Figure 3
From: Role of Hydrogen Bonding in Green Fluorescent Protein-like Chromophore Emission
Optical properties of the cationic protonated modified chromophore and that with water molecule. Molecular configurations of the monocationic protonated modified structure in the (a) absence and (b) presence of water molecule, added protons are highlighted in blue. (c) The computed electronic energy levels and photo-emission transitions of these two excited-state structures and the original modified chromophore. The calculated transitions between frontier orbitals for the photo-emission peak of the protonated cation in the (d) absence and (e) presence of a water molecule.
