On a single graph, plot (he absorbance spectra of the three dyes. Clearly identi

Question

On a single graph, plot (he absorbance spectra of the three dyes. Clearly identify which curve corresponds to which dye and label lambdamax for each compounds. Derive equation 2,which shows the relationship between the energy of the absorbed photon Amax and the quantum states of molecules. Record the number of pi-electrons, n, for the HOMO and LUMO for the molecules and the length of the conjugated pi-system for each dye. Using your equation from question 2, determine the theoretical value of lambdamax for each dye. (Attach Calculations)

Explanation / Answer

This is a pretty common relationship

E = h*f

h = planck constant 6.626*10^-34 in SI units

f = frequency in Hz

E = energy per unit photon

And to relat ewavleenth and frequency

WL = c/f

WL = wavelenght

c = speed of light 3*10^8 m/s

Therefore

E = h*(c/WL)

E = hc/WL

Emax = hc/WLmax

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