Author/Editor | Gorecka, E; Pociecha, D; Čepič, Mojca; Žekš, Boštjan; Dabrowski, R | |
Title | Enantiomeric excess dependence of the phase diagram of antiferroelectric liquid crystals | |
Type | članek | |
Source | Phys Rev, E Stat Phys Plasmas Fluids Relat | |
Vol. and No. | Letnik 65 | |
Publication year | 2002 | |
Volume | str. 061703-1-4 | |
Language | eng | |
Abstract | The phase diagram of the prototype antiferroelectric liquid crystal 4-(1-methylheptyloxycarbonyl)phenyl-4'-octyloxybiphengl-4-carbox ylate (MHPOBC) in dependence of enantiomeric excess was measured. It was shown that the Sm-C` phase in very pure samples is the Sm-C*F/2 phase with a four-layer structure, and only after small racemization it transforms into the ferroelectric Sm-C* phase. The phase diagram was theoretically explained by taking into account longer range bilinear and short range biquadratic interlayer interactions, that lead to the distorted clock structures and first-order transitions between them. | |
Descriptors | BIOPHYSICS CRYSTALLIZATION ELECTROMAGNETIC FIELDS STEREOISOMERISM |