Hello Everyone,
I have attached two absorbance graph of two different compounds. Can anyone please tell me the reason for one peak and two peaks in an absorbance graph? and multi-peak as well?
What are the reasons of one peak and two peaks in an absorbance graph?. A.
In the first graph vibronic peak from one excited state is observed. Vibronic signals are observed for rigid organic molecule in non-interacting solvent.
In the second graph the higher energy peaks are due to transitions to higher electronic excited states.
In the first graph vibronic peak from one excited state is observed. Vibronic signals are observed for rigid organic molecule in non-interacting solvent.
In the second graph the higher energy peaks are due to transitions to higher electronic excited states.
You want to read about:
- Franck-Condon factors
- molecular electronic excitation
- vibronic coupling
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- Methodology
- Absorption Spectroscopy