Synthesis and properties of chemically coupled poly(thiophene)

Kobayashi, Masao; Chen, Jorge; Chung, Tze-chiang; Moraes, Fernando; Heeger, Alan J.; Wudl, Fred

doi:10.1016/0379-6779(84)90044-4

Cited by 361 publications

(117 citation statements)

References 11 publications

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“…The main distribution (D2) found in fully converted PPV film has a g factor of 2.004, indicating that the species responsible for the spin resonance is a carbon-centered defect in the polymer backbone [24,25]. The value obtained is close to that reported previously in PPV [26] and a little higher than those corresponding to radicals in systems (typically 2.002).…”

Section: Esr Measurementsupporting

confidence: 79%

Thermal conversion of poly(paraphenylene-vinylene) precursor films: XPS and ESR studies

Nguyen

Rendu

Tran³

et al. 1998

Polym. Adv. Technol.

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The conversion of the precursor into poly(phenylene–vinylene) (PPV) was studied by means of photoelectron spectroscopy (XPS) and electron spin resonance (ESR) on precursor films synthesized from the polymerization of pxylene‐tetrahydrophenium halides. The sulfonium precursor containing chlorine or bromine was thermally converted to PPV and analyzed in situ using the spectrometers. It was found by XPS analysis that both halide precursors were thermally converted into polymer in a range of 190–250°C but traces of bromine were still present at >300 °C in the precursor containing Br. Furthermore, a small amount of oxygen in a ketone structure was also present in fully converted films. The ESR results corroborated the XPS experiments, showing a progressive disappearance of the radical distribution related to sulfur sites in a comparable temperature range. A discussion of the conversion process is given in terms of the modification of the core level spectra from XPS and the g distributions from ESR experiments. © 1997 John Wiley & Sons, Ltd.

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Section: Esr Measurementsupporting

confidence: 79%

Thermal conversion of poly(paraphenylene-vinylene) precursor films: XPS and ESR studies

Nguyen

Rendu

Tran³

et al. 1998

Polym. Adv. Technol.

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“…[5,14] In this synthesis a 2,5-diiodo-3-alkylthiophene (6) (Scheme 4) is treated with one equivalent of Mg in THF, generating a mixture of Grignard species. A catalytic amount of Ni(dppp)Cl 2 is then added and the polymer is generated by a halo-Grignard coupling reaction.…”

Section: Chemical Synthesis Of Patsmentioning

confidence: 99%

The Chemistry of Conducting Polythiophenes

McCullough¹

1998

Adv. Mater.

1,477

912

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Directing the structure and function of polythiophenes (PTs) can lead to remarkable enhancements in the electronic and photonic properties of the resultant materials, as discussed in this comprehensive review of the chemistry and synthesis of PTs. The Figure illustrates the use of heteroatom‐functionalized PTs as chemical sensors: upon ion complexation PT conjugation is greatly reduced, leading to a sensory response.

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“…This value is lower than that by Grinard reaction method. 7 However compared with the synthesized polymer by the Grinard method, both polymers showed the same ratio of CHC1 3 -soluble fraction. This means that the molecular weight distributions of these are similar.…”

Section: Resultsmentioning

confidence: 99%

Reductive Polymerization of Halothiophene

Kitada

Ozaki

1995

Polym J

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ABSTRACT:The reductive preparation of poly(thiophene) and copolymers from 2,5-dibromothiophene and tetrabromothiophene is described. In this reaction, hydrazine and palladium catalysts were used. Yield of the polymer was 65% when 2,5-dibromothiophene was used as a monomer. Electric conductivity of the polymer was 1 x 10-5 S cm -1 (1 2 20 wt¾) and 1 x 10-3 S cm -1 (12 50 wt¾). The polymer had 1.6 wt¾ of bromine residue. As the mixing ratio of 2,5-dibromothiophene to tetrabromothiophene decreased, yield of the polymer decreased. A polymer from tetrabromothiophene gave yield of 41 %. As for electric conductivity, the polymer prepared from only 2,5-dibromothiophene gave a higher value than copolymers of 2,5-dibromothiophene and tetrabromothiophene. Increasing the a mixing ratio of tetrabromothiophene caused a decrease of the conductivity. The polymer from tetrabromothiophene gave electric conductivity of -10-6 -10-7 Scm-1 (1 2 20wt%).KEY WORDS Poly(thiophene) / 2,5-Dibromothiophene / Tetrabromothiophene / Palladium / Reductive Polymerization / of these polymers were measured.

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Synthesis and properties of chemically coupled poly(thiophene)

Cited by 361 publications

References 11 publications

Thermal conversion of poly(paraphenylene-vinylene) precursor films: XPS and ESR studies

Thermal conversion of poly(paraphenylene-vinylene) precursor films: XPS and ESR studies

The Chemistry of Conducting Polythiophenes

Reductive Polymerization of Halothiophene

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