Soluble ethylmercapto-substituted polythiophenes

Ruiz, Jose P.; Nayak, Kasinath; Marynick, Dennis S.; Reynolds, John R.

doi:10.1021/ma00193a039

Cited by 50 publications

(38 citation statements)

References 12 publications

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“…The first at 3105 cm À1 was attributed to the C-H stretching vibration, corresponding to the a-hydrogen of the ring. 40,44 This peak is remarkable in the monomer spectrum and almost imperceptible in the polymer spectrum. Everything indicates that the decrease in intensity in the latter case was due to loss of C-H bonds during polymerization.…”

Section: Structural Characterizationmentioning

confidence: 92%

Preparation and characterization of semiconducting polymeric blends. Photochemical synthesis of poly(3-alkylthiophenes) using host microporous matrices of poly(vinylidene fluoride)

et al. 2012

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Chemical and electrochemical synthesis techniques have been the principal methods of obtaining polymers in industry and scientific research laboratories. However, during the last two decades, photochemical synthesis, although poorly studied, has been reported to present several advantages, in that it is a fast and cheap technique, and it is not aggressive to the environment. The technique has been applied to the production of some conducting polymers. In this study, semiconducting polymeric blends composed of PT3AA-K-PVDF and PT3MA-PVDF were respectively obtained by photochemical polymerization in aqueous solutions of 3-thiophene acetic acid and 3-thiophene methyl acetate monomers using PVDF microporous matrices and potassium dichromate as catalyst. The percentage of products and by-products incorporated in the host matrix was obtained by gravimetric analysis. The chemical structures of the polymers synthesized were analyzed by FTIR, UV-vis and 1 H NMR. GPC analysis indicated the formation of oligomers composed of 5-6 mers. The morphology of the matrices and polymeric blends was observed by SEM-EDS and their electric behavior evaluated by measures of electric conductivity. The SEM images show the presence of polythiophene in the pores of the PVDF microporous membrane. The thermal properties of the polymers and their blends were evaluated by DSC and TGA. Thermal analysis by DSC demonstrated an increase in melting temperature of the blends, attributed to the confinement of PVDF crystalline phases for the polymer photosynthesized. The results of volumetric conductivity measurements of polymeric blends show an increase in conductivity in the matrices from 10 À15 to 10 À11 S cm À1 .

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Section: Structural Characterizationmentioning

confidence: 92%

Preparation and characterization of semiconducting polymeric blends. Photochemical synthesis of poly(3-alkylthiophenes) using host microporous matrices of poly(vinylidene fluoride)

et al. 2012

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“…The conductivity in irregular poly(3-ethylmercaptothiophene) powder samples is about 10 ±3 S/cm. [195] A recent study has shown that polymerization of (2,5-dibromo-3-butylthio)thiophene using Mg, followed by Ni(dppp)Cl 2 in refluxing anisole leads to an apparently regioregular poly [3-(butylthio)thiophene] [196] that has a molecular weight of 5k. This polymer, in contrast to the above Rieke polymer, is soluble in CHCl 3 , CCl 4 , toluene, benzene, THF, and CS 2 .…”

Section: Carboxylic Acid Derivatives: Self-assembly and Sensorsmentioning

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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“…The bands higher than 3000 cm À1 typically detect unsaturated compounds if the stronger main bands associated to hydrogen bonds formed by acid or alcohol groups do not hide them. According to Ruiz et al [38], the absorbance due to the aromatic CeH stretch at w3070 cm À1 can be attributed to the b-hydrogen whereas the band at w3090 cm À1 is related to the a-hydrogen position in the thiophene rings. These absorbances could not be identified in Fig.…”

Section: Modeling the Polymer: Prediction Of The Electronic Propertiementioning

confidence: 99%