Spectroelectrochemistry indirect coulometric titration

The OTTLE method is very useful for slow electron transfer kinetics such as those of biological redox processes, in which a mediator is frequently used in an indirect coulometric titration [6, 36] and metal complexes with slow heterogeneous kinetics. An example of the latter is a copper complex in which the Cu(II/I) couple very often shows a broad quasi-reversible wave due to slow heterogeneous kinetics. In this case, spectroelectrochemistry is a useful method for obtaining accurate E° values [37]. 

Figure 7 Nernst plot for spectropotentiostatic experiment on 0.87 mM [Tc" (diars)2Cy+, 0.5 M TEAR in DMF. Data at 403 nm from Figure 6 are used. Reprinted by courtesy of Marcel-Dekker, Inc. from Heineman WR, Hawkridge FM and Blount HN (1984) Spectroelectrochemistry at optically transparent electrodes. II. Electrodes under thin-layer and semi-infinite diffusion conditions and indirect coulometric titrations. In Bard AJ (ed) Electroanaiyticai Chemistry. A Series of Advances, Vol 13, pp 1-113. New York Marcel-Dekker.

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See also in sourсe #XX -- [ , ]

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