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| Type |
Poster Presentation |
| Area |
Organic Chemistry |
| Room No. |
Exhibition Hall 2 |
| Time |
4월 18일 (목요일) 11:00~12:30 |
| Code |
ORGN.P-140 |
| Subject |
Ferroelectric Switching Property of a 1,2,3-Triazole-based Helical Columnar Liquid Crystal |
| Authors |
Byoung-Ki Cho*, Manh Linh Nguyen1
Department of Chemistry, Dankook University, Korea
1Chemistry, Dankook University, Korea
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| Abstract |
Recently, the ferroelectric columnar liquid crystals (LCs) have been drawing a great deal of attention due to its promising application as electronic materials. To pursue such LC materials, we speculated that the helical assembly and proper functional groups would be key factors. Here we designed a naphthalene derivative based on 1,2,3-triazolyl linkage through Click reaction because the resulting asymmetric triazole has structural rigidity and high dipole moment (4.55 Debye). The rotation of triazolyl group could result in two different cisoid and transoid conformation which have non-zero and zero dipole moments, respectively. As revealed by X-ray scattering and X-ray simulation, the molecules adopt the cisoid conformation to form a double-stranded helical columnar LC (Colhel) with a non-zero axial polarization. The homeotropic alignment could be done in both thin (5 μm) and bulk-level film (250 μm) on cooling from isotropic liquid phase (Liq) to Colhel under the application of an E-field. The switching experiments demonstrated the polar switching behavior in the temperature range from 105 to 115 oC. On the other hand, the ferroelectric switching was not observed at lower temperature Colhel such as 80 oC. This result can be explained by the weakening of H-bonding with increasing temperature. All details will be addressed in the poster presentation. |
| E-mail |
72160366@dankook.ac.kr |
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123rd General Meeting of the KCS