is the number of electrons with spin 𝜎 on atom 𝑖, and 𝑛 -= ∑ 𝑛 -2 2 is the total number of electrons on the atom. We retain electronic hoppings 𝑡 -. only between nearest neighbors i and j. U is the Coulomb repulsion between two electrons occupying the 𝑝 7 orbital of the same C-atom, and 𝑉 -. is long-range Coulomb interaction. The average bond lengths within an acene unit are different for the peripheral (1.40 Å) and internal (1.46 Å) bonds. Based on a widely used bond length-hopping integral relationships, we have chosen intra-acene peripheral (internal) hopping integrals 𝑡 -. as 2.4 (2.2) eV. We have chosen planar geometries for both and therefore interunit hopping integrals 2.2 eV between the SFC monomers and the bridge molecules, although this can be relaxed . We use the screened Ohno parameterization for the long-range Coulomb repulsion, 𝑉 -. = 𝑈/𝜅F1 + 0.6117𝑅 -.