For the fluorinated species (3), also the formation of a well-ordered lattice is reported. However, Coulomb repulsion keeps the linkers at the widest possible distance (~6.3 Å) and the resulting absorption spectrum is very similar to that of the individual molecules. If large and aromatic linkers are used (as in case of PA, (2)), the attractive London dispersion interaction fosters linker rotation to the extent that the PP molecules form well-ordered stacks with intermolecular distance of ~3.3 Å, very close to that in graphite. Consequently, the band structure shows strong dispersion, which results in a red shift of the Soret band and enhances and broadens the Q bands.