123rd General Meeting of the KCS

Type Symposium
Area Current Trends in Organic Chemistry III: Functional Organic Molecules
Room No. Room 301+302
Time FRI 14:30-14:55
Code ORGN3-1
Subject Electric-Field Responsive Columnar Assemblies of 1,2,3-Triazole-based Liquid Crystals
Authors Byoung-Ki Cho
Department of Chemistry, Dankook University, Korea
Abstract One dimensional (1D) columnar organization of -conjugated aromatic building blocks is an interesting research topic because the electric and photophysical functions can be engineered by the orientation and packing order of columnar domains. Recently, we have studied columnar liquid crystals based on 1,2,3-triazole group which is capable of the hydrogen-bonding interaction and response to electric-field. As examples, we designed several columnar-forming molecules based on polar 1,2,3-triazole group. The columnar LC thin- and bulk-level films could be macroscopically aligned under E-field. The uniform orientation over a large film area could be achieved by a quick and easy E-field method. Moreover, an LC molecule consisting of a naphthalene core dominantly adopted cisoid conformer with non-zero dipole moment which organized into a double helical columnar structure in the LC state. The columnar LC structure showed a ferroelectrically switching property which is, to our knowledge, the first example containing triazole unit as the polar unit to date. The details regarding these issues will be addressed in the presentation.
E-mail chobk@dankook.ac.kr