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Circularly Polarized Fluorescent Helicene-Boranils: Synthesis, Photophysical and Chiroptical Properties.

Aurélie MacéKhaoula HamrouniEtienne S GauthierMarion JeanNicolas VanthuyneLucas FrédéricGrégory PietersElsa CaytanThierry RoisnelFaouzi AlouiMonika Srebro-HooperBertrand CarboniFabienne BerréeJeanne Crassous
Published in: Chemistry (Weinheim an der Bergstrasse, Germany) (2021)
Mono- and di-boranil-substituted helicenes were prepared by BF2 -borylation of the corresponding anils, readily synthesized by condensation of 2-amino- and 2,15-diamino-helicenes with 4-(diethylamino)salicylaldehyde. After enantiomeric resolution using HPLC, their chiroptical properties including circularly polarized fluorescence in solution and in PMMA films were investigated and rationalized with the help of NMR, X-ray and quantum-chemical calculations.
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