Electrochemical Doping Of Poly Research Articles

Electrochemical doping of poly(vinyl chloride) obtained by photodehydrochlorination from laminated poly(vinyl chloride) + polypyrrole films

Abstract The poly(vinyl chloride) (PVC) in laminated PVC + polypyrrol (PPy) films has been converted to an electrically conducting structure by photodehydrochlorination and subsequent electrochemical doping. The maximum conductivity (6 × 10 −1 S cm −1 ) of the PVC film was obtained by potentiostatic oxidation at 0.3 V vs. SCE in HCl solution. The reflection spectra of the PVC film showed a new band around 600 to 800 nm after the electrochemical doping, indicating the formation of a charge-transfer complex. The maximum conductivity of the PVC film was reached with the highest concentration of the charge transfer complex, polyene + … X − , formed between the photogenerated polyenes and dopant anions.

In situ IR spectroscopic study of poly(N-vinylcarbazole) film during electrochemical doping

In situ IR spectroscopic study was made on the electrochemical doping of poly(N-vinylcarbazole) (PVK) by the subtractively normalized interfacial Fourier transform technique. The results show that the doping of ClO4- anion is limited by crosslinking of the polymer. The structure of doped PVK film depends on electrode potential and reaction time. Maximum doping of PVK may be achieved using a low oxidation potential for a proper reaction time. (C) 1996 John Wiley & Sons, Inc.

Synthesis of a Novel Type of Electrochemically Doped Vinyl Polymer Containing Pendant Terthiophene and Its Electrical and Electrochromic Properties

A novel kind of electrochemically doped poly(5-vinyl-2,2':5',2''-terthiophene) has been prepared by electrochemical doping of poly(5-vinyl-2,2':5',2''-terthiophene) and by electrolytic polymerization of 5-vinyl-2,2':5',2''-terthiophene in the presence of tetra-n-butylammonium perchlorate as a supporting electrolyte. The electrochemically doped poly(5-vinyl-2,2':5',2''-terthiophene), obtained as bluish purple lustrous films, is identified as a partially oxidized radical-cation salt with ClO 4 - as a dopant, having a partially cross-linked structure due to the coupling reaction of the radical cation of the pendant terthiophene moiety. The polymer with a degree of doping of 45% exhibits a room-temperature conductivity of 2×10 -8 S cm -1 with an activation energy of 0.5 eV. The polymer undergoes a reversible clear color change from bluish purple to pale yellowish orange and vice versa on electrochemical dedoping and doping and functions as a novel class of potential electrochromic material

In situ spectroscopic investigation of the doping process in poly(3-octylthiophene)

Electrochemical doping of poly(3-octylthiophene) was studied by in situ optical absorption and in situ resonance Raman scattering. Absorption of polarons and, at higher doping levels, of bipolarons was observed. A strong decrease of luminescence and of main Raman lines was found particularly for the initial part of the doping process. The amplitude mode shifts about 30 cm −1 from the nearly undoped to the heavily doped state. This behaviour is attributed to the quenching of the Raman line of the undoped state and at higher doping levels to the simultaneous generation of the Raman line for the bipolaron configuration at lower wavenumbers.

Synthesis, properties and application of electrically conducting non-conjugated polymers having a pendant perylenyl group

In order to develop new types of electrically conducting polymers, novel non-conjugated polymers containing a perylenyl chromophore as the pendant group, poly(3-vinylperylene) and poly(3-perylenylmethyl methacrylate), have been investigated. Chemically-doped polymers obtained on exposure to iodine vapor exhibited room-temperature conductivities of 10 −6 S cm −1 for a sample of poly(3-vinylperylene) with a doping degree of ca. 32% and 10 −8 S cm −1 for a sample perylenylmethyl methacrylate) with a doping degree of ca. 17%. The electrochemically-doped poly(3-vinylperylene) with doping degrees of 71–86%, prepared by both electrolytic polymerization of 3-vinylperylene and electrochemical doping of poly(3-vinylperylene), exhibited room-temperature conuctivities of 10 −5 – 10 −4 S cm −1 with activation energies of ca. 0.3 – 0.4 eV. Poly(3-vinylperylene) was shown to function as a new type of cathode-active material for a rechargeable lithium battery.

Optical, electrical and ESR characterization of poly( p-phenylenesulfide) (pPPS) in concentrated sulfuric acid offers a during electrochemical doping

Electrochemical doping of poly( p-phenylenesulfide) (pPPS) in concentrated sulfuring acid offers a promising way for studying electrical properties of this material because an accurate control of the doping level is possible. We have performed an extensive investigation of the electrochemical behaviour of pPPS in 96% H 2SO 4 and, hence, measured in situ optical spectra, conductivity and ESR data of samples at different values of the injected charge; in this paper the results are presented and discussed in relation to data of pPPS and oligomers chemically doped.

