Thieno[3,4-d]imidazolium-containing Molecular Wire:Switching Behavior of Photoinduced Intramolecular Electron Transfer

摘要

Zinc-porphyrin-oligothiophene-fullerene triad,where di-ethynylthieno[3,4-d]imtdazolium is incorporated as a central unit of oligothiophene,has been synthesized.A dramatic enhancement of fluorescence from the zinc-porphyrin unit was observed on displacing counter anion from I~-to F~-in the imida-zolium salt,indicating that photoinduced intramolecular electron transfer is controllable by the electronic perturbation to this unit.