Iron Alkynyl Helicenes: Redox-Triggered Chiroptical Tuning in the IR and Near-IR Spectral Regions and Suitable for Telecommunications Applications - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Angewandte Chemie International Edition Année : 2016

Iron Alkynyl Helicenes: Redox-Triggered Chiroptical Tuning in the IR and Near-IR Spectral Regions and Suitable for Telecommunications Applications

Goulc'Hen Loas
Loic Toupet
Olivier Cador
Frédéric Paul
Marc Vallet
Jeanne Crassous

Résumé

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.
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Dates et versions

hal-01318820 , version 1 (02-06-2016)

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Chengshuo Shen, Goulc'Hen Loas, Monika Srebro-Hooper, Nicolas Vanthuyne, Loic Toupet, et al.. Iron Alkynyl Helicenes: Redox-Triggered Chiroptical Tuning in the IR and Near-IR Spectral Regions and Suitable for Telecommunications Applications. Angewandte Chemie International Edition, 2016, 55 (28), pp.8062-8066. ⟨10.1002/anie.201601633⟩. ⟨hal-01318820⟩
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