Electrochemical doping of poly( p-phenylene sulfide) in concentrated sulfuric acid

This paper deals with the electrochemical doping of poly( p-phenylene sulfide) in concentrated sulfuric acid. Cyclic voltammetry curves, as well as cyclic voltabsorptiometry curves and electronic spectra at different values of injected charge, are reported. The electronic spectra are discussed in relation to those of chemically-doped pPPS.

Electrochemical Doping of Poly(3-vinylperylene) and Electrical Properties of Doped Polymers

Electrochemical Doping of Poly(3-vinylperylene) and Electrical Properties of Doped Polymers

Conductive polymers based upon rigid-rod ultrahigh-modulus macromolecules. Electrochemical doping of poly(p-phenylenebenzobisthiazole-2,6-diyl) (PBT)

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConductive polymers based upon rigid-rod ultrahigh-modulus macromolecules. Electrochemical doping of poly(p-phenylenebenzobisthiazole-2,6-diyl) (PBT)Patricia A. DePra, John G. Gaudiello, and Tobin J. MarksCite this: Macromolecules 1988, 21, 7, 2295–2297Publication Date (Print):July 1, 1988Publication History Published online1 May 2002Published inissue 1 July 1988https://doi.org/10.1021/ma00185a073RIGHTS & PERMISSIONSArticle Views102Altmetric-Citations23LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (427 KB) Get e-Alerts Get e-Alerts

Electrochemical doping of poly[4-(N,N-diphenylamino)phenylmethyl methacrylate], and rectification and photovoltaic properties

An insulating, photoconductive polymer, poly[4-(N,N-diphenylamino)-phenylmethyl methacrylate] (PDAPM), has been transformed into a semiconductive polymer by electrochemical doping. The electrochemically-doped PDAPM is a partially oxidized cation radical salt with ClO 4 − as a dopant, and its structure is partially cross-linked at the paraposition of the phenyl group in the triphenylamine moiety owing to the coupling reaction of the cation radical. The electrochemically-doped PDAPM film sandwiched between aluminum and gold electrodes shows rectification and photovoltaic effects.

Preparation and electrical properties of poly(3‐thienylacetylene)

Abstract3‐Thienylacetylene (1) was prepared by reaction of 3‐(2,2‐dichloro‐1‐fluorovinyl)thiophene with butyllithium in a 1 : 2 mole ratio, and subsequent hydrolysis. Polymerization of 1 with WCl6 and tetraphenyltin gave poly(1), poly[1‐(3‐thienyl)vinylene], which contained a small amount of benzene‐insoluble product. On heating poly(1) no weight loss was observed up to 240°C. At 500°C the weight loss was 18%. In differential scanning calorimetry, an exothermic peak appeared at 245°C. A pressed pellet, doped with iodine, exhibits conductivity of about 10−3 S/cm. The absorption spectrum of poly(1) shows a shoulder at 225 nm, a maximum absorption at 360 nm and tailing up to about 660 nm. In a solution of poly(1) and I2, a new absorption appeared in the near‐infrared region, but failed to develop enough to suggest high conductivity of poly(1) doped with iodine. The electrochemical doping of poly(1) and electrochemical polymerization of 1 gave no conducting products.

Polymers studied by modulated ellipsometry: The electrochemical doping of poly(methyl-3-thiophene) grafted on platinum

Abstract The electrochemical doping-undoping process, from an SC state to a metal-like one, of PMT films grafted on Pt electrodes was studied both in dynamic and static conditions. The difference in the Δ and ψ spectra for a same effective doping ratio suggested that doping species (ClO 4 − ) were more homogeneously distributed into the polymer in the latter conditions than in the former. That can be the explanation for the splitting of the ϵ 2 peaks observed during the dynamic doping and undoping sweeps, suggesting the presence of both polaron and bipolaron levels in the band gap.

Polymers studied by modulated ellipsometry: The electrochemical doping of poly(methyl-3-thiophene) grafted on platinum

The electrochemical doping-undoping process, from an SC state to a metal-like one, of PMT films grafted on Pt electrodes was studied both in dynamic and static conditions. The difference in the Δ and ψ spectra for a same effective doping ratio suggested that doping species (ClO 4 −) were more homogeneously distributed into the polymer in the latter conditions than in the former. That can be the explanation for the splitting of the ϵ 2 peaks observed during the dynamic doping and undoping sweeps, suggesting the presence of both polaron and bipolaron levels in the band gap.

Electrochemical doping of poly(N-vinylcarbazole) and poly(3,6-dibromo-N- vinylcarbazole) and their electrical conductivities

Electrochemical doping of poly(N-vinylcarbazole) and poly (3,6-dibromo-N- vinylcarbazole) in thin films coated on a platinum electrode in acetonitrile or in dichloromethane solution by means of potentiostatic anodic oxidation in the presence of tetra-n-bytylammonium perchlorate produced electrically conductive polymers with room temperature conductivities as high, as 6 × 10–4 S cm–1