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

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

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)20401-20408
Number of pages8
JournalJournal of Physical Chemistry B
Volume110
Issue number41
DOIs
Publication statusPublished - Oct 19 2006

Fingerprint

Self assembled monolayers
Derivatives
Oxidation-Reduction
Spectrum Analysis
molecules
dynamic structural analysis
surface plasmon resonance
Surface Plasmon Resonance
spectroscopy
degrees of freedom
Molecules
oxidation
tetrathiafulvalene
Spectroscopy
Electrons
Structural dynamics
Degrees of freedom (mechanics)
Surface plasmon resonance
electrons
Cyclic voltammetry

All Science Journal Classification (ASJC) codes

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

Cite this

Dynamic and collective electrochemical responses of tetrathiafulvalene derivative self-assembled monolayers. / Yokota, Yasuyuki; Miyazaki, Akira; Fukui, Ken Ichi; Enoki, Toshiaki; Tamada, Kaoru; Hara, Masahiko.

In: Journal of Physical Chemistry B, Vol. 110, No. 41, 19.10.2006, p. 20401-20408.

Research output: Contribution to journalArticle

Yokota, Yasuyuki ; Miyazaki, Akira ; Fukui, Ken Ichi ; Enoki, Toshiaki ; Tamada, Kaoru ; Hara, Masahiko. / Dynamic and collective electrochemical responses of tetrathiafulvalene derivative self-assembled monolayers. In: Journal of Physical Chemistry B. 2006 ; Vol. 110, No. 41. pp. 20401-20408.
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