Conformational and alignment behavior of polysilane film mixed with liquidcrystal molecule

Mixed films containing poly(dihexylsilane) (PDHS) and liquid crystal (LC) m olecule were prepared onto a rubbed poly(vinyl alcohol) film by spin-castin g. The conformational state and the alignment of the PDHS backbone were inv estigated by polarized UV-visible absorption spectroscopy. The absorption b and ascribed to the crystalline state of PDHS in the mixed film showed a re d shift from that of a pure PDHS film. The PDHS backbone in the mixed film was aligned parallel to the rubbing direction. The magnitude of the red shi ft and the alignment order of PDHS was enhanced by annealing at 60 degreesC in the mixed film with some LC molecules.