New [4]helicene derivatives Synthesis, characterization and photophysical properties

N. Hafedh (1) , F. Aloui (1) , S. Raouafi (1) , V. Dorcet (2) , B.B. Hassine (1)

1 UM - Université de Monastir - University of Monastir
2 ISCR - Institut des Sciences Chimiques de Rennes

The design and synthesis of new [4]helicene derivatives were carried out by incorporating well-defined electron donor and acceptor groups at selected positions of the aromatic nuclei, aiming to use them in optical applications. Helicenes have been obtained in good overall yields through a five-step sequence involving mild experimental conditions and easy purification. Photophysical properties of these tetracyclic systems have been evaluated by UV–visible absorption and fluorescence spectroscopies and an emission in the visible region was observed.

Keywords: Cyclization; Helicenes; Optical properties; Photolysis; Photooxidation

Domains: Chemical Sciences; Chemical Sciences; Organic chemistry

N. Hafedh, F. Aloui, S. Raouafi, V. Dorcet, B.B. Hassine. New [4]helicene derivatives Synthesis, characterization and photophysical properties. Journal of Molecular Liquids, 2018, 262, pp.310-316. ⟨10.1016/j.molliq.2018.04.083⟩. ⟨hal-01809160⟩