Effect of alkyl chains length on properties of ferroelectric liquid crystals with the keto group attached to the molecule core

0382178 - FZÚ 2013 RIV GB eng J - Journal Article
Bubnov, Alexej - Novotná, Vladimíra - Pociecha, D. - Hamplová, Věra - Kašpar, Miroslav
Effect of alkyl chains length on properties of ferroelectric liquid crystals with the keto group attached to the molecule core.
Phase Transitions. Roč. 85, č. 10 (2012), s. 849-860. ISSN 0141-1594. E-ISSN 1029-0338
R&D Projects: GA ČR(CZ) GAP204/11/0723
Grant - others:AV ČR(CZ) M100101211; AV ČR(CZ) M100101204
Institutional research plan: CEZ:AV0Z10100520
Keywords : ferroelectric liquid crystal * keto group * lactic acid derivative * spontaneous quantities * SAXS * helix pitch
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 0.863, year: 2012
http://www.tandf.co.uk/journals/titles/01411594.asp

In order to contribute to better understanding of the molecular structure – physical property relationship, properties of ferroelectric liquid crystalline materials derived from the lactic acid with the keto group in the molecular core has been studied. These compounds differing only by the length of the chiral and non-chiral alkyl chains exhibit the paraelectric SmA* and the ferroelectric SmC* phase over 150 K broad temperature range down to the room temperature. Temperature dependences of spontaneous polarization, tilt angle, layer spacing, helix pitch length and dielectric permittivity has been compared and discussed for all studied compounds. The effect of the alkyl chains length on mesomorphic properties has been established and discussed in comparison to that of similar materials.
Permanent Link: http://hdl.handle.net/11104/0212475