Electrochemistry of an open-cage fullerene embedded in a film of hydrophobic ammonium ion on an electrode

Kenichi Watanabe, Masaharu Komatsu, Yasuro Niidome, Michihisa Murata, Yasujiro Murata, Koichi Komatsu, Naotoshi Nakashima

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Abstract

Functional electrode devices modified with only the cast films of an open-cage fullerene (compound 1) and of 1/long-chain tetraalkylammonium ion were constructed and the aqueous electrochemistry of the electrodes was investigated. Tetraoctylammonium bromide (TOAB) was used as a long-chain ammonium ion. Almost no electrochemistry was observed for the 1 film-coated electrode. In sharp contrast, the 1/TOAB-coated electrode was found to exhibit well-defined cyclic voltammograms (CVs), leading to the generation of the radical monoanion and dianion of 1 at E10′ = -0.120 and E20′ = -0.594 V (E vs SCE), respectively. The generation of the trianion of 1 at the electrode was not evident. The radical monoanion of 1 was unstable for potential cycling at scan rates of 0.1-1 V/s, whereas the dianion was stable at the scan rate of 1.0 V/s. We also examined the electrolyte dependence. Almost no electrolyte cation dependence was observed on the CVs of the 1/TOAB-coated electrode. On the contrary, electrolyte anions were found to influence the CVs of the electrodes. On the basis of these results, a possible electron-transfer mechanism for the first and second reduction processes of the open-cage fullerene embedded in films on the electrodes is proposed.

Original languageEnglish
Pages (from-to)6500-6504
Number of pages5
JournalJournal of Physical Chemistry C
Volume111
Issue number17
DOIs
Publication statusPublished - May 3 2007

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Watanabe, K., Komatsu, M., Niidome, Y., Murata, M., Murata, Y., Komatsu, K., & Nakashima, N. (2007). Electrochemistry of an open-cage fullerene embedded in a film of hydrophobic ammonium ion on an electrode. Journal of Physical Chemistry C, 111(17), 6500-6504. https://doi.org/10.1021/jp070459g