Photomodulation amperometry

Fig. 14 Light-triggered electron transfer, monitored by photomodulated amperometry.

Photomodulation amperometry of the DHAs (21-24)a is shown in Figure 20. Because of the increased acceptor strength in 22b, the 2,4-dinitrophenyl derivative 22a exhibits oscillating behavior at an electrode potential less negative than that required for the constitutional isomer 21a (Figure 20 21a, 22a). On the other hand, the 4-cyanophenyl derivative 23a displays increased sensitivity, which seems to be the result of the higher quantum yield of the photoreaction from 23a to 23b (Figure... 

---