Ultrafast solvation dynamics of dimethyl sulfoxide induced by excited-state intramolecular proton transfers

Excited-state intramolecular proton transfers of 1,2-dihydroxyanthraquinone in dimethyl sulfoxide (DMSO) were extensively investigated by femtosecond stimulated Raman spectroscopy, where ultrafast solvation dynamics of νS=O and νCSC of DMSO between free and aggregated forms were observed.