New cyclopenta-fused polycyclic aromatic hydrocarbons (CP-PAHs) based on tetracene
have been prepared by a palladium-catalyzed cyclopentannulation reaction. The new
compounds have low-energy lowest unoccupied molecular orbitals (LUMOs) and relatively
small band gaps. The photooxidative stability was intermediate to previously prepared
CP-PAHs based on anthracene and pentacene as found in traditional acene stabilities.
Scholl cyclodehydrogenation of pendant aryl groups led to materials that quickly formed
endoperoxide products.
Key words
cyclopenta-fused polycyclic aromatic hydrocarbons - electron acceptors - acenes -
palladium-catalyzed annulation