Molecular Assembled Self-Doped Polyaniline Interlayer for Application in Polymer Light-Emitting Diode

Yang, Chien‐Hsin; Chih, Yi-Kai

doi:10.1021/jp0612174

Cited by 28 publications

(21 citation statements)

References 23 publications

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“…The molecular structures of the SPAN micro/nanostructures were determined by FT-IR spectroscopy, which reveales that SO surfactant-directing polymerization, [13][14][15] have been proven to be effective to synthesize polyaniline nanofibers, however, soft templates including micelles, [16][17][18][19][20][21][22][23] the falling pH method, [24] and liquid droplets, [25] seem to be promising for the synthesis of hollow polyaniline microspheres and nanotubes. Among the derivatives of polyaniline, self-doped polyaniline (SPAN) has received intensive interest because of the inner dopants bound to a polymer backbone differing from the external dopants of polyaniline, which have potential applications in rechargeable batteries, [26] biosensors, [27] light-emitting diodes, [28] and electrochromic devices. [29] Epstein et al [30] have synthesized SPAN by the sulfonation of the emeraldine base of polyaniline with fuming sulfuric acid followed by precipitation of the products with methanol and acetone.…”

Section: Introductionmentioning

confidence: 99%

“…SPAN can be directly fabricated by chemical or electrochemical oxidation copolymerization of aniline and aniline derivatives that bear ring-substituted groups such as sulfonic, boronic, and carboxylic acids. [31][32][33][34] However, only SPAN nanoparticles, [31] nanofibers, [32] and films [28,29] are obtained. To the best of our knowledge, no hollow SPAN micro/nanostructures were obtained.…”

Section: Introductionmentioning

confidence: 99%

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Hollow Self‐Doped Polyaniline Micro/Nanostructures: Microspheres, Aligned Pearls, and Nanotubes

Zhang

Peng

et al. 2008

Macromol. Rapid Commun.

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Hollow self‐doped polyaniline (SPAN) micro/nanostructures, such as hollow microspheres, aligned pearls, and nanotubes, have been synthesized by a one‐step chemical oxidation copolymerization of aniline (AN) and m‐aminobenzenesulfonic acid (SAN) using ammonium peroxydisulfate (APS) as the oxidant in aqueous solution. The process is facile and free of any template, surfactant, and external dopants. The shapes and sizes of the hollow SPAN micro/nanostructures can be controlled by adjusting the synthetic parameters, such as the molar ratios of AN and SAN, the concentrations of monomers, and the molar ratios of the monomer and APS. The formation of hollow SPAN micro/nanostructures is possibly related to the self‐assembly of SPAN oligomers at the early stage of the copolymerization reaction. The molecular structures of the SPAN micro/nanostructures were determined by FT‐IR spectroscopy, which reveales that SO groups are bonded to the aromatic rings in SPAN chains.magnified image

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hollow Self‐Doped Polyaniline Micro/Nanostructures: Microspheres, Aligned Pearls, and Nanotubes

Zhang

Peng

et al. 2008

Macromol. Rapid Commun.

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13] For example, applications using PANI nanostructures include: nanoparticles for biosensors, [14] fibers [8] and wires [15] for chemical sensors, nanotubes and nanocomposites for electrochromic devices and supercapacitors, [16] and nano-films and structurally periodic materials for light-emitting diodes. [17] Despite significant progress in the synthesis of PANI nanostructures, there remains significant limitations including low yield, limited processability, as well as poor mechanical, thermal and environmental stability. Furthermore, no method has yet been developed that enables the systematic variation of nanostructures that can be used to adequately investigate important structure/property relationships.…”

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confidence: 99%

Conducting Poly(anilineboronic acid) Nanostructures: Controlled Synthesis and Characterization

Deore¹,

Yu²,

Woodmass³

et al. 2008

Macro Chemistry & Physics

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Self‐doped poly(anilineboronic acid) (PABA) nanostructures have been prepared by chemical polymerization in an aqueous acid solution and aliphatic alcohols. In aliphatic alcohols, PABA is soluble under the polymerization conditions. According to 11B NMR studies, the formation of anionic tetrahedral boronate ester in aliphatic alcohols in the presence of fluoride forms the basis of self‐doped, soluble PABA. Transmission electron microscope images show the formation of nanostructures with different shapes and forms in different solvents after precipitation of the polymer as a result of ion exchange in the presence of 0.5 M HCl. The spectroscopic and cyclic voltammetric results confirm the formation of conducting PABA nanostructures in high yield. The conductivity of PABA thin films made from the nanostructures prepared in aqueous acid, methanol, ethanol and 1‐propanol is approximately 15 and 3.0, 2.1 and 1.9 S · cm−1, respectively. The conducting PABA nanostructures are processable since they are easily re‐dispersed in the various solvents up to approximately 5 mg · mL−1. UV‐vis kinetic measurements, XPS and 11B NMR results suggest that the formation of various nanostructures is influenced by the polymerization rate, the degree of self‐doping versus external doping, and the polarity of the solvents used. The PABA nanostructured films produced from these structures exhibit enhanced redox stability in a wider potential window in non‐aqueous media compared to polyaniline due to formation of six‐member heterocyclic complexes containing a boron‐imine dative bond resulting in a self‐doped self‐cross‐linked polymer. The degree of crosslinking depends on the nature of nanostructures. In non‐aqueous media, the self‐doped, self‐cross‐linked PABA nanostructured films are much less susceptible to cathodic and anodic degradation at extreme potentials, overcoming a major limitation of more common conducting polymers.magnified image

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“…The considerable electrochemical and physicochemical properties result in conducting polymers having various practical applications [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Poly(vinyl phosphonic acid) (PVPA)–BaFe12O19 Nanocomposite

Durmuș

Kavas

Sözeri

et al. 2012

J Supercond Nov Magn

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We present a method for the fabrication of PVPA/ BaFe 12 O 19 nanocomposite by in-situ polymerization of vinyl phosphonic acid, VPA in the presence of synthesized BaFe 12 O 19 NPs. Nanoparticles and the nanocomposite were analyzed by XRD, FTIR, TGA, SEM, TEM, VSM, and conductivity techniques for structural and physicochemical characteristics. Nanoparticles, identified as BaFe 12 O 19 from XRD analysis, were successfully coated with PVPA and the linkage was assessed to be via P-O bonds. Electron microscopy analysis revealed aggregation of BaFe 12 O 19 particles and dominantly platelet morphology upon composite formation. TGA analysis revealed the composition of the nanocomposite as 65% BaFe 12 O 19 and 35% polymer. Magnetic evaluation revealed that adsorption of PVPA anions during the preparation of the nanocomposite strongly influenced the magnetic properties resulting in much lower saturation magnetization values. DC conductivity measurements were used to calculate activation energy of PVPA/BaFe 12 O 19 nanocomposite and it was obtained as 0.37 eV.

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Molecular Assembled Self-Doped Polyaniline Interlayer for Application in Polymer Light-Emitting Diode

Cited by 28 publications

References 23 publications

Hollow Self‐Doped Polyaniline Micro/Nanostructures: Microspheres, Aligned Pearls, and Nanotubes

Hollow Self‐Doped Polyaniline Micro/Nanostructures: Microspheres, Aligned Pearls, and Nanotubes

Conducting Poly(anilineboronic acid) Nanostructures: Controlled Synthesis and Characterization

Poly(vinyl phosphonic acid) (PVPA)–BaFe12O19 Nanocomposite

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