Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 262, Issue -, Pages 310-316Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2018.04.083
Keywords
Helicenes; Photolysis; Cyclization; Photooxidation; Optical properties
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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. (C) 2018 Elsevier B.V. All rights reserved.
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