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Issue 12, 2002
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Bent-shaped mesogens without an azomethine joint

Jozef Mieczkowski,a  Jadwiga Szydlowska,*a  Joanna Matraszek,a  Damian Pociecha,a  Ewa Gorecka,ab  Bertrand Donniob  and  Daniel Guillonb 
Author affiliations

* Corresponding authors

a Department of Chemistry, Warsaw University, Al. Zwirki i Wigury 101, 02-089 Warsaw, Poland
E-mail: jadszyd@chem.uw.edu.pl
Fax: +48 22 8221075
Tel: +48 22 8221075

b Institut de Physique et Chimie des Matériaux de Strasbourg, Groupe des Matériaux Organiques, 23 rue du Loess, 67037 Strasbourg Cedex, France

Abstract

A new series of banana-shaped mesogens with ethylene links in the branches and laterally substituted are presented. They form B1, B2, B6 and B7-like phases. The B7-like and B2 phases are not miscible although identical crystallographic structures are deduced from X-ray studies. The switching in the B7-like phase is without a threshold and occurs only in a small number of domains. Dielectric measurements do not confirm ferroelectric properties for the B7-like phase, and only a weak non-collective relaxation process was observed. In the B2 phase a collective and weak dielectric mode was detected. The B1 phase exhibits a columnar structure with a large rectangular cell 111.6 × 51 Å2.

Graphical abstract: Bent-shaped mesogens without an azomethine joint

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Publication details

The article was received on 24 May 2002, accepted on 19 Aug 2002 and first published on 12 Sep 2002


Article type: Paper
DOI: 10.1039/B205036F
J. Mater. Chem., 2002,12, 3392-3399

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    Bent-shaped mesogens without an azomethine joint

    J. Mieczkowski, J. Szydlowska, J. Matraszek, D. Pociecha, E. Gorecka, B. Donnio and D. Guillon, J. Mater. Chem., 2002, 12, 3392
    DOI: 10.1039/B205036F

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