The oxidation potential, E ox , determined from the peak of the first oxidation wave of the DPV, is 1.07 V and 1.17 The photophysical properties of 1B-DTACrs and 2B-DTACrs were firstly examined in dilute toluene solutions (10 -5 M). The photophysical data are shown in Fig. , and Table in Table . The reverse intersystem crossing rate (kRISC) of 2B-DTACrs was found to be 1.3