(d) The figure below shows the fluorescence intensity recorded for four porphyrin molecules (1-4),which each undergo single exponential decay.Fluorescence Decay1.00.50.001020Time (ns)30123A 4O40(i) Using the data above and indicating the appropriate equations, estimate the lifetime offluorescence for each porphyrin and calculate the rate constant in each case.(ii) Porphyrin fluorescence is quenched by molecular oxygen. If the diffusion coefficient (D) ofO₂ in water at 25 °C is 2.5 x 10-5 cm² s1 estimate the distance travelled by an oxygenmolecule during the lifetime of molecules 1 and 4 and comment on the relative likelihood ofquenching.

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Answered: (d) The figure below shows the…

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