Two-photon absorption investigation in reduced and oxidized cytochrome c solutions
Here we present, a two-photon absorption (2PA) study in Fe2+ and Fe3+ oxidation states of
cytochrome c molecule in water solution, using the femtosecond Z-scan technique with
pulses from 560 to 850 nm. No qualitative difference was observed in the 2PA process for
the two Fe oxidation states. The 2PA cross-sections, for both samples, increase as the
wavelength approaches the absorption band, in agreement with the resonant denominator
in the sum-over states model, presenting a maximum value of approximately 1000 GM at …
cytochrome c molecule in water solution, using the femtosecond Z-scan technique with
pulses from 560 to 850 nm. No qualitative difference was observed in the 2PA process for
the two Fe oxidation states. The 2PA cross-sections, for both samples, increase as the
wavelength approaches the absorption band, in agreement with the resonant denominator
in the sum-over states model, presenting a maximum value of approximately 1000 GM at …