The investigation of ESPT for 2,8-diphenyl-3,7-dihydroxy-4H,6H-pyrano[3,2-g]-chromene-4,6-dione: single or double?

Abstract

The dynamic overall perspective of an excited-state proton transfer (ESPT) process for 2,8-diphenyl-3,7-dihydroxy-4<italic>H</italic>,6<italic>H</italic>-pyrano[3,2-<italic>g</italic>]-chromene-4,6-dione (D3HF) is investigated based on a time-dependent density functional theory (TDDFT) method.