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

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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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Article information


Submitted
24 May 2002
Accepted
19 Aug 2002
First published
12 Sep 2002

J. Mater. Chem., 2002,12, 3392-3399
Article type
Paper

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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