Synthesis and photophysical properties of expanded dehydrobenzoannulenoannulene trefoils.
A sequential Sonogashira cross-coupling/Pd-mediated oxidative homocoupling strategy affords two-dimensional dehydrobenzoannulene trefoils containing different sizes of the central annulenic ring system. Use of these conditions instead of Cu-mediated homocoupling conditions yields a structural isomer possessing a triphenylene ([6]annulene) core. Noticeable differences in the absorption and emission spectra are observed depending upon the core unit.
Takeda
Takashi
T
Department of Chemistry and Materials Science Institute, University of Oregon, Eugene, Oregon 97403-1253, USA.
Fix
Aaron G
AG
Haley
Michael M
MM