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- Title
Undecabenzo[7]superhelicene: A Helical Nanographene Ribbon as a Circularly Polarized Luminescence Emitter.
- Authors
Cruz, Carlos M.; Castro‐Fernández, Silvia; Maçôas, Ermelinda; Cuerva, Juan M.; Campaña, Araceli G.
- Abstract
The synthesis and characterization of an enantiopure superhelicene nanographene is reported in which two saddle‐shaped and one planar hexabenzocoronene (HBC) units are arranged in a helicoidal shape to form an undecabenzo[7]carbohelicene. The described compound is the first fully π‐extended [7]helicene. Racemic resolution of the helical nanographene permitted analysis of the chiroptical properties and revealed dissymmetry factors in the range of 2×10−3 both in the absorption and in the emission measurements. Remarkably, non‐linear photophysical analysis demonstrated a two‐photon absorption cross‐section of 870 GM at 800 nm and a perfect overlap between linear, non‐linear, and chiral emissions.
- Subjects
HELICENES; GRAPHENE; LUMINESCENCE; HEXABENZOCORONENES; ABSORPTION
- Publication
Angewandte Chemie, 2018, Vol 130, Issue 45, p14998
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201808178