Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 24, Issue 54, Pages 14484-14494Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201802763
Keywords
charge transfer; chiroptical activity; helicenes; tetracyanobutadiene; two-photon absorption
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Funding
- Ministere de l'Education Nationale, de la Recherche et de la Technologie
- Centre National de la Recherche Scientifique (CNRS)
- University of Rennes 1
- Ecole Nationale Superieure de Chimie de Rennes
- Ministry of Science and Higher Education in Poland
- National Science Foundation [CHE-1560881]
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Enantiopure P- and M-carbo[6]helicenes substituted with one or two tetracyanobutadiene moieties at positions 2 and 15 have been prepared. Grafting of these electron-accepting groups onto the pi-helical core resulted in strong charge-transfer effects, which greatly affected the UV/Vis, electronic circular dichroism (ECD), and two-photon absorption (TPA) responses. The ECD signal was found to be reversibly switched by applying a redox stimulus.
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