- Merging polyacenes and cationic helicenes: from weak to intense chiroptical properties in the far red region
Duwald, R.; Bosson, J.; Pascal, S.; Grass, S.; Zinna, F.; Besnard, C.; Di Bari, L.; Jacquemin, D.; Lacour, J.
Chem. Sci. 2020, 11, 1165-1169
A series of helical tetracenes and pentacenes was synthesized from cationic [6] and [4]helicene precursors. These colorful acenes fluoresce in the far red region. While [4]helicene-based pentacenes exhibit chiroptical properties mainly in the UV region, [6]helicene-derived tetracenes show enhanced ECD in the visible range, in addition to clear CPL responses. This difference is rationalized using first principles.
Supplementary information (PDF) / Crystal structure data (CIF)
DOI : 10.1039/C9SC05407C
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