Photosensitive bent-core liquid crystals based on methyl substituted 3-hydroxybenzoic acid.

0478803 - FZÚ 2018 RIV GB eng J - Článek v odborném periodiku
Kohout, M. - Alaasar, M. - Poryvai, A. - Novotná, Vladimíra - Poppe, S. - Tschierske, C. - Svoboda, J.
Photosensitive bent-core liquid crystals based on methyl substituted 3-hydroxybenzoic acid.
RSC Advances. Roč. 7, č. 57 (2017), s. 35805-35813. E-ISSN 2046-2069
Grant CEP: GA ČR GA16-12150S
Institucionální podpora: RVO:68378271
Klíčová slova: liquid crystals * photosensitivity * bent-core liquid crystals * 3-hydroxybenzoic acid
Obor OECD: Nano-materials (production and properties)
Impakt faktor: 2.936, rok: 2017

Photosensitive liquid crystals are of contemporary interest not only from the scientific point of view but also for various applications. Herein we report the first photosensitive materials based on laterally substituted 3-hydroxybenzoic acid. We show that the number and position of azo units with respect to the lateral substitution on the molecular core significantly influences mesomorphic properties of the materials. Based on the position of the substituent, either non-polar or polar antiferroelectric smectic C phases are formed. The optimum combination of both the structural elements results in an achiral material which shows a broad polymorphism and exhibits a room temperature stable dark conglomerate phase with macroscopically chiral domains.
Trvalý link: http://hdl.handle.net/11104/0274872