High tilted smectogens with bromine-substituted molecular core

0391606 - FZÚ 2014 RIV GB eng J - Journal Article
Podoliak, Natalia - Hamplová, Věra - Kašpar, Miroslav - Novotná, Vladimíra - Glogarová, Milada - Pociecha, D. - Gorecka, E.
High tilted smectogens with bromine-substituted molecular core.
Liquid Crystals. Roč. 40, č. 3 (2013), 321-328. ISSN 0267-8292. E-ISSN 1366-5855
R&D Projects: GA ČR(CZ) GAP204/11/0723; GA AV ČR IAA100100911
Grant - others:AVČR(CZ) M100101211
Institutional support: RVO:68378271
Keywords : liquid crystals * smectic phases * ferroelectricity * orthoconic
Subject RIV: JJ - Other Materials
Impact factor: 2.349, year: 2013

We synthesized a series of rod-like mesogens with a Br atom laterally substituted in the molecular core, which consists of four benzene rings, namely one biphenyl and two phenyl rings connected by ester bridges. In the terminal chiral chain a lactate unit has been utilized. The SmA* and SmC* phases have been established in broad temperature ranges. The physical properties of the materials have been studied. The temperature dependences of the spontaneous quantities, polarization and tilt angle, have been measured as well as the helical pitch, layer spacing measurements and dielectric spectroscopy have been performed. Tilt angle reaches a rather high value up to 45 deg. on cooling.
Permanent Link: http://hdl.handle.net/11104/0220612