Calculation of spectral shifts in UV-visible region and photo stability of thermotropic liquid crystals: Solvent and alkyl chain length effects

► The strongest band of nOCAC molecules can be assigned as π → π* transitions. ► Red-shift of nOCAC molecules indicates a weak exciton coupling of chromophores. ► No n → π* transition occurs due to the rigidity of the ring system of the molecules. ► The HOMO, LUMO, and Eg values have been found to be independent of solvent effect.