119th General Meeting of the KCS

Type Poster Presentation
Area 고분자화학
Room No. 포스터발표장
Time 4월 21일 (금요일) 13:00~14:30
Code POLY.P-8
Subject Multi-stimuli Responsive Photochromic Molecules with Chiral Naphthyl-based Azobenzene Moieties
Authors 황주경, 정광운1,*
전북대학교 고분자나노공학과, Korea
1전북대학교 고분자.나노 공학과, Korea
Abstract For the development of chameleon-like color changeable molecules with respect to various external stimuli, a photochromic chiral molecule with (R)-configuration naphthyl moiety and azobenzene mesogens (abbreviated as CNA2M) was newly designed and synthesized. From thermal and microscopic analyses, the basic phase transition behaviors of CNA2M were first studied. It was recognized that CNA2M formed a tilted version of a highly ordered smectic crystal phase with a layered structure based on structure-sensitive X-ray diffraction results. By doping the CNA2M chiral molecule into an achiral nematic liquid crystal (LC) medium, chiral nematic (N*) LC phase with helical superstructures were formed. The reflection colors of N*-LC films were precisely tuned by changing the helical pitch length of N*-LC responding to temperature, light and electric field. The multi-stimuli responsive chameleon molecule may allow us to fabricate the reversible modulating devices including remote-controllable photo-responsive devices covering the whole visible region. This work was mainly supported by BRL (2015042417), MOTIE (10047806), Mid-Career Researcher Program (2016R1A2B2011041), and BK21 Plus program, Korea.
E-mail iamjoook@gmail.com