Fig. 4. Homogeneous photophysical and photocatalytic behaviors of PTC-1(2H).

a Nanosecond transient absorption spectra for a toluene solution of PTC-1(2H) excited upon 355 nm laser pulse under nitrogen condition; b normalized kinetic traces of the 450 nm band of PTC-1(2H) and H₂CBPP under nitrogen condition; c time-dependent absorption spectra of DPBF in DMF upon visible light irradiation (λ > 510 nm) in the presence of PTC-1(2H); d comparison of absorbance decay rate at 416 nm of DPBF in the presence of different catalysts. Source data are provided as a Source Data file.