Dynamic and collective electrochemical responses of tetrathiafulvalene derivative self-assembled monolayers

Yasuyuki Yokota, Akira Miyazaki, Ken Ichi Fukui, Toshiaki Enoki, Kaoru Tamada, Masahiko Hara

研究成果: Contribution to journalArticle査読

31 被引用数 (Scopus)

抄録

Electroactive tetrathiafulvalene (TTF)-containing alkanethiol self-assembled monolayers (SAMs) were designed and synthesized to elucidate the relationship between electrochemical responses and film structures. Two TTF derivative molecules having one alkanethiol chain (1) and two alkanethiol chains (2) were utilized to modulate the molecular packing arrangements in the SAMs, and the formation and structure of the SAMs were characterized by surface plasmon resonance spectroscopy (SPR). SPR measurements in various contacting media demonstrated loose packing of SAM 1 and close packing of SAM 2 due to the different space fillings of the molecules. Two successive one-electron redox waves were observed for both SAMs by cyclic voltammetry. The peak widths of the redox waves were strongly dependent on the oxidation states of the TTF moieties, the packing arrangement of the SAMs, and the contacting medium. We found that TTF-based SAMs exhibited collective electrochemical responses induced by dynamic structural changes, depending on the degree of freedom for the component molecules in the SAMs. These results imply that the molecular design, taking into account the electrochemical responses, extends the available range of molecular-based functionalities in TTF-based SAMs.

本文言語英語
ページ(範囲)20401-20408
ページ数8
ジャーナルJournal of Physical Chemistry B
110
41
DOI
出版ステータス出版済み - 10 19 2006
外部発表はい

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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