Electrochemical Properties of Buckminsterfullerene (<TEX>$C_{60}$</TEX>) in Acetonitrile Containing Quarternary Ammonium Electrolytes

Kim, Il Kwang; Kim, Hyun Jin; Oh, Gi Su; Jeon, Il Chol; Ahn, Byoung Joon

P-ISSN1225-0163
E-ISSN2288-8985
SCOPUS, ESCI, KCI

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P-ISSN 1225-0163
E-ISSN 2288-8985

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Vol.8, No.4

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Electrochemical Properties of Buckminsterfullerene (<TEX>$C_{60}$</TEX>) in Acetonitrile Containing Quarternary Ammonium Electrolytes

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985

1995, v.8 no.4, pp.675-682

Kim, Il Kwang
Kim, Hyun Jin
Oh, Gi Su
Jeon, Il Chol
Ahn, Byoung Joon

Kim, I. K., Kim, H. J., Oh, G. S., Jeon, I. C., & Ahn, B. J. (1995). Electrochemical Properties of Buckminsterfullerene (<TEX>$C_{60}$</TEX>) in Acetonitrile Containing Quarternary Ammonium Electrolytes. , 8(4), 675-682.

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Abstract

Thin films of buckminsterfullerene(<TEX>$C_{60}$</TEX>) formed by solution drop casting on Pt foil electrode surfaces were studied by cyclic voltammetry(CV) in acetonitrile(MeCN) containing quaternary ammonium or alkali-metal salts as supporting electrolyte. The electrochemical behaviors of <TEX>$C_{60}$</TEX> films are found to be strongly dependent on the nature of the supporting electrolytes, especially with tetrabutyl ammonium perchlorate (TBAP, <TEX>$NBu_4ClO_4$</TEX>), and tetrabutyl ammonium tetrafluoroborate (<TEX>$TBABF_4$</TEX>, <TEX>$NBu_4BF_4$</TEX>). Reasonably stable films are formed into which electrons can be injected. The interaction of <TEX>$C_{60}$</TEX> film with the quaternary ammonium cation may produce the fulleride salts <TEX>$(TBA^+)(C{_{60}}^-)$</TEX> and <TEX>$(TBA^+)_2(C{_{60}}^{2-})$</TEX>. The bulk electroreduction with a controlled potential to generate the soluble <TEX>$C{_{60}}^{3-}$</TEX> anions(dark red-brown color) is followed by electrooxidative deposition to produce a neutral <TEX>$C_{60}$</TEX> film on the surface. The peak currents(<TEX>$I_{pc}$</TEX> and <TEX>$I_{pa}$</TEX>) of these thin film were dramatically decreased with repetitive potential scanning. These results could be explained by the adsorption-desorption phenomena and ion pairing interaction of reduced species(<TEX>$C{_{60}}^-$</TEX>, and <TEX>$C{_{60}}^{2-}$</TEX>) onto the electrode surface. The peak current changes and peak potential shifts of the thin <TEX>$C_{60}$</TEX> film in cyclic voltammograms formed from solution were observed by varying scan rates.