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

Watanabe, Kenichi and Komatsu, Masaharu and Niidome, Yasuro and Murata, Michihisa and Murata, Yasujiro and Komatsu, Koichi and Nakashima, Naotoshi (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). pp. 6500-6504.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp070459g

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 E-1(0)' = -0.120 and E-2(0)' = -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.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Physical Science > Nano objects
Material Science > Nanochemistry
ID Code:2903
Deposited By:Farnush Anwar
Deposited On:13 Jan 2009 16:38
Last Modified:27 Jan 2009 12:08

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