both aromatic and quinoid structures coexist indicating a pseudoequilibrium between polaronic and bipolaronic structures at the same oxidation level as already pointed out by Santos (Santos et al, 2007) and Furukawa (Furukawa et al, 1988). Figure 9 shows that the intensity of the band at 931cm − 1 decreases when the Fe 3 O 4 is in the film.…”

Section: Physical Chemical Interaction and Stabilization Of The Polymermentioning

confidence: 97%

Electrodeposition of Polypyrrole Films: Influence of Fe3O4 Nanoparticles and Platinum Co-Deposition

Montoya¹,

Marín²,

Calderón³

et al. 2012

Aspects on Fundaments and Applications of Conducting Polymers

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Raman spectra of polypyrrole and its 2,5-13C-substituted and C-deuterated analogues in doped and undoped states

Cited by 338 publications

References 44 publications

Synthesis and characterization of organic-inorganic hybrids formed between conducting polymers and crystalline antimonic acid

Synthesis and characterization of organic-inorganic hybrids formed between conducting polymers and crystalline antimonic acid

Raman and resonance-Raman spectra of polypyrrole with application to sensor – gas probe interactions

Electrodeposition of Polypyrrole Films: Influence of Fe3O4 Nanoparticles and Platinum Co-Deposition

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