C566lecture23_000

C566lecture23_000 - C566 Master Lecture Notes Lecture 23...

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C566 Master Lecture Notes Lecture 23 Vibrational Structure in Electronic Absorption Transitions- the language used ORIGIN of the electronic transition : Spectroscopic peak resulting from a transition from the zero point energy of one state to the zero point energy of the other state. Convention of labeling vibronic coarse structure: ... 3 2 1 3 3 2 2 1 1 Typically, if x and x equal zero, they are not included in the label. a progression in mode X is indicated by X 0 1 , X 0 2 , X 0 3 ,… with the origin (zero point of ground state to zero point of excited state) indicated by 0 0 0 Sequence band progressions in mode X Note that higher lying vibrational level populations governed by T via Boltzmann eqn. Spacings between sequence bands reflect the DIFFERENCE in vibrational frequencies of analogous vibrational modes in the two electronic states. x = 0 x = 0 x = 1 x = 2 x = 3 x = 4  = 0, 1, 2, 3, 4 x = 0 x = 0 x = 1 x = 2 x = 3 x 2 3 X 3 4
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C566lecture23_000 - C566 Master Lecture Notes Lecture 23...

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