Issue 37, 2005
From the journal:

Journal of Materials Chemistry

Self-assembly of hydrogen-bonded molecules: discotic and elliptical mesogens

E. Johan Foster,a   Christine Lavigueur,a   Ying-Chieh Kea  and  Vance E. Williams*a  

* Corresponding authors

a Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, British Columbia, Canada
E-mail: vancew@sfu.ca
Fax: +1 604 291 3765
Tel: +1 604 415 3481

Abstract

The effect of hydrogen bonding on the phase behaviour of discotic mesogens was investigated with a series of dibenzophenazine carboxylic acids and their methyl ester analogues. The esters exhibit only columnar hexagonal phases, while the acids form columnar hexagonal, columnar rectangular and nematic mesophases. The acids have much higher transition temperatures and supercool to room temperature while maintaining the liquid crystalline ordering. These differences could be explained by the ability of the acids to form hydrogen-bonded dimers, which may also be regarded as supramolecular elliptically-shaped mesogens.

Graphical abstract: Self-assembly of hydrogen-bonded molecules: discotic and elliptical mesogens

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Article information

DOI
https://doi.org/10.1039/B503310A
Article type
Paper
Submitted
07 Mar 2005
Accepted
08 Jul 2005
First published
12 Aug 2005

J. Mater. Chem., 2005,15, 4062-4068

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Self-assembly of hydrogen-bonded molecules: discotic and elliptical mesogens

E. J. Foster, C. Lavigueur, Y. Ke and V. E. Williams, J. Mater. Chem., 2005, 15, 4062 DOI: 10.1039/B503310A

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