123rd General Meeting of the KCS

Type Poster Presentation
Area Organic Chemistry
Room No. Exhibition Hall 2
Time 4월 18일 (목요일) 11:00~12:30
Code ORGN.P-183
Subject Helical Columnar Assemblies of Discotic liquid crystals based 1,2,3-triazole depending on chain structure
Authors Youngmin Lee, Byoung-Ki Cho*
Department of Chemistry, Dankook University, Korea
Abstract 1,2,3-Triazole that can be easily synthesized by copper-catalyzed click reaction, is an asymmetric aromatic group, and thereby would be a useful structural motif in the design of functional liquid crystals (LCs). Recently, we synthesized two types of 1,2,3-triazole based C3-symmetric LCs through the click reaction of 1,3,5-triethynylbenzene and 4-azido-1,2-bis(alkoxy)benzene. Two LCs consist of different aliphatic chains, which are linear and chiral chains, respectively. The LCs were characterized using differential scanning calorimetry (DSC), wide-angle X-ray scattering (WAXS), grazing-incidence wide-angle X-ray Scattering (GIWAXS) and dielectric relaxation spectroscopy (DRS). The LC with chiral chains showed a melting transition at 105.8 ℃, while the LC with linear chains shows no melting transition. From the GIWAXS analyses the LCs exhibited different helical columnar structures at room temperature. This structural difference can be explained by the packing variation which might be affected by the chain structure. All the details will be addressed in poster presentation.
E-mail dudals1784@naver.com