title: Iron Alkynyl Helicenes: Redox-Triggered Chiroptical Tuning in the IR and Near-IR Spectral Regions and Suitable for Telecommunications Applications.
abstract: The combination of a bis-alkynyl-helicene moiety with two iron centers leads to novel electroactive species displaying unprecedented redox-triggered chiroptical switching. Upon oxidation, strong changes of vibrational modes (either local or extended coupled modes) are detected by vibrational circular dichroism and Raman optical activity. Remarkably, the sign of the optical rotation at 1.54 µm (that is, at wavelengths typically used for telecommunications) changes upon oxidation while the topology and stereochemistry of the helicene remain unchanged.
authors.affiliation: Institut des Sciences Chimiques de Rennes UMR 6226, Institut de Physique de Rennes, UMR 6251, CNRS Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France.
authors.forename: Chengshuo
authors.initials: C
authors.lastname: Shen
authors.affiliation: Institut des Sciences Chimiques de Rennes UMR 6226, Institut de Physique de Rennes, UMR 6251, CNRS Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France.
authors.forename: Goulc'hen
authors.initials: G
authors.lastname: Loas
authors.affiliation: Faculty of Chemistry, Jagiellonian University, R. Ingardena 3, 30-060, Krakow, Poland.
authors.forename: Monika
authors.identifier: 0000-0003-4211-325X
authors.initials: M
authors.lastname: Srebro-Hooper
authors.affiliation: Aix Marseille Université, Centrale Marseille, CNRS, iSm2 UMR 7313, 13397, Marseille, France.
authors.forename: Nicolas
authors.identifier: 0000-0003-2598-7940
authors.initials: N
authors.lastname: Vanthuyne
authors.affiliation: Institut des Sciences Chimiques de Rennes UMR 6226, Institut de Physique de Rennes, UMR 6251, CNRS Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France.
authors.forename: Loïc
authors.initials: L
authors.lastname: Toupet
authors.affiliation: Institut des Sciences Chimiques de Rennes UMR 6226, Institut de Physique de Rennes, UMR 6251, CNRS Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France.
authors.forename: Olivier
authors.initials: O
authors.lastname: Cador
authors.affiliation: Institut des Sciences Chimiques de Rennes UMR 6226, Institut de Physique de Rennes, UMR 6251, CNRS Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Paul
authors.affiliation: Department of Physical Chemistry, University of Malaga, Campus de Teatinos s/n, Malaga, 29071, Spain.
authors.forename: Juan T
authors.initials: JT
authors.lastname: López Navarrete
authors.affiliation: Department of Physical Chemistry, University of Malaga, Campus de Teatinos s/n, Malaga, 29071, Spain.
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Ramírez
authors.affiliation: Department of Physical Chemistry, University of Malaga, Campus de Teatinos s/n, Malaga, 29071, Spain.
authors.forename: Belén
authors.identifier: 0000-0002-1834-3664
authors.initials: B
authors.lastname: Nieto-Ortega
authors.affiliation: Department of Physical Chemistry, University of Malaga, Campus de Teatinos s/n, Malaga, 29071, Spain.
authors.forename: Juan
authors.initials: J
authors.lastname: Casado
authors.affiliation: Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY, 14260, USA. jochena@buffalo.edu.
authors.forename: Jochen
authors.initials: J
authors.lastname: Autschbach
authors.affiliation: Institut des Sciences Chimiques de Rennes UMR 6226, Institut de Physique de Rennes, UMR 6251, CNRS Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France.
authors.forename: Marc
authors.initials: M
authors.lastname: Vallet
authors.affiliation: Institut des Sciences Chimiques de Rennes UMR 6226, Institut de Physique de Rennes, UMR 6251, CNRS Université de Rennes 1, Campus de Beaulieu, 35042, Rennes Cedex, France. jeanne.crassous@univ-rennes1.fr.
authors.forename: Jeanne
authors.identifier: 0000-0002-4037-6067
authors.initials: J
authors.lastname: Crassous
keywords: Raman optical activity; circular dichroism; helicenes; iron; optical rotation