Synthesis and properties of novel columnar liquid crystals based on symmetrical and non-symmetrical 1,3,5-trisubstituted benzene derivatives

In this structure-property correlation study we have investigated a number of novel disc-shaped compounds incorporating a 1,3,5-trisubstituted benzene at the central core. All the materials with peripheral arms attached through an ester linkage exhibited a columnar phase (Col r or Col h ). The sole...

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Bibliographic Details
Published in:Liquid crystals 2010-09, Vol.37 (9), p.1191-1203
Main Authors: Stackhouse, Philip J., Wilson, Adam, Lacey, David, Hird, Michael
Format: Article
Language:English
Subjects:
Chemical synthesis
columnar
Correlation analysis
discotic
Hydrocarbons
Liquid crystal polymers
liquid crystals
Phase transitions
Studies
synthesis
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Summary:In this structure-property correlation study we have investigated a number of novel disc-shaped compounds incorporating a 1,3,5-trisubstituted benzene at the central core. All the materials with peripheral arms attached through an ester linkage exhibited a columnar phase (Col r or Col h ). The sole use of core-OOC-arm ester linkages resulted in a Col r phase, whereas any inclusion of a core-COO-arm linkage caused a Col h phase. We suggest that columnar mesophases are being generated due to space being occupied in the peripheral regions by the gradual offset stacking of individual molecules in the self-organised phase structure.
ISSN:0267-8292
1366-5855
DOI:10.1080/02678292.2010.490647