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

Abstract

Homogeneous hybrid films of azobenzene-based photochromic amorphous molecular materials, 4-[bis(4-methylphenyl)amino]azobenzene (BMAB) and 4-[phenyl(biphenyl-4yl)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 phaseseparated films were irradiated with 488 nm-laser beam at appropriate temperature, phase transition was found to take place to form homogeneous films.

Innovative Application of Nano-Organic Photochromic New Materials in Hakka Traditional Decorative Pattern Design

“…Nakano H produces photochromic molecular materials by spin coating. He found that the photochromic amorphous molecular material film based on azobenzene showed reversible phase separation resolution through heat treatment [4]. Sergey studied the preparation of highpurity composites and nano materials with photoactive compounds, and summarized the physical properties of organic photochromic ions [5], indicating that nano organic photochromic new materials are also in the research scope of researchers.…”

Emission Properties of Hybrid Films of Benzylideneaniline-based Amorphous Molecular Materials with Organic Acids

“…For example, we have reported that spincoated films of diarylaminobenzaldehyde-based emitting amorphous molecular materials exhibited vapochromic emission [11]. In addition to such materials with single component systems, we have recently been studying the creation of hybrid systems of amorphous molecular materials with other materials exhibiting smart functions [13][14][15][16][17][18][19][20][21][22][23]. We have reported that the hybrid films of aminoazobenzene-based amorphous molecular materials with organic acids exhibited drastic and reversible color changes in response to moisture [20].…”

Effect of rigidity of microenvironment on fluorescence of 7,7,8,8-tetracyanoquinodimethane (TCNQ)

“…Rearrangement of polymer chains to be adapted to the structural deformation of TCNQ is suppressed in the rigid glass state in comparison to the rubber state. [25,26] Therefore, the fluorescence intensity is expected to show variation, when the temperature is changed across Tg. We use three different polymers, poly(methyl acrylate) (PMA), poly(vinyl acetate) (PVAc), and poly(methyl methacrylate) (PMMA) (Fig.…”