Functional helquats: helical cationic dyes with marked, switchable chiroptical properties in the visible regionElectronic supplementary information (ESI) available: Experimental and theoretical procedures, synthesis, spectroscopic, and crystallographic data. CCDC 925828-925831, 1004339-1004345, 1004883, 1004884, 1008162. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c4cc08967g

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...

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Main Authors: Reyes-Gutiérrez, Paul E, Jirásek, Michael, Severa, Lukáš, Novotná, Pavlína, Koval, Dušan, Sázelová, Petra, Vávra, Jan, Meyer, Andreas, Císa ová, Ivana, Šaman, David, Pohl, Radek, Št pánek, Petr, Slaví ek, Petr, Coe, Benjamin J, Hájek, Miroslav, Kaši ka, Václav, Urbanová, Marie, Teplý, Filip
Format: Article
Language:English
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Summary: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. Helically chiral styryl dyes with large ECD in the visible region are introduced.
ISSN:1359-7345
1364-548X
DOI:10.1039/c4cc08967g