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Issue 2, 2005
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Unusual smectic phases organized by novel λ-shaped mesogenic molecules

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Abstract

A homologous series of novel λ-shaped mesogenic compounds in which three mesogenic groups are connected to 3, 4-dihydroxybenzoic acid has been prepared and their physical properties investigated by means of optical microscopy, differential scanning calorimetry and X-ray diffraction measurements. The λ-shaped compounds studied showed unusual smectic phases. 4-Cyanobiphenyl-4′-yl 3,4-bis{6-[4-(5-octylpyrimidin-2-yl)phenyloxy]hexyloxy}benzoate was found to realize an incommensurate SmA (SmAinc) phase. A “uniform planarly” aligned sample of 2-(4-octylphenyl)pyrimidin-5-yl 3,4-bis{6-[4-(5-octylpyrimidin-2-yl)phenyloxy]hexyloxy} benzoate showed a Schlieren-like texture in the smectic phase. We discuss structural effects of the λ-shaped compounds on molecular organization in liquid-crystalline phases.

Graphical abstract: Unusual smectic phases organized by novel λ-shaped mesogenic molecules

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Publication details

The article was received on 04 May 2004, accepted on 09 Sep 2004 and first published on 23 Sep 2004


Article type: Paper
DOI: 10.1039/B406716A
Citation: J. Mater. Chem., 2005,15, 280-288
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    Unusual smectic phases organized by novel λ-shaped mesogenic molecules

    A. Yamaguchi, I. Nishiyama, J. Yamamoto, H. Yokoyama and A. Yoshizawa, J. Mater. Chem., 2005, 15, 280
    DOI: 10.1039/B406716A

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