Multichiral liquid crystals based on terphenyl core laterally substituted by chlorine atom

0543937 - FZÚ 2022 RIV NL eng J - Journal Article
Podoliak, Natalia - Cigl, Martin - Hamplová, Věra - Pociecha, D. - Novotná, Vladimíra
Multichiral liquid crystals based on terphenyl core laterally substituted by chlorine atom.
Journal of Molecular Liquids. Roč. 336, Aug (2021), č. článku 116267. ISSN 0167-7322. E-ISSN 1873-3166
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA MŠMT LTC19051
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : lactic acid derivatives * smectics * antiferroelectric
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 6.633, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.molliq.2021.116267

We designed a new type of antiferroelectric liquid crystalline structure with versatile properties. For this purpose, we modified the previously studied liquid crystalline compounds based on terphenyl molecular core laterally substituted by a chlorine atom. Two lactate units were attached to the chiral chain with the aim to support antiferroelectric structures. We studied the mesomorphic properties of new compounds by means of texture observations under a polarising microscope, by dielectric spectroscopy and electro-optical measurements. To confirm the phase identification, x-ray measurements were performed. We found that the studied compounds revealed a SmA-SmC* phase sequence in a broad temperature range. We proved an antiferroelectric phase with orthoconic properties for selected structural modifications. Such valuable optical properties with the tilt angle about 45 degrees promise a big potential for applications.
Permanent Link: http://hdl.handle.net/11104/0321031