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Iron Alkynyl Helicenes: Redox‐Triggered Chiroptical Tuning in the IR and Near‐IR Spectral Regions and Suitable for Telecommunications Applications
Author(s) -
Shen Chengshuo,
Loas Goulc'hen,
SrebroHooper Monika,
Vanthuyne Nicolas,
Toupet Loïc,
Cador Olivier,
Paul Frédéric,
López Navarrete Juan T.,
Ramírez Francisco J.,
NietoOrtega Belén,
Casado Juan,
Autschbach Jochen,
Vallet Marc,
Crassous Jeanne
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201601633
Subject(s) - helicene , moiety , circular dichroism , redox , chemistry , raman spectroscopy , vibrational circular dichroism , photochemistry , optical rotation , wavelength , topology (electrical circuits) , crystallography , stereochemistry , materials science , optoelectronics , molecule , physics , optics , inorganic chemistry , organic chemistry , mathematics , combinatorics
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.