Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 28, Pages 8062-8066Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201601633
Keywords
circular dichroism; helicenes; iron; optical rotation; Raman optical activity
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Funding
- ANR [12-BS07-0004-METALHEL-01]
- French Ministry of Research
- CNRS (DIL CARIM)
- EU
- Ministry of Science and Higher Education in Poland
- NSF [CHE-1265833]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1265833] Funding Source: National Science Foundation
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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 mm (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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