Design of polar self-assembling lactic acid derivatives possessing submicrometre helical pitch

0489484 - FZÚ 2019 RIV DE eng J - Článek v odborném periodiku
Bubnov, Alexej - Vacek, C. - Czerwiński, M. - Vojtylová, Terézia - Piecek, W. - Hamplová, Věra
Design of polar self-assembling lactic acid derivatives possessing submicrometre helical pitch.
Beilstein Journal of Nanotechnology. Roč. 9, Jan (2018), s. 333-341. ISSN 2190-4286. E-ISSN 2190-4286
Grant CEP: GA ČR GA16-12150S; GA MŠMT(CZ) LH15305
Institucionální podpora: RVO:68378271
Klíčová slova: ferroelectric liquid crystal * sub-micrometre helical pitch length * keto group * soft ferroelectrics * self-assembly on the nanoscale
Obor OECD: Materials engineering
Impakt faktor: 2.269, rok: 2018

Several new lactic acid derivatives containing the keto linkage group far from the chiral part and short alkyl chains have been synthesized and characterised by polarising optical microscopy, differential scanning calorimetry, as well as electro-optic and dielectric spectroscopy. The materials possess a self-assembling behaviour on the nanoscale level as they form polar smectic liquid crystalline mesophases, namely the orthogonal paraelectric SmA* and the tilted ferroelectric SmC* phases, in a broad temperature range down to room temperature. A short helical pitch (approximate to 120-320 nm), relatively high spontaneous polarisation (approximate to 150 nC/cm(2)) and reasonable tilt angle values have been determined within the temperature range of the tilted ferroelectric SmC* phase. The obtained results make the new materials useful for the advanced mixture design and for further utilisation in electro-optic devices based on the deformed helix ferroelectric effect.
Trvalý link: http://hdl.handle.net/11104/0283904