Unexpected interaction between PEDOT and phosphonium ionic liquids

Vanessa Armel, Jonathan Rivnay, George Malliaras, Bjorn Winther Jensen*


研究成果: Article査読

29 被引用数 (Scopus)


In-situ-polymerized films of poly(3,4-ethylenedioxythiophene) (PEDOT) are known to be relatively ordered materials and maintain this order under changing chemical and electrochemical conditions. It is therefore surprising that certain ionic liquids (ILs) were found to interact with PEDOT and thereby to a large extent disrupt the ordered structure. The current work demonstrates the expansion of the interlayer distance (d100) of PEDOT and the composite of PEDOT with poly(ethyleneglycol) (PEDOT(PTS):PEG) in the presence of IL mixtures containing triisobutylmethylphosphonium tosylate (P 1444PTS) and water. In presence of the mixtures, the PEDOT(PTS):PEG film expands up to ∼100% while the PEDOT(PTS) film expanded ∼50%. The expansion did not increase the electrical resistance but increased the absorption in the π-π* range, which can be explained by increased shielding of the PEDOT chains by the IL. The incorporation of P 1444PTS increased the capacitance by 350%, compared to the theoretical capacitance of PEDOT(PTS), due to the formation of additional double-layer capacitance.

ジャーナルJournal of the American Chemical Society
出版ステータスPublished - 2013 7月 31

ASJC Scopus subject areas

  • 化学 (全般)
  • 触媒
  • 生化学
  • コロイド化学および表面化学


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