Figure 15.
Catalytic activity of di-FeIII-DF3. Initial rate of the oxidation vs. substrate concentration for a) 4-AP, b) 3,5-DTBC, and c) PPD. The di-FeIII-DF3 concentration was 2 μm in (a) and (c), and 13 μm in (b). Kinetic parameters (kcat and Km) were determined from the Lineweaver Burk analysis (see insets). The analyzed substrates undergo a similar oxidation reaction as they bear two ortho- or para-related electron-donating groups (-OH or -NH2) in their molecular structures, giving rise to the corresponding benzoquinone monoimines, quinones, and diimines, respectively.