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Bis-4-aza[6]helicene: a bis-helicenic 2,2'-bipyridine with chemically-triggered chiroptical switching activity

Abstract : A novel enantiopure bis-helicenic 2,2'-bipyridine system was prepared using a Negishi coupling. Thanks to the bipyridine unit, the coordination with ZnII and protonation processes were studied revealing efficient tuning of photophysical (UV/Visible and emission) and chiroptical properties (electronic circular dichroism and circularly polarized emission) of the system. The coordination/decoordination and protonation/deprotonation processes appeared reversible thus constituting novel chiroptical switches.
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https://hal.archives-ouvertes.fr/hal-02094995
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Submitted on : Monday, June 24, 2019 - 10:13:48 AM
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Helena Isla, Nidal Saleh, Jiang-Kun Ou-Yang, Kais Dhbaibi, Marion Jean, et al.. Bis-4-aza[6]helicene: a bis-helicenic 2,2'-bipyridine with chemically-triggered chiroptical switching activity. Journal of Organic Chemistry, American Chemical Society, 2019, 84 (9), pp.5383-5393. ⟨10.1021/acs.joc.9b00389⟩. ⟨hal-02094995v2⟩

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