Photophysics of the electronic states S 0 and S 1 for the coplanar molecular structures of the α,ω‐diphenylpolyenes DPH and DPO

Spectroscopy of the monoclinic and orthorhombic crystalline forms all-trans-diphenylhexatriene (DPH) all-trans-diphenyloctatetraene (DPO) show absorption emission bands that do not generate widely known Stokes shift polyene compounds, discovered by Hausser et al. in 1953 repeatedly studied over last 60 years. It can be concluded from our study crystallization system, whether a or does significantly influence photophysics DPH DPO crystal phase.