N‐Doped Octagon‐Containing HBC as Redox and pH Chiroptical Switch in the NIR

Abstract

Abstract The optical and chiroptical properties of an aza‐HBC‐oct‐[5]helicene have been studied and also modulated by means of protonation or oxidation. In both cases, the generated species shows a new absorption band in the NIR region that is not present in the neutral species. This result enables this N‐doped nanographene to act both as optical and, remarkably, as chiroptical switch since both the CD and CPL can be modulated by external stimuli such as redox or pH changes.

Keywords

• chiroptical switch
• circular dichroism
• helicenes
• hydrocarbons
• N-doped
• nanographenes