Iron-Catalyzed Polymerization of Alkoxysulfonate-Functionalized 3,4-Ethylenedioxythiophene Gives Water-Soluble Poly(3,4-ethylenedioxythiophene) of High Conductivity
2009 (English)In: Chemistry of Materials, ISSN 0897-4756, E-ISSN 1520-5002, Vol. 21, no 9, 1815-1821 p.Article in journal (Refereed) Published
Chemical polymerization of a 3,4-ethylenedioxythiophene derivative bearing a sulfonate group (EDOTS) is reported. The polymer, PEDOT-S, is fully water-soluble and has been produced by polymerizing EDOT-S in water, using Na2S2O8 and a catalytic amount of FeCl 3. Elemental analysis and XPS measurements indicate that PEDOT-S is a material with a substantial degree of self-doping, but also contains free sulfate ions as charge-balancing counterions of the oxidized polymer. Apart from selfdoping PEDOT-S, the side chains enable full water solubility of the material; DLS studies show an average cluster size of only 2 nm. Importantly, the solvation properties of the PEDOT-S are reflected in spin-coated films, which show a surface roughness of 1.2 nm and good conductivity (12 S/cm) in ambient conditions. The electro-optical properties of this material are shown with cyclic voltammetry and spectroelectrochemical experiment reveals an electrochromic contrast (̃48% at λmax ) 606 nm).
Place, publisher, year, edition, pages
2009. Vol. 21, no 9, 1815-1821 p.
Ambient conditions, Catalytic amounts, Catalyzed polymerization, Chemical polymerization, Cluster sizes, Counterions, Electrochromic contrast, Electrooptical properties, Elemental analysis, Ethylenedioxythiophene, Functionalized, High conductivity, Self-doping, Side chains, Solvation properties, Spectroelectrochemical, Spin-coated films, Sulfate ion, Sulfonate groups, Water solubilities, XPS measurements
IdentifiersURN: urn:nbn:se:kth:diva-173678DOI: 10.1021/cm801512rISI: 000265781000012ScopusID: 2-s2.0-66149132276OAI: oai:DiVA.org:kth-173678DiVA: diva2:855184
FunderSwedish Foundation for Strategic Research
QC 201509212015-09-192015-09-162015-09-21Bibliographically approved