
Problem 5 (6 pts): Sketch an electronic absorption/emission spectra where the maximum absorption occurs at 2.1...
Use the absorption and fluorescence spectra of bacteriochlorophyll a dissolved in toluene to estimate: (a) the Stokes shift of the fluorescence spectrum (b) the frequency (in cm−1) of the vibrational mode that is displaced (stretched) by the optical transition from the ground state to the excited state. Compare the estimates you get from the vibrational structure of the absorption and fluorescence spectra. What part of the bacteriochlorophyll macrocycle is likely to be changing structure?Explain. (c) the energy gaps in cm−1...
In the ro-vibrational model for spectra of diatomic molecules, the total rotational and vibrational energy for a given state is: Évj = ū(v + 3) + BJC +1) (Equation 1) where v is the vibrational quantum number and J is the rotational quantum number. Complete the following steps to create a model energy level diagram for a hypothetical diatomic molecule with ✓ = 2000 cm-1 and B = 1 cm-1. i) Draw a horizontal line to represent the ground vibrational...