Variety of mesophases in compounds with an increasing number of lactate units in the chiral chain

0391668 - FZÚ 2014 RIV GB eng J - Journal Article
Novotná, Vladimíra - Hamplová, Věra - Kašpar, Miroslav - Podoliak, Natalia - Pociecha, D.
Variety of mesophases in compounds with an increasing number of lactate units in the chiral chain.
Liquid Crystals. Roč. 40, č. 1 (2013), 14-21. ISSN 0267-8292. E-ISSN 1366-5855
R&D Projects: GA ČR(CZ) GAP204/11/0723
Grant - others:AVČR(CZ) M100101211
Institutional support: RVO:68378271
Keywords : liquid crystals * lactate derivatives * TGB phases * hexatic phase
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.349, year: 2013

Liquid-crystalline compounds with different number of lactate unit, n, in the chiral part were synthesized and mesomorphic properties studied. Physical properties have been compared with respect to n. In compound with one lactate unit the TGBA-TGBC-SmC* phase sequence has been detected. For two lactate units the antiferroelectric SmC*A phase occurs. Finally, three-lactate material exhibits the tilted hexatic SmI*(F*) phase below the ferroelectric SmC* phase. Dielectric spectroscopy and spontaneous tilt and polarization have been measured. Namely, for the three-lactate compound the temperature dependences have been analysed in the vicinity of the SmC*-hexatic phase transition and these properties compared with the theoretically predicted behaviour.
Permanent Link: http://hdl.handle.net/11104/0220656