Polymerization of 3-alkylthiophenes with FeCl3

Niemi, V.; Knuuttila, Pekka; Österholm, J.‐E.; Korvola, Jorma

doi:10.1016/0032-3861(92)90138-m

Cited by 161 publications

(112 citation statements)

References 9 publications

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“…Therefore, ferric chloride acts as an oxidant and it initiates the radical oxidative cationic polymerization of thiophenes. (Niemi, Knuuttila, & Osterholm, 1992) One of the possible mechanisms of thiophene polymerization is shown in Fig. 6.…”

Section: Tlc Of the Hsfmentioning

confidence: 99%

One Step Synthesis of Polythiophenes from the Partially Purified Crude Extract of the Roots of Tagetes Erecta

Kodithuwakku

Alwis²,

Prashantha³

et al. 2016

IJC

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Polythiophene and its derivatives are valuable conjugated polymers due to their physical properties and applications in various fields. Precursors of polythiophenes were conventionally obtained from petrochemical byproducts, which are non-renewable. Thiophene and its derivatives had been found naturally in Tagetes species such as Tagetes erecta, Tagetes tenuifolia, etc. Tagetes species produce 2, 2':5', 2''-terthienyl (Alpha-T), 5-(3-buten-1-ynyl)-2, 20-bithienyl (BBT), 5-(4-hydroxy-1-butynyl)-2, 20-bithienyl (BBTOH), and 5-(4-acetoxy-1-butynyl)-2, 20-bithienyl (BBTOAc), which are accumulated in different parts, specifically in the roots of the plants. These thiophene derivatives were extracted and identified by GC-MS, Uv-vis, FTIR and TLC analysis. The partially purified plant extract is polymerized through one step oxidative free radical polymerization to obtain polythiophenes. Product characterization has revealed that the selective polymerization of thiophene derivatives results in the phase-separated end product from the rest of the materials in the plant-extract.

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Section: Tlc Of the Hsfmentioning

confidence: 99%

One Step Synthesis of Polythiophenes from the Partially Purified Crude Extract of the Roots of Tagetes Erecta

Kodithuwakku

Alwis²,

Prashantha³

et al. 2016

IJC

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“…The problem of the PT solubility was overcome by the introduction of different groups at 3 or 3,4-position of thiophene ring to obtain the polythiophene derivatives. Several polythiophenes derivatives have been synthesized by chemical or electrochemical methods [4][5][6][7] . Besides processability, the polythiophene derivatives can also be fully characterized by chemical and physical methods.…”

Section: Introductionmentioning

confidence: 99%

Structural and thermal properties of carboxylic acid functionalized polythiophenes

et al. 2014

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Polythiophenes functionalized with polar groups at the end of side-chain have emerged as an alternative method to obtain good compatibility between this class of conjugated polymers and electron acceptor compounds. The aim is to prevent phase segregation and to improve the efficiency of the polythiophene technological devices. However, homopolymers synthesized from thiophene rings with high polar groups at the end of the side-chain, such as hydroxyl and carboxylic acid groups, are poorly soluble in common volatile organic solvents. We report on a systematic preparation of copolymers of 3-hexylthiophene (HT) and thiophene-3-acetic acid (TAA), using different feed ratios. The chemical structures of the copolymers were confirmed by FTIR and 1 H-NMR. The TAA content in these copolymers were 33, 38 and 54 mol %. HPSEC results did not show any remarkable correlation with TAA contents in the copolymers. In contrast, the thermal analyses showed a decrease in the thermal stability and an increase in rigidity of their backbones, for the copolymers with high amounts of TAA. The solubility and optical property of copolymers were also related to the TAA contents. Thus, the properties of these copolymers can be modulated by a simple control of feed ratio of TAA in the copolymerization.

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“…The synthetic route we have used to polymerize the monomer 3-Octylthiophène (3OT) is the traditional FeCl 3 method shown as Scheme 1, in which 3OT is oxydatively polymerized by FeCl 3 in anhydrous chloroform (CHCl 3 ) [14]. Scheme 1.…”

Section: Polymerization Of 3-octylthiophenementioning

confidence: 99%

Physical and Optical Properties of Poly(3-AlkylThiophene) with a View to the Fabrication of a Highly Nonlinear Waveguide~!2008-06-17~!2008-08-22~!2008-09-18~!

Messaad¹,

Bosc²,

Haesaert³

et al. 2010

TOMSJ

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Abstract:In order to take advantage of the very high nonlinear susceptibility of conjugated polymer materials, Poly(3-AlkylThiophene)s, P3AT, were synthesized in the laboratory. The physical, thermomechanical and linear optical properties of synthesized P3AT have been investigated and the first experimental attempts at creating nonlinear optical waveguides and determining their characteristics are presented. After synthesizing P3AT, the relationships between polymer chain characteristics and mechanical properties are investigated to see if the polymer is suitable for optical waveguide process technology. We also examine the optical attenuation of the synthesized material, a crucial factor in anticipating the relative opacity of the future component. For the first time we present the absorption spectrum of 3-Octylthiophene molecules in the Near Infra-Red (NIR) region that suggests optical losses for the material are about 0.6 dB.cm -1 at 1550 nm. Next we examined several waveguide structures such as ridge, buried and Strip Loaded WaveGuides (SLWG) based on P3AT material. For the buried waveguides, we have observed the signal transmission and in our opinion the low optical transmission of P3AT ridge and SLWG could be attributed to extrinsic losses (mainly scattering) due to both the remaining insoluble products in the polymer and to the poor adhesion between optical layers.

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Polymerization of 3-alkylthiophenes with FeCl3

Cited by 161 publications

References 9 publications

One Step Synthesis of Polythiophenes from the Partially Purified Crude Extract of the Roots of Tagetes Erecta

One Step Synthesis of Polythiophenes from the Partially Purified Crude Extract of the Roots of Tagetes Erecta

Structural and thermal properties of carboxylic acid functionalized polythiophenes

Physical and Optical Properties of Poly(3-AlkylThiophene) with a View to the Fabrication of a Highly Nonlinear Waveguide~!2008-06-17~!2008-08-22~!2008-09-18~!

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