Abstract:Photoinduced
organic radicals are important for
chemical and physical processes of organic materials, which are extensively
investigated and applied in organic synthesis, photoelectronic devices, and biotechnology.
However, there are rare reports of the luminescence for these photoinduced
radicals, especially in the condensed state. Herein, an unexpected and
interesting luminescent radical is described, which can be rapidly and
reversibly generated from a simple organic crystal by gentle light irradiation
in air. It was revealed that the twist and asymmetric conformation of isolated
molecule in its crystal with only weak C-H···π
intermolecular interactions, which led to the generation of such photoinduced
luminescent radicals. In addition, dual-channel photosensitive device with rapid response and
well repeatability can be obtained based on the thin film of this organic
crystal, showing both photoswitching on luminescence and conducting.
