The pKa of a given functional group may change in the electronically excited state, compared to the value in the ground state. Check Chap. 7 of Lakowicz's Principles of Fluorescence Spectroscopy.
The pKa of a given functional group may change in the electronically excited state, compared to the value in the ground state. Check Chap. 7 of Lakowicz's Principles of Fluorescence Spectroscopy.