Figure 8. Pump-probe absorption spectroscopy of samples containing a mixture of 50% Pchlide and 50% Chlide in methanol after photoexcitation with a laser pulse centred at ∼460 nm.

The main panel show transient absorption difference spectra at delay times of 2, 16, 516 and 2980 ps after excitation. The inset shows the residuals at 675 nm for a mixture of 50% Pchlide and 50% Chlide in methanol and H₂O after subtraction of the sum of the ‘Pchlide only’ and ‘Chlide only’ data from the actual time-resolved difference spectra.