Abstract
Liquid crystals self-organize their mesophases by the effect either of a temperature or of a solvent concentration. They all organize their longitudinal molecular axes parallel to each other, with the molecular centres distributed either isotropically or organized in layers. A special array of nematic planes stacked in a “superhelical” structure is known as cholesteric. A parallelism can be found between the behaviour of liquid crystals in materials science and lipids in life science. Two thermotropic liquid crystal polyesters with the same rigid mesogene along the main chain and different lateral chain lengths in the spacer are synthesized in the chapter. By following a synthesis route, the polymers PTOBEE and PTOBDME are reported as cholesteric. The chapter discusses the behaviour of cholesteric PTOBEE and PTOBDME in aqueous medium following their interaction with lipid membranes by steady-state fluorescence and simultaneous SAXS/WAXS using a synchrotron radiation. Their chiral behaviour with liposomes of racemic lipid or enantiomeric lipid is also described in the chapter. The chapter also discusses their application as drug-delivery systems.
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