126213-50-1Relevant articles and documents
Simple one-step synthesis of 3,4-dimethoxythiophene and its conversion into 3,4-ethylenedioxythiophene (EDOT)
Von Kieseritzky, Fredrik,Allared, Fredrik,Dahlstedt, Emma,Hellberg, Jonas
, p. 6049 - 6050 (2004)
3,4-Dimethoxythiophene (2) was synthesized in one-step from readily available bulk chemicals via a ring closure reaction, and was then trans-etherified with ethylene glycol to give 3,4-ethylenedioxythiophene (3) (EDOT).
The first direct experimental comparison between the hugely contrasting properties of PEDOT and the all-sulfur analogue PEDTT by analogy with well-defined EDTT-EDOT copolymers
Spencer, Howard J.,Skabara, Peter J.,Giles, Mark,McCulloch, Iain,Coles, Simon J.,Hursthouse, Michael B.
, p. 4783 - 4792 (2005)
The structures of poly(3,4-ethylenedioxythiophene) (PEDOT) and poly(3,4-ethylenedithiathiophene) (PEDTT) vary only in the substituent chalcogen atoms, yet the electronic properties of the materials are surprisingly dissimilar. The difference in electronic band gaps is approximately 0.8 eV and the polymers behave very differently upon p-doping. Two new terthiophenes have been synthesised using Negishi coupling methods. The X-ray crystal structures of EDOT-EDTT-EDOT (OSO) and EDTT-EDOT-EDTT (SOS) show strong intramolecular chalcogen-chalcogen contacts which are responsible for persistent conformers in solution and solid state, although significant interchain interactions should also influence the properties of the materials. SOS and OSO can be polymerised by electrochemical oxidation to give the corresponding, well-defined poly(terthiophenes) PSOS and POSO. Spectroelectrochemical studies on all four polymers reveal strong similarities between PEDTT and PSOS, and between PEDOT and POSO. Together with independent electrochemical and absorption studies, the results indicate that the unique properties of PEDOT are influenced more by conformational effects (intrachain S...O contacts) than substituent effects. The Royal Society of Chemistry 2005.
3,4-ethylenedioxythiophene and 3,4-ethylenedioxyselenophene: Synthesis and reactivity of Cα-Si bond
Das, Soumyajit,Dutta, Pradip Kumar,Panda, Snigdha,Zade, Sanjio S.
, p. 4868 - 4871 (2010)
(Figure Presented) A synthetic approach to synthesize EDOT and EDOS from a common precursor 5 is reported. The method involves zirconocene dichloride mediated reaction of a common diyne 5 followed by treatment with disulfur dichloride (S2Cl2) and in situ prepared selenium dichloride (SeCl2). The higher lability of α-trimethylsilyl group in EDOS compared to EDOT is explained using DFT calculations.
Synthesis process of 3, 4-ethylenedioxythiophene
-
Paragraph 0029-0044, (2021/01/24)
The invention discloses a synthesis process of 3, 4-ethylene dioxythiophene, which comprises the following steps: by using diethyl 2, 5-dicarboxylate-3, 4-ethylene dioxythiophene as a raw material anda dimethylformamide water solution as a solvent, heating to 110-120 DEG C in the presence of a catalyst, reacting for 2-4 hours, filtering, and carrying out vacuum distillation to obtain 3, 4-ethylene dioxythiophene, wherein the catalyst is a mixture of copper oxide and zinc oxide. Copper oxide and zinc oxide are used as catalysts, one-step degreasing is achieved, the steps are simple, the synergistic effect of copper oxide and zinc oxide can be fully achieved, the reaction temperature is reduced, the reaction time is shortened, the reaction selectivity is improved, by-products are reduced, and the yield and purity of a target product are improved.
Decarboxylation method of thieno[3,4-b]-1,4-dioxa-5,7-dicarboxylic acid
-
Paragraph 0023; 0024; 0025, (2017/02/28)
The invention discloses a decarboxylation method of thieno[3,4-b]-1,4-dioxa-5,7-dicarboxylic acid. According to the method provided by the invention, a fused salt type compound is used as a dispersant and a decarboxylation reaction is carried out at 100 DEG C to 300 DEG C; in a reaction process, a catalyst does not need to be added. The method is simple, high in product yield and low in raw material cost and is very suitable for industrial production; the adding amount of an anti-color-changing agent used in the decarboxylation method is less, an adding method is simple and the cost is low, so that the decarboxylation method is very suitable for the industrial production.