Unprecedented induced axial chirality in a molecular BODIPY dye: strongly bisignated electronic circular dichroism in the visible region

Enantiomeric bis(BODIPYs) 1a and 1b exhibit strong bisignated ECD due to the formation of a stable helical conformation with induced axial chirality, which allows efficient exciton coupling of the BODIPY chromophores in the Vis region.