Fig. 6.

Nanosecond transient absorption spectra of Ir-4. a Ir-4, b Ir-4 in the presence of 40 mM of DMT, c reduced Ir-4 in the presence of 0.2 mM of C-1, d the decay of Ir-4 at 517 nm, e kinetic traces of the reduced Ir-4 followed at 525 nm, f kinetic traces of reduced Ir-4 with different concentration of C-1 followed at 525 nm. These spectra were recorded in CH₃CN after pulsed excitation at 532 nm under N₂