Synthesis and liquid crystalline investigation of chiral 6-alkoxy-2-naphathoic acid derivatives

ABSTRACT

A two new series of materials with a chiral fragment derived from ((S)-(─)-2-methyl-1-butanol and 6-alkoxy-2-naphathoic acid as the molecular core was synthesised and investigated. All the homologues exhibited enantiotropic mesomorphism. Chiral smectic C (SmC*), smectic A (SmA) and chiral nematic (N*) phases were observed in different homologues. All the compounds were characterised by spectroscopic and elemental analysis. Thermal investigations and mesophase characterisations for all the compounds were carried out by the combination of DSC and POM analysis. The effects of the central linkage and various terminal normal alkyl chains with its structurally related compounds have been discussed.

Graphical Abstract

KEYWORDS:

• Calamitic liquid crystal
• chiral smectic SmC* phase
• chiral nematic N* phase
• cinnamate
• ester
• smectic A phase

Acknowledgements

We express our thanks to University Grants Commission (UGC) for its On Time Grant for Chemicals facilities. Authors gratefully acknowledge the funding sources University Grants Commission (UGC) for awarding UGC-BSR that made this work possible and comfortable. We are also grateful to Reliance Industries Ltd, Hazira, Surat for their support with the DSC analyses. We also thank Gujarat Narmada Valley Fertilizer Company Ltd. (G.N.F.C.), Bharuch.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

We express our thanks to University Grants Commission (UGC) for its On Time Grant for Chemicals facilities. Authors gratefully acknowledge the funding sources University Grants Commission (UGC) for awarding UGC-BSR that made this work possible and comfortable.