Photo-responsive Thin Films based on Self-Assembled Hierarchical Superstructure of Benzene-1,3,5-Tricarboxamide
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초록
내용
We newly synthesized benzene-1,3,5-tricarboxamide containing photo-responsive azobenzene groups (denoted as BTAZO). Based on the structure analysis, it was found that BTAZO was self-assembled to nanocoulmns mainly driven by the intermolecular hydrogen bonds between BT core. BTAZO exhibited the phase sequence of a low-ordered hexagonal columnar liquid crystal (фLC) phase, a highly-ordered LC phase (KLC), and a lamello-columnar crystal phase (KCr). From hierarchical superstructure of BTAZO, free-standing films were obtained by drop casting process. Because of azobenzene groups tethered to the BT core, 3D networked BTAZO thin films can be switched the shape and color by controlled the wavelength of light as well as writing/erasing. This materials will be of great help in contributing to the photo-responsive smart sensor. This work was supported by BK21 Plus program, BRL 2015042417, and Mid-Career Researcher Program (2016R1A2B2011041).