Figure 4.

Femtosecond transient absorption data for ZnTPP‐trityl recorded in toluene solution at room temperature (top) and frozen 2‐methyltetrahydrofuran solution at 85 K (bottom) after photoexcitation at 550 nm. For a comparison of the spectral shape, a representative spectrum of the excited trityl radical is superimposed onto the ZnTPP‐trityl data (red line). The wavelength ranges dominated by artefacts from either excitation light scattering or optical saturation were cut out from the spectra recorded at 85 K. In the room temperature data, the ground state bleach extending to ΔA=0.22 has been truncated for a better comparability of the relative spectral signals.