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Issue 14, 2009
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Synthesis and mesomorphic properties of new V-shaped shape-persistent nematogens containing a thiazole or a thiadiazole bending unit

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Abstract

Two series of new V-shaped molecules, containing a central thiazole or thiadiazole bending unit have been synthesised. The design is based on shape-persistent phenylene ethynylene scaffolds that were attached stepwise with high regioselectivity to a desymmetrised iodo and bromo functionalised bent core with an apex angle of about 160°. Molecular engineering results in materials that exhibit exclusively nematic liquid crystal phases (monotropic or enantiotropic). The phase behaviour was investigated by means of polarised optical microscopy (POM), differential scanning calorimetry (DSC) and X-ray diffraction.

Graphical abstract: Synthesis and mesomorphic properties of new V-shaped shape-persistent nematogens containing a thiazole or a thiadiazole bending unit

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Publication details

The article was received on 05 Nov 2008, accepted on 21 Jan 2009 and first published on 27 Feb 2009


Article type: Paper
DOI: 10.1039/B818240J
Citation: J. Mater. Chem., 2009,19, 1978-1988
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    Synthesis and mesomorphic properties of new V-shaped shape-persistent nematogens containing a thiazole or a thiadiazole bending unit

    M. Lehmann, J. Seltmann, A. A. Auer, E. Prochnow and U. Benedikt, J. Mater. Chem., 2009, 19, 1978
    DOI: 10.1039/B818240J

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