Easy synthesis of liquid crystalline perylene derivatives

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Abstract
Mesophase forming chromophores are an important challenge of material science. This article describes the synthesis of new perylene mesogenes 10. The materials were obtained by twofold Diels-Alder reactions of our recently published 1:1 isomeric mixture of 3,9- and 3,10-dialkylperylenes with N-heptadecyltriazoline-3,5-diones. In contrast to the analogous derivatives 1 published earlier by our group (see reference 3), the new compounds 10 are prepared by a more efficient synthetic route and on a larger scale. Furthermore the characteristics of the liquid crystalline behavior of both materials are compared.

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