Photoinduced Phase Transition of Hybrid Films of Azobenzene-based Photochromic Amorphous Molecular Materials and Poly(vinyl acetate)

摘要

Homogeneous hybrid films of azobenzene-based photochromic amorphous molecular materials, 4-[bis(4-methylphenyl)amino]azobenzene (BMAB) and 4-[phenyl(biphenyl-4-yl)amino]azobenzene (PBAB), together with poly(vinyl acetate) (PVAc) were obtained by spin-coating method. Both BMAB-PVAc and PBAB-PVAc films exhibited reversible phase separation-resolution phenomena by thermal treatments. When the resulting phase-separated films were irradiated with 488 nm-laser beam at appropriate temperature, phase transition was found to take place to form homogeneous films.