Undecabenzo[7]superhelicene: A Helical Nanographene Ribbon as a Circularly Polarized Luminescence Emitter | Zendy

Cruz Carlos M. | Zendy; CastroFernández Silvia | Zendy; Maçôas Ermelinda | Zendy; Cuerva Juan M. | Zendy; Campaña Araceli G. | Zendy

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Undecabenzo[7]superhelicene: A Helical Nanographene Ribbon as a Circularly Polarized Luminescence Emitter

Author(s) -

Cruz Carlos M.,

CastroFernández Silvia,

Maçôas Ermelinda,

Cuerva Juan M.,

Campaña Araceli G.

Publication year - 2018

Publication title -

angewandte chemie

Language(s) - English

Resource type - Journals

eISSN - 1521-3757

pISSN - 0044-8249

DOI - 10.1002/ange.201808178

Subject(s) - helicene , enantiopure drug , ribbon , luminescence , materials science , absorption (acoustics) , planar , crystallography , molecular physics , optoelectronics , chemistry , molecule , organic chemistry , composite material , computer graphics (images) , computer science , enantioselective synthesis , catalysis

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.

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