Water Soluble, Self-Doping EDOT Derivatives

4 Water Soluble, Self-Doping EDOT Derivatives 

UV-Vis spectra of (a) PEDOT-SLi and(b) PEDOT-S de-doped (—) and oxidized (-) films. (From 

The electropolymerization of 1 1 mixtures (mol/mol) of EDOT and EDOT-S is performed with less experimental challenges due to the lower solubility and fouling tendency of the deposited films, compared to those of the PEDOT-S homopolymer. ° Moreover, the 1 1 copolymer has been reported as a cation exchange material by Chevrot s groups. The anodic polymerization of the EDOT-EDOT-S mixture yielded polymer films having permanent cation-exchange properties. The authors confirmed the ability to extract cations with the examples of hexammine ruthenium(III) [Ru(NH3)g i and uranyl (U02 +) cations.  

A detailed investigation of PEDOT-S has been performed by Reynolds and coworkers. PEDOT-S— both chemically and electrochemically prepared— was characterized and studied regarding its electrochromic and its hole trans-portproperties. The electrochromic contrast was found tobelowerthaninmany other electrochromic polymers, but rapid switching could be performed. 

Synthesis and characterization of electrically conducting copolymers of ethylenedioxythiophene and 1,3-propylenedioxythiophene with co-fimctional substituents. Mater Set Lett 16 809-811. 

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Water Soluble, "Self-Doping" EDOT Derivatives... 

The carboxylic acid moiety is not sufficient to give— after neutralization— water soluble, so-called self-doping PEDOT derivatives. Copolymers of EDOT-CH2O-CH2-COOH (the carboxylic acid in Figure 12.6) with EDOT and... 

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