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Materials 2014, 7(5), 4045-4056; doi:10.3390/ma7054045
Article

Novel Discotic Boroxines: Synthesis and Mesomorphic Properties

,
 and
*
Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, Stuttgart D-70569, Germany
* Author to whom correspondence should be addressed.
Received: 8 April 2014 / Revised: 7 May 2014 / Accepted: 8 May 2014 / Published: 22 May 2014
(This article belongs to the Special Issue Liquid Crystals)
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Abstract

A new synthetic approach to highly substituted triphenylboroxines 11 is described. Their mesomorphic properties were investigated by differential scanning calorimetry (DSC), polarizing optical microscopy (POM) and X-ray diffraction (SAXS, WAXS). The tris(3,4,5-trialkyloxy)phenyl functionalized derivatives 11be showed broad mesophases for a minimum alkyl chain length of C9. The phase widths ranged from 110 K to 77 K near room temperature, thus decreasing with enhanced alkyl chain lengths. Textures observed under POM indicated a columnar hexagonal (Colh) mesophase symmetry that was confirmed by X-ray diffraction experiments.
Keywords: boroxines; liquid crystals; columnar; synthesis boroxines; liquid crystals; columnar; synthesis
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Wöhrle, T.; Baro, A.; Laschat, S. Novel Discotic Boroxines: Synthesis and Mesomorphic Properties. Materials 2014, 7, 4045-4056.

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