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Redox and optically active carbohelicene layers prepared by potentiodynamic polymerization

Abstract : This short paper describes the preparation of thin layers based on carbohelicenes, which are inherently chiral polyaromatics existing in the enantiomeric forms P and M. Specifically, [5]-, [6]- and [7]helicene were subjected to redox cycling between −1.5 and 1.5 V vs. ferrocene/ferrocenium at a scan rate of 10 V/s. This way, enantiopure layers exhibiting redox activity were formed on the surfaces of the glassy carbon and ITO electrodes under anoxic and non-aqueous conditions. The properties of the prepared polymer layers were investigated using electrochemistry with Fe/Ru redox probes, circular dischroism, AFM, impedance measurement and Raman spectroscopy. With [6]helicene, the suggested electropolymerization procedure thus represents a proof-of-concept for the preparation of chiral carbonaceous surfaces.
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Submitted on : Thursday, June 11, 2020 - 10:08:07 AM
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J. Hrbac, V. Pavelka, J. Crassous, J. Zadny, L. Fekete, et al.. Redox and optically active carbohelicene layers prepared by potentiodynamic polymerization. Electrochemistry Communications, Elsevier, 2020, 113, pp.106689. ⟨10.1016/j.elecom.2020.106689⟩. ⟨hal-02536593⟩

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