Unexpected interaction between PEDOT and phosphonium ionic liquids

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

*この研究の対応する著者

研究成果: Article査読

29 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)11309-11313
ページ数5
ジャーナルJournal of the American Chemical Society
135
30
DOI
出版ステータスPublished - 2013 7月 31
外部発表はい

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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