Electrochemical behaviour of 3, 4-ethylenedioxythiophene functionalized by a sulphonate group. Application to the preparation of poly(3, 4-ethylenedioxythiophene) having permanent cation-exchange properties

Stéphan, Olivier; Schottland, Philippe; Gall, Pierre-Yves Le; Chevrot, C.; Mariet, Clarisse; Carrier, M.

doi:10.1016/s0022-0728(97)00548-2

Cited by 109 publications

(85 citation statements)

References 26 publications

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“…Failure to purify the monomer leads to inferior materials properties. The alcoholic precursor, 2,3-dihydrothieno[3,4-b] [1,4]dioxin-2-yl methanol (EDOT±CH 2 OH), was synthesized according to Stephan et al [37]. It should be noted that this procedure leads to a mixture of approximately 90 % six-membered (EDOT±CH 2 OH) and 10 % seven-membered ring isomers (ProDOT), as verified through gas chromatography.…”

Section: Methodsmentioning

confidence: 99%

Towards a Transparent, Highly Conductive Poly(3,4‐ethylenedioxythiophene)

Nikolov

Pollack

et al. 2004

Adv Funct Materials

269

211

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A detailed investigation of the processing parameters influencing the oxidative polymerization of 3,4‐ethylenedioxythiophene (EDOT) and a methanol‐substituted derivative (EDOT–CH2OH) was performed with the goal of maximizing the conductivity of the polymer. We show that the conductivity can be significantly enhanced by varying the monomer, oxidant (iron(III) p‐toluenesulfonate (Fe(OTs)3)), weak base (imidazole (Im)), solvent (various alcohols), and solution concentrations. The effect of each variable on the final materials properties is investigated, and the parameters have been optimized to achieve conductivities as high as 900 S cm–1. Surface resistance below 150 Ω/□ for 80–90 nm thick films with visible‐spectrum transparency exceeding 80 % is achieved. The combination of these properties makes the films highly suitable for numerous device applications.

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Section: Methodsmentioning

confidence: 99%

Towards a Transparent, Highly Conductive Poly(3,4‐ethylenedioxythiophene)

Nikolov

Pollack

et al. 2004

Adv Funct Materials

269

211

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“…Water-soluble PEDOT has been synthesized by adding an alkoxysulphonate functionality to the EDOT monomer, [50,51] resulting in the derivative poly(4-(2,3-…”

Section: Pedot-smentioning

confidence: 99%

Electronic Control of Cell Cultures Using Conjugated Polymer Surfaces

Persson¹

2014

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In the field of bioelectronics various electronic materials and devices are used in combination with biological systems in order to create novel applications within cell biology and medicine. A famous example of a successful bioelectronics application is the pacemaker. Metals are the most common electrical conductors, whereas polymers are generally considered being insulators. However, in the late 1970s it was shown that a special class of polymers with conjugated double bonds, could in fact, after some chemical modifications, conduct electricity. This was the start of the research field known as conducting polymers, and then later on organic electronics, a research area that has grown rapidly during the last decades. Conjugated polymers are also suitable to interact and interface with cells and tissues, as they are generally soft, flexible and biocompatible. In addition, their chemical properties can be tailor-made through synthesis to fit biological requirements and functions. During the last years applications using organic bioelectronics have become numerous. This thesis describes applications based on different conjugated polymers aiming to stimulate and control cell cultures. When culturing cells it is of interest to be able to control events such as adhesion, spreading, proliferation, differentiation and detachment. First, the impact of different polymer compositions and redox states on the adhesion of bacteria and subsequent biofilm formation was investigated. Similar polymer electrodes were also used to steer differentiation of neural stem cells, through changes in the surface exposure of a relevant biomolecule. Controlled delivery of molecules was achieved by coating nanoporous membranes with polymers that swell and contract when changing the redox state. Finally, electronic control over cell detachment using a water-soluble polymer was achieved. When applying a positive potential to this polymer, it swells, cracks and finally detaches, taking the cells that was cultured on top along with it. Together, the work and results presented in this thesis demonstrate a versatile conjugated polymer technology to achieve electronic control of the different growth stages of cell cultures as well as cellular functions. POPULÄRVETENSKAPLIG SAMMANFATTNINGOlika plaster finns numera överallt omkring oss och utgör ett av de absolut vanligaste materialen i vår vardag. Även elektronik har blivit en naturlig del av vår tillvaro och finns i en mängd olika produkter. Inom medicinsk teknik kommer allt fler applikationer som innefattar elektronik, ett exempel är pacemakern. Arbetet som ligger till grund för denna avhandling strävar efter att kombinera plaster och elektronik för tillämpningar inom medicin och cellbiologi.Plaster består till största delen av polymerer samt olika tillsatser för att få ett material med önskade egenskaper. Polymerer är i sin tur uppbyggda av långa kedjor av identiska molekylära byggstenar, så kallade monomerer. Monomerens kemi och struktur bestämmer även egenskaperna hos polymeren. Med hjä...

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“…16 Compound 7 was synthesized so that it could be functionalized through the hydroxy-group and used as the monomer unit in the polymer fabrication. Methanol-EDOT is a derivative of 3,4-ethylenedioxythiophene (EDOT), and as such, the polymer of this monomer is a high stability conducting polymer.…”

Section: Initial Synthesismentioning

confidence: 99%

Synthesis and Characterization of Novel Organic Conducting Polymers

Folz¹

2004

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Electrochemical behaviour of 3, 4-ethylenedioxythiophene functionalized by a sulphonate group. Application to the preparation of poly(3, 4-ethylenedioxythiophene) having permanent cation-exchange properties

Cited by 109 publications

References 26 publications

Towards a Transparent, Highly Conductive Poly(3,4‐ethylenedioxythiophene)

Towards a Transparent, Highly Conductive Poly(3,4‐ethylenedioxythiophene)

Electronic Control of Cell Cultures Using Conjugated Polymer Surfaces

Synthesis and Characterization of Novel Organic Conducting Polymers

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