Functional helquats: Helical cationic dyes with marked, switchable chiroptical properties in the visible region

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Abstract

Helquat dyes are the first helicene-like cationic styryl dyes obtained as separate enantiomers. Their remarkable chiroptical properties are due to the unique combination of a cationic hemicyanine chromophore and a helicene-like motif. The magnitude of the ECD response and the pH switching along with their positioning in the visible region are unprecedented among helicenoids.

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Reyes-Gutiérrez, P. E., Jirásek, M., Severa, L., Novotná, P., Koval, D., Sázelová, P., … Teplý, F. (2015). Functional helquats: Helical cationic dyes with marked, switchable chiroptical properties in the visible region. Chemical Communications, 51(9), 1583–1586. https://doi.org/10.1039/c4cc08967g

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