Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 5, 2007
Previous Article Next Article

Influence of the core structure on the development of polar order and superstructural chirality in liquid crystalline phases formed by silylated bent-core molecules: lateral substituents

Author affiliations

Abstract

The influence of lateral substituents was studied for a new series of bent-core liquid crystals with heptamethyltrisiloxane units at both ends of the aliphatic side chains. These materials were investigated by polarized light microscopy, differential scanning calorimetry, X-ray scattering and electro-optical methods. An antiferroelectric switching columnar phase was found for the non-substituted compound. Different types of non-switching columnar phases were obtained for molecules having substituents (CH3, NO2) in the bay position, whereas a temperature-dependent transition from polar to non-polar smectic phases was found for molecules having substituents (Cl, CN) adjacent to one of the ester linking units. For the CN-substituted compound a new phase sequence SmCPA–SmC–CubV–Iso was observed. The occurrence of the cubic phase is associated with a steric frustration due to the bulky silyl groups. The special rectangular columnar mesophase of the nitro-substituted compound is discussed with respect to its relation to B7-type mesophases.

Graphical abstract: Influence of the core structure on the development of polar order and superstructural chirality in liquid crystalline phases formed by silylated bent-core molecules: lateral substituents

Back to tab navigation

Supplementary files

Article information


Submitted
31 Oct 2006
Accepted
12 Dec 2006
First published
25 Jan 2007

Soft Matter, 2007,3, 558-570
Article type
Paper

Influence of the core structure on the development of polar order and superstructural chirality in liquid crystalline phases formed by silylated bent-core molecules: lateral substituents

R. Amaranatha Reddy, U. Baumeister, C. Keith, H. Hahn, H. Lang and C. Tschierske, Soft Matter, 2007, 3, 558
DOI: 10.1039/B615791B

Social activity

Search articles by author

Spotlight

Advertisements