Figure 4. A single cycle taken from Figure 3. The dashed vertical line marks the voltage turning point at -1.5 V (90 s). The solid vertical lines mark the onsets (from left to right) of reactions 1 (colorless to blue), 2 (blue to yellow), 3 (yellow to blue), and 6 (blue to colorless). The novice might need to be alerted to the fact that the potentials at which the color changes start to happen do not correspond to the peak-current potentials in the CV. The CV peak-current potentials show at which potential the reactions are most efficient, not the ones at which they can start to occur

From

Electrochromism of Methylviologen (Paraquat)

N. Aristov, A. Habekost

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