Acridine electroreduction

Organic metals have also been used as the electrode material for the adsorption of peroxidase.The electrochemical properties of these organic metals, which are complexes of iV-methylphenazine (NMP ) or N-methyl-acridine (NMA ) with the anion radical of tetracyano-n-quinodimethane (TCNQ") with composition NMP TCNQ", NMP "(TCNQ")2, or NMA TCNQ , have been reported.Hydrogen peroxide electroreduction on the organic metals takes place in the presence of peroxidase for Er < 0.2 V (Figure 28). In the case of the enzyme adsorbed on NMP TCNQ", the reaction starts at Er> OS V. In the opinion of the authors, these data point to the presence of a direct electron exchange between the electrode and peroxidase. There are, however, certain apprehensions that, because of partial solubility, the organic metals may act as mediators. 

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