Issue 35, 2012
From the journal:

Journal of Materials Chemistry

The 2D-correlated structures of a lyotropic liquid crystalline diol with a phenylpyrimidine core†

Johanna R. Bruckner,a   Daniel Krueerke,a   Jan H. Porada,b   Stefan Jagiella,a   Dirk Blunkc  and  Frank Giesselmann*a  

* Corresponding authors

a Institute of Physical Chemistry, University of Stuttgart, 70569 Stuttgart, Germany
E-mail: f.giesselmann@ipc.uni-stuttgart.de
Fax: +49 (0)711/685-62569
Tel: +49 (0)711/685-64460

b Department of Chemistry and Biochemistry, University of Colorado, 80309 Boulder, CO, USA

c Institute of Organic Chemistry, University of Cologne, 50939 Köln, Germany

Abstract

Even though the fluid tilted smectic C (SmC) phase is one of the most common phases in thermotropic liquid crystals, the lyotropic analogue to SmC is practically unknown so far. One of the rare examples, a lyotropic liquid crystalline diol, which was reported in 1991 to show this phase, was re-examined by means of detailed X-ray diffraction and polarised optical microscopy. Although the diol possesses a smectic C promoting phenylpyrimidine core, it was not possible to verify the existence of a SmC-analogue lyotropic phase. Instead, the phase diagram shows the existence of five different lyotropic phases identified as nematic, lamellar Lα and hexagonal as well as two novel complex 2D-correlated lyophases. Results obtained by electron density calculations and X-ray diffraction data strongly suggest that the structure of one of these phases possesses a pseudo-c2mm symmetry and is built up of two different kinds of columns, whereas the other one is a ribbon phase of the oblique plane group p2.

Graphical abstract: The 2D-correlated structures of a lyotropic liquid crystalline diol with a phenylpyrimidine core

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Article information

DOI
https://doi.org/10.1039/C2JM32868B
Article type
Paper
Submitted
07 May 2012
Accepted
16 Jul 2012
First published
17 Jul 2012

J. Mater. Chem., 2012,22, 18198-18203

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The 2D-correlated structures of a lyotropic liquid crystalline diol with a phenylpyrimidine core

J. R. Bruckner, D. Krueerke, J. H. Porada, S. Jagiella, D. Blunk and F. Giesselmann, J. Mater. Chem., 2012, 22, 18198 DOI: 10.1039/C2JM32868B

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