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

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...

Full description

Saved in:
Bibliographic Details
Published in:Journal of molecular liquids 2018-07, Vol.262, p.310-316
Main Authors: Hafedh, Nesrine, Aloui, Faouzi, Raouafi, Sondes, Dorcet, Vincent, Hassine, Béchir Ben
Format: Article
Language:English
Subjects:
Chemical Sciences
Cyclization
Helicenes
Optical properties
Organic chemistry
Photolysis
Photooxidation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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. [Display omitted] •Facile method was developed for [4]helicenes preparation from 2-naphthaldehyde.•Photophysical properties of [4]helicenes were studied in solutions.•Optical gap values of [4]helicenes were found to be less than 3.2 eV.
ISSN:0167-7322
1873-3166
DOI:10.1016/j.molliq.2018.04.083