Ferrocene oxidation wave

These results show that significant anodic shifts in the ferrocene oxidation wave result if cations are added to the conjugated receptor systems where the 7r-electron system links the heteroatoms of the ionophore to the redox centre. 

Table 1 The electrochemical anodic shifts of the ferrocene oxidation wave of [2a], [2b], [3], [4a] and [4b] upon addition of 4 equiv of cation.

In conclusion, with these types of ligand systems anodic perturbations of the ferrocene oxidation wave are observed if a conjugated 77-electron system (—C=C—, —CH=N—) links the heteroatoms of the crown ionophore to the redox center, and the polarizing power of the guest metal cation is of great importance in determining the magnitude... 

The cyclic voltammograms of these complexes contain a reversible ferrocene oxidation wave, followed by an irreversible oligothiophene-based wave. The potential of this oligothiophene-based wave varies, depending on the length... 

They are used as voltammetric solvent alone or by mixing with C02. Usually they have wide potential windows. Olsen and Tallman [26] measured in supercritical chlorodifluoromethane the oxidation wave of ferrocene (Fc° -> Fc+) and the reduction wave of cobaltocenium ion (Cc+->Cc°). The difference between their halfwave potentials was 1.28 V, in good agreement with 1.31 V obtained in various non-aqueous solutions (Section 8.2.2). Recently, Abbott and Eardley [27] studied the reduction of C02 in a mixed SCF (C02/HFC-134a, %HFc-i34a = 0.3) using Pt and Pb electrodes. At 60 °C and 260 bar, the faradaic efficiencies (%) of (COOH)2,... 

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