211. Near-Infrared Electrochemiluminescence in Water through Regioselective Sulfonation of Diaza [4] and [6]helicene Dyes
     Haidong Li, Romain Duwald, Simon Pascal, Silvia Voci, Céline Besnard, Johann Bosson, Laurent Bouffier, Jérôme Lacour, Neso Sojic
     Chem. Commun. 2020, 56, 9771-9774

A series of water-soluble helicene dyes generating intense electrochemiluminescence (ECL) signal in physiological conditions is reported. Those species were prepared using diaza [4] and [6]helicenes as structural cores modified with sulfonate groups in various positions. Such functional groups improve their water solubility and induce a red-shifted emission. Efficient ECL emission up to the near-infrared is achieved in water.

DOI: 10.1039/D0CC04156D 

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