期刊
ANALYTICA CHIMICA ACTA
卷 697, 期 1-2, 页码 23-26出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2011.04.033
关键词
Coulometry; Spectroelectrochemistry; Number of electrons; Electrolysis
资金
- GACR [203/09/0705, P509]
- GAAV [IAA400400802]
- MSMT [COST D36 OC140]
- Institute of Chemical Technology, Prague
Measurements of UV-vis spectra as a function of the consumed charge in an optically transparent thin layer cell (OTTLE) offer a fast, small-volume and reliable method for the determination of the number of electrons n exchanged in the redox reaction. The determination of n is based on the calibration procedure using the ferrocene oxidation and the methyl viologen reduction. Virtues of this method are demonstrated on the determination of n of two oligomers of 'extended viologens' with multiple redox centers and correspondingly large n. The described method eliminates problems of side reactions of reactive intermediates with the parent oxidized form, which often impede a reliable estimation of n by the established coulometric method. (C) 2011 Elsevier B.V. All rights reserved.
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