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Synthesis and Mesomorphism of Novel Triphenylene-Based Discotic Liquid Crystals with Chiral Peripheral Chains
Published:
01 November 2005
by MDPI
in The 9th International Electronic Conference on Synthetic Organic Chemistry
session General Organic Synthesis
Abstract: Symmetrical and asymmetrical triphenylene-based discotic liquid crystals with mixed ether-ester peripheral chains, the ester ones with a chiral carbon [ abbreviated as sym-TP(OCnH2n+1)3(OOCC*HClCH2CHMe2)3 and asym-TP(OCnH2n+1)3(OOCC*HClCH2CHMe2)3, n = 4 ~ 8，11 ] were synthesized. The phase transition temperature and the liquid crystal states were determined with polarized optical microscopy (POM) and differential scanning calorimetry (DSC). It was found that the symmetrical isomers have lower clearing points. Some of the discogens show as many as three kinds of columnar mesophases.
Keywords: triphenylene; discotic liquid crystal; columnar mesophase; chirality;
polymesomorphism
