Dedicated to Professor Klaus Müllen
Abstract
Attachment of cyclic imide groups to polycyclic aromatic hydrocarbons (PAHs) leads
to fascinating electronic and luminescence properties, with rylene diimides being
a representative example. The close to unity fluorescence quantum yields and electron-acceptor
properties render them suitable for application in organic electronics and photovoltaics.
Recent reports show that, in line with planar PAHs, the imide functionalization has
also endowed helical three-dimensional PAHs with similar beneficial photophysical
properties. In this article, we have summarized the state-of-the-art research developments
in the field of helicene–imide hybrid functional molecules, with a particular focus
on synthesis, (chir)optical and redox properties, and applications in electronics.
Additionally, we have highlighted our recent work, introducing a novel family of functional
chiral molecules, namely, [n]helicene diimides, as three-dimensional relatives of rylene diimides.
Key words
chirality - helicenes - [
n]helicene diimides - rylene diimides - polycyclic aromatic hydrocarbons - functional
organic materials