Synthesis and Properties of New Thiadiazole Liquid CrystallineCompounds with Amide Central Linkages

Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (4): 576.

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Synthesis and Properties of New Thiadiazole Liquid CrystallineCompounds with Amide Central Linkages

SHANG Yong-Jia^1,3, LI Mao-Guo¹, LU Wan-Fang², WANG Yan-Guang³

1. College of Chemistry and Material Science, Anhui Normal University, Wuhu 241000;
2. Department of Chemistry, Nanjing University. Nanjing 210093, China;
3. Departerment of Chemistry, Zhejiang University, Hangzhou 310000, China

Received:2000-12-29 Online:2002-04-24 Published:2002-04-24

Abstract

Abstract: Sixteen 2, 5-bisphenyl-1, 3, 4-thiadiazoles with amide central linkages were synthesized.Theirchemical structures were analyzed by IR and ¹H NMR spectrometry.The liquid crystalline properties weredetermined by POMand DSC.The results show that they are all thermally stability liquid crystals andhave higher phase transition temperatures and wide phase transition temperature ranges.The paper indi-cated that the amide central linkages are more conductive to smectic phase.The effect of the carbon atomnumber of terminal group on mesomorphic properties was discussed.

Key words: Amide central linkages, 1,3,4-Thiadiazoles, Liquid crystal, Synthesis

CLC Number:

O621.3

TrendMD:

SHANG Yong-Jia, LI Mao-Guo, LU Wan-Fang, WANG Yan-Guang. Synthesis and Properties of New Thiadiazole Liquid CrystallineCompounds with Amide Central Linkages[J]. Chem. J. Chinese Universities, 2002, 23(4): 576.

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Synthesis and Properties of New Thiadiazole Liquid CrystallineCompounds with Amide Central Linkages

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