Synthesis and mesomorphic characterization of azoesters with a coumarin ring

We have synthesized a homologous series of azoesters consisting of a coumaryl moiety as the end group. Eleven derivatives of this series exhibit mesomorphism. The nematic mesophase is exhibited from ethyl homologue onward, while the smectic phase commences at the pentyl derivative and is exhibited a...

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Bibliographic Details
Published inLiquid crystals Vol. 29; no. 4; pp. 543 - 549
Main Authors Dave, Jayrang S., Menon, Meera R., Patel, Pratik R.
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 01.04.2002
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Summary:We have synthesized a homologous series of azoesters consisting of a coumaryl moiety as the end group. Eleven derivatives of this series exhibit mesomorphism. The nematic mesophase is exhibited from ethyl homologue onward, while the smectic phase commences at the pentyl derivative and is exhibited along with the nematic phase up to the hexadecyl derivative. The N-I transition temperatures curves show the usual odd-even effect. All the compounds in this series are thermally stable and exhibit a wide mesomorphic range of nearly 120°C. Their thermal stabilities and other characteristics are discussed.
ISSN:0267-8292
1366-5855
DOI:10.1080/02678290110114341