Question

How to differentiate n to pi* and pi to pi* transition in fluorescence spectra?

Answer 1

Answer:

UV-Vis analysis of Tetraphenylcyclopentadienone The "n" electrons (or the nonbonding electrons) are the ones located on the oxygen of the carbonyl group of tetraphenyclopentadienone. Thus, the n to π* transition corresponds to the excitation of an electron from one of the unshared pair to the π* orbital.