Mono- and Dianion of a Bis(benzobuta)tetraazapentacene Derivative.
Lei JiSebastian HahnPhillip BieggerHilmar ReissJie HanAlexandra FriedrichIvo KrummenacherHolger BraunschweigMichael MoosJan FreudenbergChristoph LambertAndreas DreuwTodd B MarderUwe H F BunzPublished in: Chemistry (Weinheim an der Bergstrasse, Germany) (2019)
A bis(benzobuta)tetraazapentacene derivative was reduced to its radical anion and its dianion, using potassium [18]crown-6 anthracenide in THF. Both reduced species were characterized by UV/Vis spectroscopy of the isolated species and by spectroelectrochemistry. Two distinct single-crystal structures of the dianion and an EPR spectrum of the radical anion were obtained. Contrary to other azaacenes, the lowest energy absorption in the UV/Vis spectrum of the dianion is redshifted in comparison to that of the neutral compound.