Photosensitive bent-core nematic liquid crystals with various linking units in the side arms: structure-properties relationships

0531928 - FZÚ 2021 RIV NL eng J - Journal Article
Šmahel, M. - Poryvai, A. - Xiang, Y. - Pociecha, D. - Troha, Tinkara - Novotná, Vladimíra - Svoboda, J. - Kohout, M.
Photosensitive bent-core nematic liquid crystals with various linking units in the side arms: structure-properties relationships.
Journal of Molecular Liquids. Roč. 306, May (2020), s. 1-11, č. článku 112743. ISSN 0167-7322. E-ISSN 1873-3166
R&D Projects: GA ČR GA19-03564S
Grant - others:AV ČR(CZ) PAN-17-04
Program: Bilaterální spolupráce
Institutional support: RVO:68378271
Keywords : liquid crystals * azo compounds * photosensitivity * nematics * bent-core mesogens
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 6.165, year: 2020
Method of publishing: Limited access
https://doi.org/10.1016/j.molliq.2020.112743

We present two isomeric series of photosensitive bent-core liquid crystals possessing a lateral chlorine atom in the central resorcinol unit and various linking units in the side arms. With the aim to tune properties of the nematic phase, we have varied the type of the linking unit in the lengthening arm with rising rigidity from benzoate ester, biphenyl, cinnamate, Schiff base to stilbene moieties. In addition to that, we have changed the position of the lateral substituent (chlorine) as well. The mesomorphic properties of the materials have been determined from differential scanning calorimetry, polarizing optical microscopy, dielectric spectroscopy and X-ray studies. We show that synergy of the linking unit with the effect of the lateral substituent gives rise to broad temperature range of mesophases.
Permanent Link: http://hdl.handle.net/11104/0310607