title: Large-Scale Synthesis of Helicene-Like Molecules for the Design of Enantiopure Thin Films with Strong Chiroptical Activity.
abstract: Helicenes are fascinating molecules owing to their unusual properties and applications in many fields from catalysis to organic electronics. Herein, we report a straightforward pathway for the synthesis of helicene-like molecules on a gram scale in an enantiopure form. Thin-film materials with good propagating optical properties and very high chiroptical responses have been grown by using pulsed laser ablation without altering the structure or the enantiopurity of the molecules. Moreover, electronic and vibrational circular dichroism spectroscopies coupled with theoretical calculations enabled some dependences of the chiroptical properties with the structure to be highlighted, for example, effects of rigidification, aromatization, or the state of matter (liquid versus solid).
authors.affiliation: Institut Lumière Matière, Université Lyon 1 CNRS UMR5306, Villeurbanne, 69622, France.
authors.forename: Amina
authors.initials: A
authors.lastname: Bensalah-Ledoux
authors.affiliation: Laboratoire de Chimie, Université de Lyon, CNRS, Ecole Normale Supérieure de Lyon, UMR 5182, 46, Allée d'Italie, 69364, Lyon cedex 07, France.
authors.forename: Delphine
authors.initials: D
authors.lastname: Pitrat
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 Campus de Beaulieu, CNRS-Université de Rennes, 135042, Rennes Cedex, France.
authors.forename: Thibault
authors.initials: T
authors.lastname: Reynaldo
authors.affiliation: Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, R. Ingardena 3, 30-060, Krakow, Poland. srebro@chemia.uj.edu.pl.
authors.forename: Monika
authors.identifier: http://orcid.org/0000-0003-4211-325X
authors.initials: M
authors.lastname: Srebro-Hooper
authors.affiliation: Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, 14260-3000, USA.
authors.forename: Barry
authors.identifier: http://orcid.org/0000-0001-6397-7570
authors.initials: B
authors.lastname: Moore
authors.affiliation: Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, 14260-3000, USA.
authors.forename: Jochen
authors.initials: J
authors.lastname: Autschbach
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 Campus de Beaulieu, CNRS-Université de Rennes, 135042, Rennes Cedex, France. jeanne.crassous@univ-rennes1.fr.
authors.forename: Jeanne
authors.identifier: http://orcid.org/0000-0002-4037-6067
authors.initials: J
authors.lastname: Crassous
authors.affiliation: Institut Lumière Matière, Université Lyon 1 CNRS UMR5306, Villeurbanne, 69622, France.
authors.forename: Stéphan
authors.initials: S
authors.lastname: Guy
authors.affiliation: Laboratoire de Chimie, Université de Lyon, CNRS, Ecole Normale Supérieure de Lyon, UMR 5182, 46, Allée d'Italie, 69364, Lyon cedex 07, France. laure.guy@ens-lyon.fr.
authors.forename: Laure
authors.identifier: http://orcid.org/0000-0002-8728-7213
authors.initials: L
authors.lastname: Guy
keywords: chiroptical properties; circular dichroism; dibenzo[c]acridine derivatives; helicenes; thin films