Bent-core liquid crystals based on 6-substituted 3-hydroxybenzoic acid: the role of substitution and linkage group orientation on mesomorphic properties

0471345 - FZÚ 2017 RIV GB eng J - Článek v odborném periodiku
Tůma, J. - Kohout, M. - Svoboda, J. - Novotná, Vladimíra - Pociecha, D.
Bent-core liquid crystals based on 6-substituted 3-hydroxybenzoic acid: the role of substitution and linkage group orientation on mesomorphic properties.
Liquid Crystals. Roč. 43, č. 12 (2016), s. 1889-1900. ISSN 0267-8292. E-ISSN 1366-5855
Grant CEP: GA ČR GA15-02843S
Institucionální podpora: RVO:68378271
Klíčová slova: liquid crystals
Kód oboru RIV: JJ - Ostatní materiály
Impakt faktor: 2.661, rok: 2016

We have prepared and studied new series of bent-core liquid crystals based on laterally substituted 3-hydroxybenzoic acid. The physical properties of the materials were tuned by the type of lateral substitution in the vicinity of the carboxylic unit. Further modification was achieved by reorientation of connecting ester linkages in the elongating side arms and by changing the length of terminal alkyl chains. The physical properties of the materials were determined by differential scanning calorimetry (DSC), polarising optical microscopy and for selected compounds by x-ray diffraction analysis. The introduction of fluorine as lateral substituent leads to the appearance of a lamellar or columnar mesophase. On contrary, methyl- or chlorine-substituted compounds are mostly crystalline. We have found a strong correlation between the size of the lateral substituent and the mesogenicity of the studied materials.
Trvalý link: http://hdl.handle.net/11104/0268731