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| - In Situ Spectroelectrochemistry and Electrochemical Quartz Crystal Microbalance (EQCM)Characterization of C60 Embedded in a Tetraoctylammonium Bromide Film in AqueousSolution
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| - The electrochemical behavior of C60 embedded in tetraoctylammonium bromide (TOAB) films deposited onglassy carbon, quartz crystal microbalance (QCM) gold crystals, and indium tin oxide (ITO) electrodes wasinvestigated in detail. Three reversible redox peaks were observed in aqueous solution. The first reductionpeak for a C60−TOAB film in aqueous solution was found to be much more positive (500 mV shift) than thatreported for C60 in nonaqueous solution. In situ Vis/NIR spectra were recorded to monitor the electrochemicalprocesses of C60−TOAB on the electrode surfaces. The results provide the first direct evidence for the generationof discrete monoanions and dianions of C60 in the TOAB film in aqueous solution. The electrode processeswere also monitored using electrochemical quartz crystal microbalance (EQCM) in different supportingelectrolytes. Pronounced anionic effects due to diffusion into or out from the C60−TOAB films were alsoobserved for first time.
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