Photoinduced intramolecular charge-transfer dynamics of a red-emitting dicyanovinyl-based triarylamine dye in solution

► Photophysics of a new push-pull red-emitting dicyanovinyl-triarylamine in solution. ► Emission arises from an intramolecular charge transfer (ICT) excited state. ► Femtosecond transient absorption reveals solvent-dependent ICT geometry and dynamics. ► Red emission is tunable and switchable by the solvent polarity.