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Issue 44, 2005
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Novel chiral filament in an achiral W-shaped liquid crystalline compound

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Abstract

Anomalous optical birefringence and optical rotation have been observed in a liquid crystal phase comprising of W-shaped liquid crystal molecules with hydrogen bonds. The texture of this phase exhibits characteristic chiral filaments, which form strongly segregated chiral domains similar to the B4 phase of conventional bent-core mesogens, despite of having no chiral carbon. Based on X-ray microbeam diffraction, polarizing and confocal optical microscope observations, the molecular arrangement in the filament is discussed, and the novel structure different from that in B4 is proposed; the smectic layers form concentric cylinder, on which the c-director of the W-shaped molecules form screw-like and/or polar arrangement, inducing herringbone anisotropic structure and chirality in each filament, as observed in the experiments.

Graphical abstract: Novel chiral filament in an achiral W-shaped liquid crystalline compound

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Publication details

The article was received on 01 Jul 2005, accepted on 02 Sep 2005 and first published on 28 Sep 2005


Article type: Paper
DOI: 10.1039/B509213B
J. Mater. Chem., 2005,15, 4688-4694

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    Novel chiral filament in an achiral W-shaped liquid crystalline compound

    I. Miyake, Y. Takanishi, N. V. S. Rao, M. Kr. Paul, K. Ishikawa and H. Takezoe, J. Mater. Chem., 2005, 15, 4688
    DOI: 10.1039/B509213B

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