Isoflavone-based trimer liquid crystals: synthesis, characterization, thermal and mesomorphic properties evaluations

ABSTRACT

A new homologous series of mesogens with isoflavone heterocycle have been synthesised and characterised. The symmetric molecular structure consists of middle ethylene/phenylenediamine and peripheral isoflavone and biphenyl cores as trimer fragments. Chemical structures were evaluated using IR, NMR and CHN techniques. Thermal, mesophase behaviours and textural types are studied by DSC and POM instrumentations. Most of the compounds are favouring liquid crystalline behaviours with Smectic and nematic mesophases.

Graphical abstract

KEYWORDS:

• Isoflavone
• heterocycle
• biphenyl
• trimers
• liquid crystals
• smectic phase

Acknowledgments

The authors say thanks to Universiti Sains, Malaysia for providing the DSC, POM and for some sample NMR spectral characterisations.

Disclosure statement

No potential conflict of interest was reported by the authors.

Supplementary materials

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