Designing of Photochemical Hole Burning Materials: Burning Process in Hydrogen Bonding and Proton Transfer Molecular System

Abstract
The burning process of persistent spectral holes in quinizarin and its hydroxy derivatives is investigated from the viewpoint of hydrogen bonding and proton transfer molecular systems. Correlations among molecular structure, electronic structure and hole forming ability are substantial. A possible underlying mechanism involving diabatic crossing of the ground state is proposed and a close comparison to that in free-base porphyrin is given.