Synthesis and Mesomorphism of Novel Triphenylene-Based Discotic Liquid Crystals with Chiral Peripheral Chains

Fu-Jing Yuan; Bi-Qin Wang; Ping Hu; Ke-Qing Zhao

doi:10.3390/ecsoc-9-01461

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Synthesis and Mesomorphism of Novel Triphenylene-Based Discotic Liquid Crystals with Chiral Peripheral Chains

Fu-Jing Yuan

^{1, 1},

Bi-Qin Wang

^{1, 1},

Ping Hu

^{1, 1},

Ke-Qing Zhao

^{*

1, 1}

¹ College of Chemistry and Material Science, Sichuan Normal University, Chengdu, 610066, Sichuan, China

Published: 01 November 2005 by MDPI in The 9th International Electronic Conference on Synthetic Organic Chemistry session General Organic Synthesis

https://doi.org/10.3390/ecsoc-9-01461

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

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Fu-Jing Yuan

Bi-Qin Wang

Ping Hu

Ke-Qing Zhao