Chirality transfer across length-scales in nematic liquid crystals: fundamentals and applications
- 11 October 2010
- journal article
- review article
- Published by Royal Society of Chemistry (RSC) in Chemical Society Reviews
- Vol. 40 (1), 258-271
- https://doi.org/10.1039/b924962c
Abstract
When a chiral dopant is dissolved in an achiral liquid crystal medium, the whole sample organizes into a helical structure with a characteristic length-scale of the order of microns. The relation between chirality at these quite different length-scales can be rationalized by a relatively simple model, which retains the relevant factors coming into play: the molecular shape of the chiral dopant, which controls the chirality of short range intermolecular interactions, and the elastic properties of the nematic environment, which control the restoring torques opposing distortion of the director. In this tutorial review the relation between molecular and phase chirality will be reviewed and several applications of the chiral doping of nematic LCs will be discussed. These range from the exploitation of the amplified molecular chirality for stereochemical purposes (e.g., the determination of the absolute configuration or the enantiomeric excess), to newer applications in physico–chemical fields. The latter take advantage of the periodicity of the chiral field, with length-scales ranging from hundreds to thousands of nanometres, which characterise the cholesteric phase.Keywords
This publication has 64 references indexed in Scilit:
- Solute−Solvent Interactions and Chiral Induction in Liquid CrystalsJournal of the American Chemical Society, 2005
- Reversible‐Photon‐Mode Full‐Color Display by Means of Photochemical Modulation of a Helically Cholesteric StructureAdvanced Materials, 2005
- Cholesteric Liquid Crystals for Color Information TechnologyAdvanced Materials, 2001
- Supramolecular Detection of Metal Ion Binding: Ligand Conformational Control of Cholesteric Induction in Nematic Liquid Crystalline PhasesChemistry – A European Journal, 2001
- Molecular surface and order parameters in liquid crystalsLiquid Crystals, 1999
- Twisting power of bridged binaphthol derivatives: comparison of theory and experimentLiquid Crystals, 1998
- A Pictorial Approach to Helical Macrostructures in Smectic Liquid CrystalsMolecular Crystals and Liquid Crystals, 1997
- A conformational analysis of mono and dialkyl ethers of 2,2′‐dihydroxy‐1,1′‐binaphthalene by circular dichroism spectroscopy and cholesteric induction in nematic liquid crystalsChirality, 1995
- A study of solvent effect on the optical rotation of chiral biarylsThe Journal of Physical Chemistry, 1991
- Solvation energy in protein folding and bindingNature, 1986