The mixtures of chiral and non-chiral tilted smectic C liquid crystals which contain wide ferroelectric phase

摘要

A new liquid crystal of a siloxane dimer with an achiral swallow-tail, C11Si3C11, was synthesized and mixed with a chiral material as a chiral dopant, 4′-[11-(1,1,2,2,3,3,3-heptamethyltrisiloxanyl) undecyloxy) biphenyl-4-carboxylate, C11Si3 , to prepare binary mixtures for this study. The mesophases under consideration were investigated by means of polarizing optical microscopy, differential scanning calorimetry, X-ray diffraction, and electro-optical experiments. The influence of the mixture proportion of C11Si3 on the occurrence of the chiral smectic C (SmC*) phase was investigated. Finally, the electro-optical properties of the SmC* phase such as tilt angle, dielectric permittivity, and switching behavior were also measured. As a consequence, the correlation between the electro-optical properties and mixture proportion was determined.View full textDownload full textKeywordsdifferential scanning calorimetry, electrical characterization, liquid crystalsRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/02533839.2011.591550