Electronic Structures and Properties of Twisted Polyacenes

Abstract
The effects of twisting on the electronic structures and properties of polyacenes were studied computationally using DFT methods. Singlet−triplet and HOMO−LUMO gaps and vertical S0−S1 transition energies are marginally affected as a function of end-to-end twist angle. The large twist induced by the phenyl substituents in 9,10,11,20,21,22-hexaphenyltetrabenzo[a,c,l,n]pentacene has little influence on its electronic structure.