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Functionalized cationic [4]helicenes with unique tuning of absorption, fluorescence and chiroptical properties up to the far-red range

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Published in Chemical Science. 2016, vol. 7, no. 7, p. 4685-4693
Abstract Unprecedented regioselective post-functionalization of racemic and enantiopure cationic diaza [4]helicenes is afforded. The peripheral auxochrome substituents allow a general tuning of the electrochemical, photophysical and chiroptical properties of the helical dyes (26 examples). For instance, electronic absorption and circular dichroism are modulated from the orange to near-infrared spectral range (575–750 nm), fluorescence quantum efficiency is enhanced up to 0.55 (631 nm) and circularly polarized luminescence is recorded in the red (|glum| ∼ 10−3).
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Research groups Groupe Lacour
Groupe Vauthey
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HERNANDEZ DELGADO, Irene et al. Functionalized cationic [4]helicenes with unique tuning of absorption, fluorescence and chiroptical properties up to the far-red range. In: Chemical Science, 2016, vol. 7, n° 7, p. 4685-4693. https://archive-ouverte.unige.ch/unige:84734

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Deposited on : 2016-06-27

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