Characteristics of vibration modes of polypyrrole on surface-enhanced Raman scattering spectra

Liu, Yuchuan

doi:10.1016/j.jelechem.2004.05.015

Cited by 85 publications

(38 citation statements)

References 61 publications

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“…From these results, we verified how synthesis parameters such as oxidation potentials had an influence on the electrochemical properties of the PPP-PPY films. Polypyrrole (PPY) films have been most often related to interesting properties such as high conductivity and stability in air [13][14][15] when prepared in both aqueous and nonaqueous media, and at relatively low oxidation potentials 16,17 . Here, we verified that the electropolymerization of biphenyl and pyrrole allows one to decrease the oxidation potential necessary to obtain PPP-PPY films in acetonitrile.…”

Section: Introductionmentioning

confidence: 99%

Electrosynthesis and optical characterization of poly(p-phenylene), polypyrrole and poly(p-phenylene)-polypyrrole films

et al. 2014

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Poly(p-phenylene) (PPP), polypyrrole (PPY), and poly(p-phenylene-pyrrole) (PPP-PPY) films were electrochemically synthesized in acetronitrile by cyclic voltammetry. For comparison purposes, the films were characterized by cyclic voltammetry in a monomer-free solution, and their optical responses were also obtained in the UV-VIS range of energy after varying the applied potentials. The absorbance spectra of the PPP-PPY film exhibited bands typically seen in the spectra of the homopolymers, PPP and PPY films, but better defined, intense, and related to reversible color transitions. Although it was not possible to confirm by using infrared and Raman spectroscopy that a copolymer was in fact obtained, the presence of both monomers, pyrrole and biphenyl, in the polymerization medium turned easier the process of film formation, yielding darker, more uniform, and rougher films as it was verified by photographic images and AFM (atomic force microscopy) images.

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Section: Introductionmentioning

confidence: 99%

Electrosynthesis and optical characterization of poly(p-phenylene), polypyrrole and poly(p-phenylene)-polypyrrole films

et al. 2014

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“…The polystyrene latex bands (and their relative intensities) correlate very well with those observed for the reference standard. For polypyrrole, there is a wide range of literature available (e.g., Oddi et al 1986;Inoue et al 1987;Liu 2004;Chuang et al 2005); in Table 3 we refer to band assignments from Liu (2004), who, using a He-Ne laser as here, reported that Raman spectral features obtained using surface-enhanced Raman spectroscopy varied according to the electrical conductivity of the polypyrrole. Again, there is generally good agreement between our spectra and these literature spectra.…”

Section: Resultsmentioning

confidence: 99%

“…(ASTM E 1840) 620.9, 795.8, 1001.4, 1031.8, 1155.3, 1450.5, 1583.1, 1602.3, 2852.4, 2904.5, 3054.3 Polypyrrole: (Liu 2004) 918-932 (counter anions), 1042-1053 and 1082-1083 (N-H in-plane deformation), 1329-1333 and 1377-1412 (ring stretching), 1599-1613 (C = C bond stretching).…”

Section: Resultsmentioning

confidence: 99%

Extent of thermal ablation suffered by model organic microparticles during aerogel capture at hypervelocities

Burchell

Foster

Ormond-Prout

et al. 2009

Meteorit & Planetary Scien

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Abstract-New model organic microparticles are used to assess the thermal ablation that occurs during aerogel capture at speeds from 1 to 6 km s −1 . Commercial polystyrene particles (20 µm diameter) were coated with an ultrathin 20 nm overlayer of an organic conducting polymer, polypyrrole. This overlayer comprises only 0.8% by mass of the projectile but has a very strong Raman signature, hence its survival or destruction is a sensitive measure of the extent of chemical degradation suffered. After aerogel capture, microparticles were located via optical microscopy and their composition was analyzed in situ using Raman microscopy. The ultrathin polypyrrole overlayer survived essentially intact for impacts at ~1 km s −1 , but significant surface carbonization was found at 2 km s −1 , and major particle mass loss at ≥3 km s −1 . Particles impacting at ~6.1 km s −1 (the speed at which cometary dust was collected in the NASA Stardust mission) were reduced to approximately half their original diameter during aerogel capture (i.e., a mass loss of 84%). Thus significant thermal ablation occurs at speeds above a few km s −1 . This suggests that during the Stardust mission the thermal history of the terminal dust grains during capture in aerogel may be sufficient to cause significant processing or loss of organic materials. Further, while Raman D and G bands of carbon can be obtained from captured grains, they may well reflect the thermal processing during capture rather than the pre-impact particle's thermal history.

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“…Figure 6 (C and D) show the Raman spectra of PPy, PPyÀRu, PPyÀCu, PPyÀCo and PPyÀCuCo. PPy presents Raman peaks at 931, 1060, 1094 cm À1 corresponding to CÀH ring deformation vibration, [60,61] the peak at 1248 cm À1 corresponding to CÀH in-plane bending vibration, [62] and the peaks at 1359, 1497 and 1579 cm À1 corresponding to CÀN stretching vibration, CÀC stretching vibration and C=C stretching vibration, respectively. [62,63] PPyÀRu and PPy display the similar characteristic Raman peaks.…”

Section: Confirmation Of Metallic-coordinated Ppymentioning

confidence: 99%

Electrochemical Performance of Transition Metal‐Coordinated Polypyrrole: A Mini Review

Xie

2019

The Chemical Record

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The conductive polymer of polypyrrole can be acted as electroactive electrode material of supercapacitor due to reversible redox behavior and high capacitance. It usually suffers from low electrochemical stability due to the breakdown of polymer molecule chain in the long‐term charge and discharge process. The monometallic or bimetallic‐coordinated polypyrrole usually exhibits the improved electrochemical performance. The transition metal ions such as ruthenium, iron, copper and cobalt are adopted for the coordination modification. The transition metal‐coordinated polypyrrole includes the intrachain and interchain coordination structure between transition metal ion and nitrogen atom of pyrrole ring. It is able to reinforce the polymer molecule chain strength to overcome excessive volumetric swelling and shrinking during charge‐discharge process, improving the cycling stability and rate capability of polypyrrole. Accordingly, the transition metal‐coordinated polypyrrole keeps simultaneously high capacitance performance and electrochemical stability, acting as the promising conductive polymer‐based supercapacitor electrode material for effective energy storage.

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Characteristics of vibration modes of polypyrrole on surface-enhanced Raman scattering spectra

Cited by 85 publications

References 61 publications

Electrosynthesis and optical characterization of poly(p-phenylene), polypyrrole and poly(p-phenylene)-polypyrrole films

Electrosynthesis and optical characterization of poly(p-phenylene), polypyrrole and poly(p-phenylene)-polypyrrole films

Extent of thermal ablation suffered by model organic microparticles during aerogel capture at hypervelocities

Electrochemical Performance of Transition Metal‐Coordinated Polypyrrole: A Mini Review

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